Integrated genomic and transcriptomic insights into the two-component high-affinity nitrate transporters in allotetraploid rapeseed
作者:
Hua, Ying-peng;Zhou, Ting;Song, Hai-xing;Guan, Chun-yun;Zhang, Zhen-hua*
期刊:
Plant and Soil ,2018年427(1-2):245-268 ISSN:0032-079X
通讯作者:
Zhang, Zhen-hua
作者机构:
[Zhang, Zhen-hua; Zhou, Ting; Hua, Ying-peng; Song, Hai-xing] Hunan Agr Univ, Coll Resources & Environm Sci, Southern Reg Collaborat Innovat Ctr Grain & Oil C, Changsha, Hunan, Peoples R China.;[Guan, Chun-yun] Natl Ctr Oilseed Crops Improvement, Hunan Branch, Changsha, Hunan, Peoples R China.
通讯机构:
[Zhang, Zhen-hua] H;Hunan Agr Univ, Coll Resources & Environm Sci, Southern Reg Collaborat Innovat Ctr Grain & Oil C, Changsha, Hunan, Peoples R China.
关键词:
Allotetraploid;High-affinity;Nitrate;Rapeseed;Two-component;Transporter
摘要:
Background and aims: The two-component high-affinity nitrate (NO3 -) transport system (THATS) proteins (NRT2/NAR2) play key roles in the efficient nitrogen (N) uptake and transport under N limitations. We aimed at uncovering the core THATS gene(s) regulating N use efficiency (NUE) in allotetraploid rapeseed (Brassica napus L.). Methods: Genomic information, high-throughput transcriptome sequencing and gene co-expression network were integrated to identify and characterize the core THATS genes. Results: We identified 17 BnaNRT2 and eight BnaNAR2.1 homologs spanning across the rapeseed genome. Copy number and gene presence/absence variations of BnaNRT2s/BnaNAR2.1 s, undergoing strong purifying selection, occurred. The over-representation of Dof, MYB and WRKY cis-regulatory elements and the enrichment of CpG islands, and protein phosphorylation sites indicated the importance of transcriptional and epigenetic regulation in the BnaNRT2 activities, respectively. qRT-PCR assays and high-throughput RNA-seq revealed that both BnaNRT2s and BnaNAR2.1 s were expressed preferentially in the roots; and they showed significantly differential expression under different N forms or different levels of NO3 - supply. A gene co-expression network identified BnaC8.NRT2.1a and BnaC2.NAR2.1 as the core THATS genes. Conclusions: The core THATS members can serve as elite gene resources for crop NUE improvement. The transcriptomics-assisted gene co-expression network analysis provides novel insights regarding the rapid identification of central members within large gene families of plant species with complex genomes. © 2018, Springer International Publishing AG, part of Springer Nature.
语种:
英文
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油菜角果SPS活性变化对其碳氮代谢及油分形成的影响
作者:
李旭霞;宋海星;杨志长;胡宇倩;熊庭浩
期刊:
南方农业学报 ,2018年49(2):234-238 ISSN:2095-1191
作者机构:
[李旭霞; 宋海星; 杨志长; 胡宇倩; 熊庭浩] 湖南农业大学资源环境学院, 土壤肥料资源高效利用国家工程实验室;[李旭霞; 宋海星; 杨志长; 胡宇倩; 熊庭浩] 农田污染控制与农业资源利用湖南省重点实验室;[李旭霞; 宋海星; 杨志长; 胡宇倩; 熊庭浩] 植物营养湖南省普通高等学校重点实验室, 长沙, 410128
关键词:
油菜角果;SPS抑制;可溶性糖;游离氨基酸;籽粒油分产量
摘要:
【目的】探明油菜角果蔗糖磷酸合成酶(Sucrose phosphate synthase,SPS)活性变化对其碳氮代谢产物及油分含量的影响,为进一步研究油菜SPS表达调控机理、改良油菜品质和产量的矛盾提供理论依据。【方法】以氮低效和氮高效油菜品种为试验材料,在正常供氮和氮胁迫条件下进行土培试验。角果发育中期涂抹SPS抑制剂,以涂抹蒸馏水为对照,处理后第3 d上午测定角果皮及籽粒的SPS活性、可溶性糖和游离氨基酸含量,成熟期测定籽粒油分含量。【结果】角果涂抹SPS抑制剂后,不同氮水平条件下不同氮效率油菜品种的SPS活性均明显下降,其差异达显著水平(P<0.05)。氮胁迫条件下,氮低效品种的SPS活性受抑制较明显,而在常氮条件下,氮高效品种的SPS活性受抑制较明显;角果发育期的SPS活性表现为正常供氮处理高于氮胁迫处理,氮高效品种高于氮低效品种;可溶性糖含量的变化规律与SPS活性一致;游离氨基酸含量在不同氮水平间和品种间的差异与SPS活性一致,而对SPS抑制剂的反应与SPS活性和可溶性糖含量不同,即在SPS活性受抑制条件下呈升高趋势。籽粒油分产量也与SPS活性的变化趋势相同,在SPS抑制剂处理下明显下降,氮胁迫和常氮水平下氮低效和氮高效品种的籽粒油分含量分别降低5.00%、 13.13%、17.57%和21.88%,表现出氮高效品种的籽粒油分产量高于氮低效品种、常氮处理高于氮胁迫处理。【结论】无论氮水平如何,氮低效和氮高效油菜品种油菜角果的SPS活性受抑制时,角果皮和籽粒的碳代谢减弱、氮代谢增强,最终导致油分产量降低。
语种:
中文
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甘蓝型油菜PIN家族基因的鉴定与生物信息学分析
作者:
高堃;华营鹏;宋海星;官春云;张振华;...
