期刊：
POLISH JOURNAL OF ENVIRONMENTAL STUDIES,2023年32(6):5333-5346 ISSN：1230-1485
通讯作者：
Zhou, FM
作者机构：
[Tang, Wang; Zhou, Faming; Zhou, FM] Hunan Agr Univ, Econ Coll, Changsha 410128, Hunan, Peoples R China.;[Tang, Wang; Huang, Kunpeng] Hunan Univ Humanities Sci & Technol, Loudi 417000, Hunan, Peoples R China.;[Zhou, Faming; Zhou, FM] Hunan First Normal Univ, Business Sch, Changsha 410205, Hunan, Peoples R China.
通讯机构：
[Zhou, FM ] H;Hunan Agr Univ, Econ Coll, Changsha 410128, Hunan, Peoples R China.;Hunan First Normal Univ, Business Sch, Changsha 410205, Hunan, Peoples R China.
关键词：
high-standard farmland construction policy;agricultural green development;difference-in-difference;PSM-DID;agricultural socialized services;land scale management;quasi-natural experiment
摘要：
Improving agricultural green development (AGD) has become an urgent choice for developing countries to achieve sustainable development and ensure food security. High standard farmland construction (HSFC) has improved agricultural production conditions and ecological environment through artificial improvement of farmland facilities. This study aims to evaluate the role of high standard farmland construction policy in improving agricultural green development. Based on data of rural areas in Hunan, China, this study explores quantitative impacts of HSFC on AGD by difference-in-difference model. The results are as follows: (1) The policy will significantly promote the AGD, and the results remain significant after a series of robustness tests, such as PSM-DID. (2) Mechanism analysis indicates that policies primarily promote AGD through two paths: promoting agricultural socialized services and land-scale management. (3) The results of the heterogeneity analysis indicate that differences in the driving effects of policies are present at different levels of AGD, and the policy effect is stronger in areas with high farmer income levels, large per capita arable land, and in non-grain-producing areas than in other areas. The conclusions of this study provide new empirical evidence and implementation path for developing countries to promote agricultural green development.
作者机构：
[Song, Fengmei; Tang, Xiaomin; Cao, Yi; Zhao, Weichao] Univ South China, Sch Publ Hlth, Hengyang Med Sch, Hunan Prov Key Lab Typ Environm Pollut & Hlth Haza, Hengyang 421001, Peoples R China.;[Huang, Chaobo] Nanjing Forestry Univ NFU, Coll Chem Engn, Nanjing 210037, Peoples R China.;[Dai, Xuyan] Hunan Agr Univ, Econ Coll, Changsha 410128, Peoples R China.
通讯机构：
[Yi Cao] H;Hunan Province Key Laboratory of Typical Environmental Pollution and Health Hazards, School of Public Health, Hengyang Medical School, University of South China, Hengyang 421001, China
通讯机构：
[Li, YL ] H;Hunan Agr Univ, Coll Hort, Changsha 410128, Peoples R China.;Hunan Acad Agr Sci, Hunan Hort Res Inst, Changsha 410125, Peoples R China.;Kunpeng Inst Modern Agr, Foshan 528226, Peoples R China.
关键词：
anthocyanins;flavonoid biosynthesis;flower coloring;Loropetalum chinense var. rubrum;metabolomic;transcriptomic
摘要：
The Loropetalum chinense and Loropetalum chinense var. rubrum are typical as well as traditional ornamental and Chinese herbal medicines in Asia; however, more information is needed on the mechanisms underlying their flower coloring. Here, we profiled the flavonoid metabolome and carried out full-length sequencing in addition to transcriptome analyses to investigate the flavonoid biosynthesis and global transcriptome changes among different petal coloring cultivars of L. chinense and L. chinense var. rubrum. The total anthocyanins in addition to the RHSCC values and CIE 1976 L*a*b* values of petals were highly consistent with petal color. Moreover, a total of 207 flavonoid components were identified. Of these, 13 flavonoid compounds were considered significantly different expression compounds highly consistent with color information in the 4 samples. Meanwhile, the first reference full-length transcriptome of L. chinense var. rubrum was built, which had 171,783 high-quality nonredundant transcripts with correcting with next-generation sequencing (NGS). Among them, 52,851 transcripts were annotated in the seven databases of NR, KOG, GO, NT, Pfam, Swiss-Port, and KEGG. Combined with NGS analyses, the DETs involved in flavonoids and anthocyanins contributed greatest to the flower coloring. Additionally, the different expressions of eight LcDFRs and four LcANS genes were positively correlated with flavonoid biosynthesis, and the four LcBZ1 as well as one Lc3Mat1 were positively correlated with the content of seven anthocyanins revealed by coupling with metabolomics and transcriptomics analyses. Together, these results were used to mine candidate genes by analyzing flower coloring changes at comprehensive metabolic and transcriptomic levels in L. chinense and L. chinense var. rubrum.