期刊:
作物学报 ,2018年44(9):1334-1346 ISSN:0496-3490
作者机构:
湖南农业大学资源环境学院, 湖南, 长沙, 410128;南方粮油作物协同创新中心, 南方粮油作物协同创新中心, 湖南, 长沙, 410128;国家油料作物改良中心湖南分中心, 国家油料作物改良中心湖南分中心, 湖南, 长沙, 410128;[高堃; 华营鹏; 宋海星; 张振华; 周婷] 湖南农业大学资源环境学院, 湖南, 长沙, 410128 南方粮油作物协同创新中心, 南方粮油作物协同创新中心, 湖南, 长沙, 410128;[官春云] 国家油料作物改良中心湖南分中心, 国家油料作物改良中心湖南分中心, 湖南, 长沙, 410128
关键词:
甘蓝型油菜;生长素;家族基因;生物信息学
摘要:
PIN家族基因是一类调控植物生长素极性运输的重要载体元件,PIN基因编码生长素输出蛋白,介导生长素在植物体的运输,然而在基因组较复杂的甘蓝型油菜中缺乏系统研究。本研究运用生物信息学方法在甘蓝型油菜全基因组数据库筛选甘蓝型油菜PIN家族基因,对鉴定出的29个Bn PINs基因开展拷贝数变异、分子特征、跨膜结构域、保守基序、染色体定位、系统进化树构建、PIN蛋白二级结构及三级结构预测等研究,结合高通量转录组测序进行低氮胁迫下的转录水平分析。结果表明,甘蓝型油菜PIN家族基因拷贝数明显多于拟南芥、甘蓝和白菜所具有的PIN家族基因数量;Bn PINs蛋白多属于由碱性氨基酸组成的稳定蛋白,含有保守的N末端结构域,二级结构与拟南芥PIN蛋白相似;系统进化选择能力分析表明,Bn PINs基因与甘蓝和白菜PIN家族基因进化关系相近。转录组测序表明,Bn PIN1s、Bn PIN2s、Bn PIN3s基因主要在甘蓝型油菜根部表达且受长期低氮(72 h)诱导,Bn PIN6s和Bn PIN8s基因主要在地上部表达,低氮会抑制Bn PIN6s表达。本研究结果为进一步研究甘蓝型油菜PIN家族基因生物学功能尤其是在响应低氮胁迫中的功能奠定基础,为已知大量数据的其他物种家族基因生物信息学研究提供参考。
语种:
中文
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控释氮肥和氮磷减量对水稻产量及田面水氮磷流失的影响
作者:
石敦杰;杨兰;荣湘民;谢勇;唐丽;...
期刊:
江苏农业科学 ,2018年46(11):44-47 ISSN:1002-1302
作者机构:
湖南农业大学资源环境学院,湖南长沙,410128;湖南农业大学资源环境学院,湖南长沙410128;土壤肥料资源高效利用国家工程实验室/农田污染控制与农业资源利用湖南省重点实验室/植物营养湖南省普通高等学校重点实验室,湖南长沙410128;[谢桂先; 杨兰; 荣湘民; 张玉平; 田昌; 谢勇; 石敦杰; 唐丽; 宋海星] 湖南农业大学
关键词:
水稻;减量施肥;控释氮肥;氮磷流失;田面水
摘要:
为探明氮磷减量对降低水稻田氮磷流失风险的影响,在湖南省毛里湖地区,通过常规施肥(T_1)、控释氮肥减氮20%(T_2)、控释氮肥和过磷酸钙各减量20%(T_3)这3个处理,研究水稻产量、氮磷利用率和田面水氮磷养分浓度的变化。结果表明,与常规施肥处理相比,减氮20%或减氮减磷各20%对产量没有显著影响,而肥料偏生产力(PFP)显著提高,T_2和T_3处理氮肥偏生产力(NPFP)分别较T_1处理提高了35.37%和31.31%,磷肥偏生产力(PPFP)分别提高了8.29%和31.30%。在试验期间,施肥后,T_1处理田面水氮含量呈逐渐下降趋势,而T_2和T_3处理呈先增加后降低趋势;施用控释氮肥的处理(T_2和T_3)总氮含量远低于施用普通尿素的处理(T_1),在施肥后27 d,T_2和T_3处理的田面水总氮、铵态氮和硝态氮含量分别比T_1处理下降了89.11%和89.42%、89.89%和89.64%、61.69%和58.93%。所有处理在施基肥后1 d全磷含量达到最高值,随后缓慢下降,磷肥减量处理全磷含量低于磷肥常量处理。研究结果显示,控释氮肥减量和磷肥减量既可以保证高产稳产,又可以有效降低稻田氮磷素径流损失风险。
语种:
中文
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不同水生植物吸收地表水中氮磷能力差异及其机理
作者:
李旭霞;荣湘民;谢桂先;张玉平;严红星;...
期刊:
水土保持学报 ,2018年32(1):259-263 ISSN:1009-2242
作者机构:
[李旭霞; 荣湘民; 谢桂先; 张玉平; 严红星; 宋海星] 湖南农业大学资源环境学院, 南方粮油作物协同创新中心;[李旭霞; 荣湘民; 谢桂先; 张玉平; 严红星; 宋海星] 土壤肥料资源高效利用国家工程实验室;[李旭霞; 荣湘民; 谢桂先; 张玉平; 严红星; 宋海星] 农田污染控制与农业资源利用湖南省重点实验室;[李旭霞; 荣湘民; 谢桂先; 张玉平; 严红星; 宋海星] 植物营养湖南省普通高等学校重点实验室, 长沙, 410128
关键词:
水生植物;生态拦截;微生物量;根系生理特性
摘要:
为查明不同水生植物吸收地表水中氮磷能力的差异及其机理,采用模拟沟渠试验和盆栽试验,研究了8种水生植物地表水中氮磷吸收能力的差异,并选择氮磷吸收能力差异较大的水生植物品种,进一步探讨了根系生理特性及底泥微生物量变化。结果表明:种植水生植物后沟渠水中氮磷浓度明显减少,供试8种水生植物中以海寿花、狐尾藻、珍珠梅、茭白、再力花的生物量大,养分吸收量多,沟渠水中养分减少也相对明显;种植水生植物后相对于不种植物的沟渠水中养分残留减少比例分别为,总氮22.4%~44.0%、铵态氮24.5%~36.8%、硝态氮13.6%~51.6%、总磷15.6%~34.6%、水溶性磷26.3%~41.3%;氮磷吸收能力强的水生植物与其具有更强的根系活力、更多伤流量以及更高的伤流液养分浓度有关,但并不是某一种植物的以上指标均有优势,茭白的根系活力强、伤流量多,狐尾藻、海寿花、珍珠梅的伤流液中氮磷浓度较高;沟渠水中氮磷减少比例较大的水生植物底泥中微生物总数、硝化细菌和反硝化细菌数、微生物量碳氮磷较高,反之则较低。
语种:
中文
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Genomics-Assisted Identification and Characterization of the Genetic Variants Underlying Differential Nitrogen Use Efficiencies in Allotetraploid Rapeseed Genotypes
作者:
Hua, Ying-peng;Zhou, Ting;Liao, Qiong;Song, Hai-xing;Guan, Chun-yun;...
期刊:
G3-GENES GENOMES GENETICS ,2018年8(8):2757-2771 ISSN:2160-1836
通讯作者:
Zhang, Zhen-hua
作者机构:
[Zhang, Zhen-hua; Liao, Qiong; Zhou, Ting; Hua, Ying-peng; Song, Hai-xing] Hunan Agr Univ, Coll Resources & Environm Sci, Southern Reg Collaborat Innovat Ctr Grain & Oil C, Changsha, Hunan, Peoples R China.;[Guan, Chun-yun] Natl Ctr Oilseed Crops Improvement, Hunan Branch, Changsha, Hunan, Peoples R China.
通讯机构:
[Zhang, Zhen-hua] H;Hunan Agr Univ, Coll Resources & Environm Sci, Southern Reg Collaborat Innovat Ctr Grain & Oil C, Changsha, Hunan, Peoples R China.
关键词:
Genetic variants;genotypes;nitrogen use efficiency;rapeseed;whole-genome re-sequencing
摘要:
Nitrogen (N) is a non-mineral macronutrient essential for plant growth and development. Oilseed rape (AnAnCnCn, 2n = 4x = 38) has a high requirement for N nutrients whereas showing the lowest N use efficiency (NUE) among crops. The mechanisms underlying NUE regulation in Brassica napus remain unclear because of genome complexity. In this study, we performed high-depth and -coverage wholegenome re-sequencing (WGS) of an N-efficient (higher NUE) genotype "XY15" and an N-inefficient (lower NUE) genotype "814" of rapeseed. More than 687 million 150-bp paired-end reads were generated, which provided about 93% coverage and 503 depth of the rapeseed genome. Applying stringent parameters, we identified a total of 1,449,157 single-nucleotide polymorphisms (SNPs), 335,228 InDels, 175,602 structure variations (SVs) and 86,280 copy number variations (CNVs) between the N-efficient and -inefficient genotypes. The largest proportion of various DNA polymorphisms occurred in the inter-genic regions. Unlike CNVs, the SNP/InDel and SV polymorphisms showed variation bias of the An and Cn subgenomes, respectively. Gene ontology analysis showed the genetic variants were mapped onto the genes involving N compound transport and ATPase complex metabolism, but not including N assimilation-related genes. On basis of identification of N-starvation responsive genes through high-throughput expression profiling, we also mapped these variants onto some key NUE-regulating genes, and validated their significantly differential expression between the N-efficient and -inefficient genotypes through qRT-PCR assays. Our data provide genome-wide high resolution DNA variants underlying NUE divergence in allotetraploid rapeseed genotypes, which would expedite the effective identification and functional validation of key NUE-regulating genes through genomics-assisted improvement of crop nutrient efficiency. © 2018 Hua et al.
语种:
英文
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EFFECT OF ELEVATED ATMOSPHERIC CO2ON NITROGEN DISTRIBUTION AND N UTILIZATION EFFICIENCY IN WINTER RAPE (BRASSICA NAPUS L.)
作者:
Zhang, Zhen-Hua* ;Lu, Sheng;Wang, Wen-Ming;Lepo, Joe Eugene;Guan, Chun-Yun;...
期刊:
PAKISTAN JOURNAL OF BOTANY ,2017年49(4):1307-1315 ISSN:0556-3321
通讯作者:
Zhang, Zhen-Hua;Song, Hai-Xing
作者机构:
[Song, Hai-Xing; Wang, Wen-Ming; Zhang, Zhen-Hua; Lu, Sheng; Song, HX] Hunan Agr Univ, Southern Reg Collaborat Innovat Ctr Grain & Oil C, Coll Resources & Environm, Changsha, Hunan, Peoples R China.;[Guan, Chun-Yun] Natl Ctr Oilseed Crops Improvement, Hunan Branch, Changsha, Hunan, Peoples R China.;[Lepo, Joe Eugene] Univ West Florida, Ctr Environm Diagnost & Bioremediat, Pensacola, FL 32514 USA.;[Ismail, Abdelbagi M.] Int Rice Res Inst, Crop Environm Sci Div, DAPO 7777, Manila, Philippines.
通讯机构:
[Zhang, ZH; Song, HX] H;Hunan Agr Univ, Southern Reg Collaborat Innovat Ctr Grain & Oil C, Coll Resources & Environm, Changsha, Hunan, Peoples R China.
关键词:
Oilseed rape (Brassica napus);Elevated CO2 concentrations;Nitrogen (N) distribution;N loss
摘要:
We characterized the responses of plant dry biomass, nitrogen (N) distribution and N-utilization efficiency (NUtE) to changes in CO2 concentration through exposure and culture of winter rape under normal-(380 μmol·mol-1) and elevated-CO2 (760 μmol·mol-1) conditions. Brassica napus (Xiangyou 15) was used as an agriculturally important model plant. Plants were cultivated in a greenhouse with sand culture under normal- (15 mmol·L-1) and limited-N (5 mmol·L-1) conditions. NUtE increased with elevated CO2 regardless of whether N was limited. NUtE was higher under N limitation than under normal N conditions for both normal- and elevated-CO2 conditions.15N labeling was used to assess the distribution of N from vegetative- to reproductive-organs.Ndistribution within the plant and during different developmental stages was affected by CO2 concentration and the level of N application. A higher proportion of N was found in siliques at the harvest stage for N-limited plants compared to normal-N plants. The proportion of N absorbed into siliques after the stem elongation stage under elevated-CO2 conditions was significantly higher than under normal CO2. The proportion of N transport, as well as the total amount of N, absorbed at the stem elongation stage from vegetative organs into siliques under elevated CO2 was significantly lower than under normal-CO2 conditions. However, the proportion of N absorbed at the stem elongation stage and thus lost from the silique under elevated CO2 was significantly higher than under normal CO2. In conclusion, limited N or elevated CO2 generally benefitted plant NUtE. In addition, after the stem elongation stage, elevated CO2 promoted the redistribution of N from plant vegetative tissues to reproductive organs; however, elevated CO2 during or before stem elongation had the opposite effect. © 2017, Pakistan Botanical Society. All rights reserved.
语种:
英文
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Exogenous abscisic acid promotes the nitrogen use efficiency of Brassica napus by increasing nitrogen remobilization in the leaves
作者:
Han, Yong-Liang;Liao, Jia-Yuan;Yu, Yin;Song, Hai-Xing;Rong, Nan;...
期刊:
Journal of Plant Nutrition ,2017年40(18):2540-2549 ISSN:0190-4167
通讯作者:
Zhang, Zhen-Hua
作者机构:
[Song, Hai-Xing; Yu, Yin; Han, Yong-Liang; Zhang, Zhen-Hua; Liao, Jia-Yuan; Rong, Nan] Hunan Agr Univ, Southern Reg Collaborat Innovat Ctr Grain & Oil C, Coll Resources & Environm, Changsha, Hunan, Peoples R China.;[Han, Yong-Liang] Chinese Acad Sci, Inst Soil Sci, State Key Lab Soil & Sustainable Agr, Nanjing, Jiangsu, Peoples R China.;[Guan, Chun-Yun] Natl Ctr Oilseed Crops Improvement, Hunan Branch, Changsha, Hunan, Peoples R China.;[Lepo, Joe Eugene] Univ West Florida, Ctr Environm Diagnost & Bioremediat, Pensacola, FL USA.;[Ismail, Abdelbagi M.] Int Rice Res Inst, Crop Environm Sci Div, Manila, Philippines.
通讯机构:
[Zhang, Zhen-Hua] N;Nongdalu 1, Changsha 410128, Hunan, Peoples R China.
关键词:
Brassica napus;nitrogen;nitrogen remobilization;nitrogen use efficiency (NUE)
摘要:
The effect of exogenous abscisic acid (ABA) on the nitrogen use efficiency (NUE) of Brassica napus was studied by pot experiments using ABA (1 mg L−1) daubed on the leaves at the early siliquing stage. The results showed that activities of proteases and glutamine synthetase (GS) were significantly promoted by the ABA treatment, which increased the capacity of degradation of foliar proteins and biosynthesis of glutamine (N-transport compounds), both of which promote decreased N in leaves of the ABA treatment. L-glutamine, other free amino acids, and soluble sugar content in the phloem sap of the ABA treatment were significantly higher than those of the control. A 15N label trial showed that more 15N was distributed from leaves to the grain by the ABA treatment, which resulted in a significantly higher NUE in the ABA treatment relative to the control. © 2017 Taylor & Francis Group, LLC.
语种:
英文
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不同包膜肥用量对油菜碳氮代谢产物和产量的影响
作者:
杨勇;刘强;宋海星;田昌
期刊:
中国农学通报 ,2017年(06):42-47 ISSN:1000-6850
作者机构:
湖南农业大学资源环境学院/土壤肥料资源高效利用国家工程实验室/农田污染控制与农业资源利用湖南省重点实验室/植物营养湖南省普通高等学校重点实验室
关键词:
油菜;包膜肥;碳氮代谢;产量
摘要:
为研究包膜肥在直播早熟油菜上的应用效果,采用田间小区试验,探究不同用量包膜肥对‘湘杂油1613’碳氮代谢和籽粒产量的影响。结果表明,施肥量相同条件下,施用包膜肥油菜碳氮代谢活跃,叶绿素含量(SPAD)升高,可溶性糖和游离氨基酸总量增加,含量差异不明显;单株有效分枝数和角果数明显增加,每角果粒数和千粒重小幅提高。施用包膜肥增产效果明显,包膜肥施肥量为1500 kg/hm2时产量最高,达到2066.9 kg/hm2。通过拟合建模,包膜肥用量为1611.0 kg/hm2时,产量达到最高为2164.9 kg/hm2;而普通肥的用量为1870.5 kg/hm2时,最高产量为1904.8 kg/hm2,包膜肥产量增加13.6%,同时用量减少13.9%。
语种:
中文
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油菜NO_3~–的吸收、分配及氮利用效率对低氮胁迫的响应
作者:
荣楠;韩永亮;荣湘民;宋海星;彭建伟;...
期刊:
植物营养与肥料学报 ,2017年23(4):1104-1111 ISSN:1008-505X
作者机构:
[荣楠; 韩永亮; 荣湘民; 宋海星; 彭建伟; 谢桂先; 张玉平; 张振华] 湖南农业大学/资源环境学院, 南方粮油作物协同创新中心, 长沙, 410128
关键词:
油菜;氮素吸收效率;氮素利用效率
摘要:
【目的】探究油菜NO_3~–的吸收、分配和对低氮胁迫的响应及其氮利用效率,为理解油菜在不同低氮胁迫下相关生理变化及其氮素利用效率提供科学依据。 【方法】以常规油菜品种814为研究材料,采用砂培试验,在正常供氮水平(10 mmol/L)和低氮胁迫水平(3 mmol/L、1 mmol/L)下,研究油菜的根系特性、蒸腾作用对低氮胁迫的响应及其氮素吸收效率,并研究油菜NO_3~–的运输分配与同化对低氮胁迫的响应及其氮素利用效率。 【结果】与正常供氮处理(10 mmol/L)相比,低氮胁迫处理(3 mmol/L、1 mmol/L)的油菜NO_3~–含量、全氮含量均显著下降,但(NO_3~–)叶/根、(全氮(%))叶/根显著升高,植株根系干物质重、根系吸收面积均显著下降,但根冠比显著升高。油菜植株在低氮胁迫下气孔导度和蒸腾速率显著增加,一方面促进植株对NO_3~–的捕获,另一方面也促使更大比例的NO_3~–分配在植物的地上部分,但植株的水分散失加剧,水分利用效率显著下降。低氮胁迫处理油菜根和叶中NR、GS活性与正常供氮处理之间的差异不显著或有增加,其叶绿素含量、光合速率均显著下降,但光合氮素利用率显著升高。 【结论】在低氮胁迫条件下,油菜植株的氮素和干物质累积均显著下降,但NO_3~–在植株的地上部分分配比例的增加以及光合氮素利用率的升高促使植株的氮素利用效率显著提高。
语种:
中文
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Remediation of Petroleum-contaminated Soil Using Bulrush Straw Powder, Biochar and Nutrients
作者:
Wang, Yanjie;Li, Fayun* ;Rong, Xiangmin;Song, Haixing;Chen, Jiabo
期刊:
Bulletin of Environmental Contamination and Toxicology ,2017年98(5):690-697 ISSN:0007-4861
通讯作者:
Li, Fayun
作者机构:
[Song, Haixing; Wang, Yanjie; Li, Fayun; Rong, Xiangmin] Hunan Agr Univ, Sch Resources & Environm Sci, Changsha 410128, Hunan, Peoples R China.;[Wang, Yanjie; Li, Fayun; Chen, Jiabo] Liaoning Shihua Univ, Inst Ecoenvironm Sci, Fushun 113001, Peoples R China.
通讯机构:
[Li, Fayun] H;[Li, Fayun] L;Hunan Agr Univ, Sch Resources & Environm Sci, Changsha 410128, Hunan, Peoples R China.;Liaoning Shihua Univ, Inst Ecoenvironm Sci, Fushun 113001, Peoples R China.
关键词:
Petroleum hydrocarbons;Biochar;Nutrients;Microorganisms
摘要:
The aim of this study was to determine the remediation efficiency of petroleum-contaminated soil from an oilfield using different types of remediation treatments under laboratory conditions. Compared with unamended soil as the control treatment (T1), soil samples were amended with bulrush straw powder (T2), with biochar alone (T3) and in combination with nutrients (nitrogen and phosphorus) (T4). The remediation experiment was carried out for 8 weeks. The extent of hydrocarbon degradation was monitored gravimetrically, and the residual oil fractions were analyzed by gas chromatography. The characteristics of the polluted soil (water-holding capacity and nutrients) were improved significantly by biochar addition (p < 0.05). The total microbial count increased significantly in the treatment containing biochar and added nutrients (t = 23.429, p = 0.002). The degradation of total petroleum hydrocarbons (TPH) and the main hydrocarbon fractions was higher in T3 and T4, especially in T4, than in T1 and T2. The intensities of the n-alkane fraction, C27–C29 steranes and C33–C35 homohopanes were efficiently decreased in T4 compared to the other treatments. According to the results, petroleum-contaminated soil can be remediated efficiently by adding biochar and nutrients simultaneously, and this combination of remediation was superior to that observed with added bulrush straw powder. © 2017, Springer Science+Business Media New York.
语种:
英文
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NRT1.7基因突变对拟南芥硝酸盐再分配及氮效率的影响
作者:
余音;廖琼;吴智敏;宋海星;官春云;...
期刊:
湖南农业科学 ,2017年(3):1-4 ISSN:1006-060X
作者机构:
湖南农业大学资源环境学院,南方粮油作物协同创新中心,湖南 长沙 410128;国家油料改良中心湖南分中心,湖南 长沙,410128;[官春云] 国家油料改良中心;[张振华; 吴智敏; 宋海星; 廖琼; 余音] 湖南农业大学
关键词:
拟南芥;NRT1.7基因;硝酸盐;氮效率
摘要:
以NRT1.7突变体(nrt1.7-3)和哥伦比亚野生型植株(col.0)为材料,研究NRT1.7基因对植株产量和氮素利用效率(NUE)的影响。结果表明:在花期、角果期nrt1.7-3突变体叶片SPAD值显著升高,出现滞绿现象;与幼嫩叶片相比,硝酸盐更多地累积在老叶中;nrt1.7-3植株在花期、收获期的生物量、产量和氮效率均显著下降。
语种:
中文
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ACC对不同氮效率油菜生长后期硝态氮再利用的调控机理
作者:
余音;卢胜;宋海星;官春云;陈柯豪;...
期刊:
植物营养与肥料学报 ,2017年23(5):1378-1386 ISSN:1008-505X
作者机构:
湖南农业大学资源环境学院, 南方粮油作物协同创新中心;[余音; 卢胜; 宋海星; 陈柯豪; 张振华] 土壤肥料资源高效利用国家工程实验室;[余音; 卢胜; 宋海星; 陈柯豪; 张振华] 农田污染控制与农业资源利用湖南省重点实验室;[余音; 卢胜; 宋海星; 陈柯豪; 张振华] 植物营养湖南省普通高等学校重点实验室, 湖南, 长沙, 410128;国家油料改良中心湖南分中心, 湖南, 长沙, 410128
关键词:
油菜;氮素再利用;氮素利用效率
摘要:
【目的】研究了进一步解析乙烯对油菜生长后期硝态氮(NO_3~–)再利用的影响,揭示植株生长后期氮素再利用的生理机制。【方法】以氮高效油菜品种湘油15(27号)与氮低效油菜品种814(6号)为试验材料,在15 mmol/L氮水平下,每7天浇灌一次50 mL 100 μmol/L 1-氨基环丙烷-1-羧酸(1-am-inocyclopropane-1-carboxylic acid,简称ACC),研究ACC对植物生长后期(花期、收获期)氮素再利用的影响及其与氮素利用效率(NUE)的关系。并用拟南芥野生型(col.0)和突变体(nrt1.5)材料作为验证,分别于玻璃顶网室和22℃恒温培养室进行砂培试验。【结果】ACC处理显著抑制了油菜BnNRT1.5的表达,且植株的衰老可以显著诱导BnNRT1.5的表达。相对于对照处理,ACC处理植株韧皮部汁液NO_3~–的再转运能力显著降低,导致下部叶NO_3~–含量显著升高,中部叶NO_3~–含量显著下降,上部叶NO_3~–含量无显著变化,进而导致植株含氮量和籽粒含氮量显著提高,以及以生物量和籽粒产量为基础的氮素利用效率(NUE)显著降低。由此推测,油菜生长后期氮素的再利用能力受到NRT1.5基因的显著调控。拟南芥野生型和突变体材料的验证结果表明,相对于拟南芥野生型(col.0)材料,拟南芥nrt1.5植株生长后期相对于col.0有更多的NO_3~–累积在植株衰老叶片中,更少的NO_3~–通过韧皮部转运到生长旺盛的新叶,植物生长后期氮素从老叶向新叶转运的再利用能力显著降低。【结论】油菜生长后期氮素的再利用能力受到ACC的显著调控,油菜和拟南芥NRT1.5基因表达量分别受到抑制或者发生基因突变时,会导致植株韧皮部汁液NO_3~–再转运量减少,更多NO_3~–累积在衰老叶片中而不能得以高效的再利用。因此,调控油菜生长后期NRT1.5的表达,提高油菜生长后期氮素的再转运和利用可以作为提高氮素利用效率的有效手段。
语种:
中文
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不同氮效率油菜SPS和PEPC活性差异及其对籽粒产量与油分含量的影响
作者:
余佳玲;宋海星;谢桂先;张振华;廖琼;...
期刊:
植物营养与肥料学报 ,2016年22(3):618-625 ISSN:1008-505X
作者机构:
湖南农业大学资源环境学院, 土壤肥料资源高效利用国家工程实验室;[余佳玲; 宋海星; 谢桂先; 张振华; 廖琼] 南方粮油作物协同创新中心;[余佳玲; 宋海星; 谢桂先; 张振华; 廖琼] 农田污染控制与农业资源利用湖南省重点实验室;[余佳玲; 宋海星; 谢桂先; 张振华; 廖琼] 植物营养湖南省普通高等学校重点实验室, 长沙, 410128;国家油料改良中心湖南分中心, 长沙, 410128
关键词:
油菜;碳氮代谢;籽粒油分
摘要:
【目的】蔗糖磷酸合成酶(sucrose phosphate synthase,SPS)与磷酸烯醇式丙酮酸羧化酶(phosphoenolpyruvate carboxylase,PEPC)分别控制着植物体内的碳骨架向碳代谢和氮代谢的流转,影响作物的产量与品质。为探明氮高效油菜品种在高效利用氮素的同时协调籽粒蛋白与油分累积矛盾的机理,研究了不同氮效率油菜品种的SPS与PEPC活性差异及其对籽粒油分含量的影响。【方法】采用土培试验,以氮高效品种27号(H)与氮低效品种6号(L)为试验材料,在常氮(N)与低氮(S)条件下,研究不同氮效率油菜品种苗期到花期叶片与角果发育初期的角果、角果发育中期的角果皮与籽粒中SPS与PEPC活性变化及差异、生长后期碳素转运量与转运率以及收获期籽粒油分含量的差异。【结果】两种供氮水平下,氮高效品种27号的产量与籽粒油分含量均显著高于氮低效品种6号,品种优势明显;且氮高效品种27号苗期到花期叶片与角果发育初期的角果、角果发育中期的角果皮与籽粒中的SPS与PEPC活性均高于氮低效品种6号,两种供氮水平的规律相同,但是SPS与PEPC活性的比值(SPS/PEPC)却因生育期不同而异,营养生长期叶片中氮高效品种27号的SPS/PEPC高于氮低效品种6号,开花期品种间叶片SPS/PEPC相近,角果发育期主要生殖器官中的SPS/PEPC值氮高效品种反而低于氮低效品种。说明氮高效品种向碳代谢和氮代谢输送的碳骨架在全生育期均多于氮低效品种,而碳代谢对氮代谢的响应只在生育前期强于氮低效品种,生育后期则相反。碳素转运量与转运率、籽粒油分含量与产量也是氮高效品种大于氮低效品种,这可能为氮高效品种协调籽粒蛋白与油分累积矛盾的重要生理机制。供氮水平对上述各指标有不同的影响,籽粒产量、PEPC活性、碳素转运量及转运率以常氮处理高于低氮处理,而油分含量、SPS活性及SPS/PEPC以常氮处理低于低氮处理,但不改变以上指标的品种间差异。【结论】与氮低效品种相比,氮高效品种全生育期向碳、氮代谢均输送更多的碳骨架,这是氮高效品种缓解碳、氮代谢矛盾的重要前提;碳代谢对氮代谢的响应生育前期较高、生育后期较低,同时生育后期有更多营养器官的碳素转运到籽粒,也为油菜生育后期满足籽粒碳、氮代谢所需要的碳骨架,并协调籽粒油分与蛋白质含量的矛盾提供了条件。
语种:
中文
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不同氮效率油菜品种碳素累积转运差异及其对油分形成的影响
作者:
张晓龙;张振华;宋海星;余佳玲;官春云
期刊:
中国农业科学 ,2016年49(18):3542-3550 ISSN:0578-1752
作者机构:
湖南农业大学资源环境学院, 南方粮油作物协同创新中心;[张晓龙; 张振华; 宋海星; 余佳玲] 土壤肥料资源高效利用国家工程实验室;[张晓龙; 张振华; 宋海星; 余佳玲] 农田污染控制与农业资源利用湖南省重点实验室;[张晓龙; 张振华; 宋海星; 余佳玲] 植物营养湖南省普通高等学校重点实验室, 长沙, 410128;国家油料改良中心湖南分中心, 长沙, 410128
关键词:
油菜;碳素累积;碳素转运;油分形成;氮效率
摘要:
【目的】研究不同氮效率油菜品种碳素累积转运差异,为揭示氮高效品种协调籽粒碳氮代谢矛盾、促进油分形成的机理提供理论依据。【方法】采用土培试验,以不同氮效率油菜品种为供试材料,在正常供氮和氮胁迫条件下,研究不同生育期(抽薹期、开花期、角果发育期和收获期)碳素累积与器官分布的差异,并用13C标记技术测定营养器官碳素向生殖器官的再分配比例与再分配量,分析碳素累积转运对籽粒产量形成与油分累积的影响。【结果】氮高效品种的籽粒油分含量略高于氮低效品种,但2种供氮水平下品种间差异均未达到显著水平,而油分产量氮高效品种显著高于氮低效品种;与氮胁迫处理相比,正常供氮处理的油分含量略有降低,但油分产量显著增加。植株碳素累积量各生育期都表现为氮高效品种略高于氮低效品种,但品种间差异也均未达到显著水平;同一品种不同供氮水平处理之间的碳素累积量差异较大,正常供氮处理显著高于氮胁迫处理。不同氮效率油菜品种器官碳素分配比例存在差异,氮高效品种抽薹期和开花期叶片和根的碳素分配比例以及角果发育期和收获期角果与籽粒的碳素分配比例均大于氮低效品种,而全生育期茎中碳分配比例以及角果发育期和收获期根中的碳素分配比例却小于氮低效品种。与氮胁迫处理相比,正常供氮处理的抽薹期和开花期叶中碳素分配增多、根中碳素分配减少,收获期籽粒的碳素分配也是正常供氮处理高于氮胁迫处理。随着生殖生长进程,营养器官碳素向生殖器官的再分配比例和量逐渐增加,品种间差异也逐渐加大。开花期向花的再分配比例和量,氮胁迫条件下氮高效品种低于氮低效品种,正常供氮条件下则相反,但2种氮水平下的品种间差异均不显著;角果发育期向角果的再分配比例和量以及收获期向籽粒的再分配比例和量,2个氮水平均表现为氮高效品种高于氮低效品种,但只有正常供氮条件下差异显著;收获期向角果皮的再分配比例和量,氮胁迫条件下氮高效品种低于氮低效品种,正常供氮条件下则相反,但只有氮胁迫条件下差异显著。油菜收获时50%以上抽薹期累积碳素已离开营养器官,抽薹期累积的碳素减少比例与向生殖器官转运再分配的碳素比例具有相同的处理间变化趋势,但由于碳水化合物的呼吸消耗,碳素减少比例远大于碳素转运再分配比例。【结论】不同氮效率油菜品种各生育期碳素累积量并没有明显差异,但是氮高效品种生长后期有更多的营养器官碳素向生殖器官尤其是向籽粒转运,这是氮高效品种籽粒形成过程中争取更多碳源,缓解碳氮代谢矛盾,促进油分形成的重要机理之一。
语种:
中文
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控释肥料对早熟油菜产量、养分吸收和肥料利用率的影响
作者:
Tian, Chang;Zhou, Xuan;Liu, Qiang;Peng, Jian-wei;Wang, Wen-ming;...
期刊:
浙江大学学报(英文版)B辑:生物医学与生物技术 ,2016年17(10):775-786 ISSN:1673-1581
通讯作者:
Song, Hai-xing
作者机构:
[Wang, Wen-ming; Zhang, Zhen-hua; Tian, Chang; Liu, Qiang; Peng, Jian-wei; Song, Hai-xing; Yang, Yong] Hunan Agr Univ, Hunan Prov Key Lab Farmland Pollut Control & Agr, Southern Reg Collaborat Innovat Ctr Grain & Oil C, Hunan Prov Key Lab Plant Nutr Common Univ,Natl En, Changsha 410128, Hunan, Peoples R China.;[Zhou, Xuan] Zhejiang Univ, Coll Environm Sci & Resources, Hangzhou 310058, Zhejiang, Peoples R China.;[Guan, Chun-yun] Natl Ctr Oilseed Crops Improvement, Hunan Branch, Changsha 410128, Hunan, Peoples R China.
通讯机构:
[Song, Hai-xing] H;Hunan Agr Univ, Hunan Prov Key Lab Farmland Pollut Control & Agr, Southern Reg Collaborat Innovat Ctr Grain & Oil C, Hunan Prov Key Lab Plant Nutr Common Univ,Natl En, Changsha 410128, Hunan, Peoples R China.
关键词:
Early ripening rapeseed;Controlled-release fertilizer;Yield;Nutrient uptake;Fertilizer usage efficiency
摘要:
Background: Nitrogen (N), phosphorous (P), and potassium (K) are critical nutrient elements necessary for crop plant growth and development. However, excessive inputs will lead to inefficient usage and cause excessive nutrient losses in the field environment, and also adversely affect the soil, water and air quality, human health, and biodiversity. Methods: Field experiments were conducted to study the effects of controlled-release fertilizer (CRF) on seed yield, plant growth, nutrient uptake, and fertilizer usage efficiency for early ripening rapeseed (Xiangzayou 1613) in the red-yellow soil of southern China during 2011–2013. It was grown using a soluble fertilizer (SF) and the same amounts of CRF, such as SF1/CRF1 (3750 kg/hm~2), SF2/CRF2 (3000 kg/hm~2), SF3/CRF3 (2250 kg/hm~2), SF4/CRF4 (1500 kg/hm~2), SF5/CRF5 (750 kg/hm~2), and also using no fertilizer (CK). Results: CRF gave higher seed yields than SF in both seasons by 14.51%. CRF4 and SF3 in each group achieved maximum seed yield (2066.97 and 1844.50 kg/hm~2, respectively), followed by CRF3 (1929.97 kg/hm~2) and SF4 (1839.40 kg/hm~2). There were no significant differences in seed yield among CK, SF1, and CRF1 (P>0.05). CRF4 had the highest profit (7126.4 CNY/hm~2) and showed an increase of 12.37% in seed yield, and it decreased by 11.01% in unit fertilizer rate compared with SF4. The branch number, pod number, and dry matter weight compared with SF increased significantly under the fertilization of CRF (P<0.05). The pod number per plant was the major contributor to seed yield. On the other hand, the N, P, and K uptakes increased at first and then decreased with increasing the fertilizer rate at maturity, and the N, P, and K usage efficiency decreased with increasing the fertilizer rate. The N, P, and K uptakes and usage efficiencies of the CRF were significantly higher than those of SF (P<0.05). The N accumulation and N usage efficiency of CRF increased by an average of 13.66% and 9.74 percentage points, respectively, compared to SF. In conclusion, CRF significantly promoted the growth of rapeseed with using total N as the base fertilizer, by providing sufficient N in the later growth stages, and last by reducing the residual N in the soil and increasing the N accumulation and N usage efficiency.
语种:
英文
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土壤含水量和SNP浸种对早熟油菜种子萌发的影响
作者:
王英姿;田昌;刘强;宋海星;荣湘民;...
期刊:
湖南农业科学 ,2016年(7):32-35,38 ISSN:1006-060X
作者机构:
湖南农业大学东方科技学院,湖南长沙 410128;湖南农业大学园艺园林学院,湖南长沙 410128;湖南农业大学资源环境学院,湖南长沙 410128;湖南农业大学资源环境学院,湖南长沙,410128
关键词:
土壤含水量;SNP浸种;早熟油菜;种子萌发
摘要:
以早熟油菜420为材料,研究了土壤含水量和SNP浸种对早熟油菜种子萌发的影响。结果表明:种子萌发前期需要足够的水分,土壤含水量在一定范围内升高能明显促进油菜种子萌发,且土壤含水量与种子发芽势、发芽率呈极显著正相关,与发芽指数、50株干重呈显著正相关;不同土壤含水量下,SNP浸种对油菜种子萌发的作用效果有差异,土壤含水量低(37%)时,SNP浸种对种子萌发有抑制作用;土壤含水量中等(47%)时,SNP浸种对种子萌发有促进作用,且随着浓度升高而加强;土壤含水量较高(57%)时,低浓度SNP浸种对油菜种子萌发有明显的促进作用,高浓度SNP浸种有抑制作用;SNP浓度为50μmol/L时,种子的发芽势、发芽率、发芽指数、活力指数、根长和50株干重等指标均最高,分别达到48.00%、83.72%、40.85、7.66%、3.76 cm和0.15 g。因此,在试验所设范围内,50μmol/L SNP促进油菜种子萌发的效果最佳。
语种:
中文
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包膜复混肥对油菜养分积累与土壤养分形态的影响
作者:
张晓龙;何俊龙;刘强;荣湘民;宋海星;...
期刊:
华北农学报 ,2015年30(3):223-229 ISSN:1000-7091
作者机构:
[张晓龙; 何俊龙; 刘强; 荣湘民; 宋海星] 湖南农业大学 资源环境学院,土壤肥料资源高效利用国家工程实验室,农田污染控制与农业资源利用湖南省重点实验室,植物营养湖南省普通高等学校重点实验室,湖南长沙 410128;国家油料改良中心湖南分中心,湖南长沙,410128;[官春云] 国家油料改良中心湖南分中心
关键词:
包膜复混肥;油菜;产量;养分积累;土壤养分形态
摘要:
为了探讨包膜复混肥的应用效果。采用多点试验,研究了包膜肥对油菜产量、养分积累以及土壤养分形态的影响。结果表明,与普通复混肥相比含量,全量包膜复混肥能够极显著提高油菜籽粒产量,平均产量可达2 501.00 kg/hm~2,增产率平均达到13.72%;可以显著提高油菜茎秆产量,对根产量有一定程度的提高,角果皮产量基本不受影响;包膜复混肥能够促进油菜养分在后期快速积累,主要表现在氮和钾的积累方面,磷的积累量没有表现出较好的效果;包膜复混肥养分释放在衡阳表现较好,湘潭次之,宁乡最差;氮肥效果在衡阳地区与油菜生长相协调,钾肥效果在湘潭地区得到体现,磷肥没有表现出缓控释肥的效果;土壤养分浓度与土壤温度是造成包膜复混肥养分释放差异的重要原因。此外,N-P_2O_5-K_2O(12-6-7)的油菜专用肥进行包膜后,能够提高油菜的产量,但在不同的地方使用效果不同,其中磷的养分释放不能与油菜生长相协调,必须通过大配方小调整或改变包膜技术来实现缓控释肥的目的。
语种:
中文
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包膜肥用量对早熟油菜籽粒产量与油分产量的影响
作者:
田昌;谭太龙;杨勇;宋海星;刘强;...
期刊:
中国土壤与肥料 ,2015年(1):68-72 ISSN:1673-6257
作者机构:
[田昌; 杨勇; 宋海星; 刘强; 彭建伟; 荣湘民] 湖南农业大学资源环境学院;[谭太龙; 官春云] 国家油料改良中心湖南分中心
关键词:
早熟油菜;包膜肥;籽粒产量;油分产量
摘要:
采用大田小区试验,对比研究了不同用量包膜肥与普通肥对早熟油菜籽粒产量和油分产量的影响。结果表明:包膜肥处理的籽粒产量均高于相同用量的普通肥处理,包膜肥处理中B2(包膜肥用量为1 500 kg/hm~2)产量最高,为2 066.9 kg/hm~2, 普通肥处理中A2(普通肥用量为1 500 kg/hm~2)产量最高,为1 839.4 kg/hm~2, B2较A2处理的产量提高12.37%;油分产量变化规律与籽粒产量一致,处理B2最高,为874.5 kg/hm~2, 比处理A2(油分产量为792.8 kg/hm~2)提高10.30%,且包膜肥对油分产量的提高效率随着包膜肥用量的增加而降低。株高、分枝数、单株有效角果与产量呈极显著或显著正相关,对产量贡献最大;包膜肥处理产量的稳定系数较普通肥处理小。综合油菜籽粒产量、油分产量及籽粒产量与农艺性状的相关分析,在本试验所设处理中包膜肥用量为1 500 kg/hm~2的B2处理较好,且株高、分枝数和单株有效角果数对产量贡献最大。
语种:
中文
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Nitrate reutilization mechanisms in the tonoplast of two Brassica napus genotypes with different nitrogen use efficiency
作者:
Han, Yongliang;Liao, Qiong;Yu, Yin;Song, Haixing;Liu, Qiang;...
期刊:
ACTA PHYSIOLOGIAE PLANTARUM ,2015年37(2):1-13 ISSN:0137-5881
通讯作者:
Zhang, Zhenhua
作者机构:
[Yu, Yin; Song, Haixing; Zhang, Zhenhua; Liao, Qiong; Rong, Xiangmin; Gu, Jidong; Liu, Qiang; Han, Yongliang] Hunan Agr Univ, Coll Resources & Environm Sci, Changsha 410128, Hunan, Peoples R China.;[Gu, Jidong] Univ Hong Kong, Sch Biol Sci, Hong Kong, Hong Kong, Peoples R China.;[Lepo, Joe Eugene] Univ W Florida, Ctr Environm Diagnost & Bioremediat, Pensacola, FL 32514 USA.;[Guan, Chunyun] Natl Ctr Oilseed Crops Improvement, Hunan Branch, Changsha 410128, Hunan, Peoples R China.
通讯机构:
[Zhang, Zhenhua] H;Hunan Agr Univ, Coll Resources & Environm Sci, Changsha 410128, Hunan, Peoples R China.
关键词:
N use efficiency;Proton pumps in the tonoplast;N reutilization;Oilseed rape (Brassica napus)
摘要:
Nitrate (NO3-) can accumulate in high concentrations in plant cell vacuoles if it is not reduced, reutilized or transported into the cytoplasm. Such accumulation of NO3- in the vacuole occurs when mechanisms for NO3- assimilation in the cytoplasm are saturated. Moreover, other processes such as efflux across the plasma membrane might affect NO3- accumulation in the vacuole. These are the main reasons limiting nitrogen use efficiency (NUE) in plants. This study elucidates mechanisms for NO3- transport from the cytoplasm to vacuoles by the V-proton pump (V-ATPase and V-PPase) and their relationship with different NUE in four Brassica napus genotypes. Pot experiments were conducted in a greenhouse under normal (15.0 mmol L-1) and limited N (7.5 mmol L-1) concentrations of nitrate using B. napus genotypes that demonstrated either high (742 and Xiangyou 15) or low (814 and H8) NUE (g g(-1)). Specific inhibitors of V-ATPase and V-PPase increased nitrate reductase (NR) activity, resulting in greatly decreased NO3- in plant tissues. Nitrate reductase activity and NO3- content correlated more highly to V-PPase activity than they did to V-ATPase activity, and correlation between V-PPase activity and NO3- content was significantly higher than it was to V-ATPase. Genotypes with high NUE had significantly lower activities of V-ATPase and V-PPase than those with low NUE. In the high-NUE plants, lower activities of V-proton pump underlie mechanisms that result in significantly lower NO3- content in plant tissues of the high-NUE genotypes than those found in plant tissues of the low-NUE genotypes. Our results show that the tonoplast proton pumps V-PPase and V-ATPase strongly negatively affect NR activity and positively affect NO3- content. V-PPase contributed more to this regulatory mechanism than did V-ATPase.
语种:
英文
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