期刊论文

中文

湖南农业大学学报(自然科学版)

1007-1032

2022

48

4

386-393

10.13331/j.cnki.jhau.2022.04.002

32072664:国家自然科学基金 2020JJ5242:湖南省自然科学基金 2021JJ0004:湖南省自然科学基金

本校为第一机构

以甘蓝型油菜‘中双 11’为材料，设置低氮 LN（0.3 mmol/L NO3–）和高氮 HN（6.0 mmol/L NO3–）水平，通过营养液培养试验, 探究低氮对油菜根尖细胞伸长分裂过程和细胞壁组分的影响。试验结果表明：低氮处理诱导了油菜根系的伸长，根表面积和根体积的增加, 根冠比和氮生理利用效率均显著高于高氮处理；低氮处理提高了油菜根尖伸长区细胞分裂素含量及成熟区生长素的含量，诱导了伸长区细胞分裂和成熟区细胞伸长；对细胞壁主要组分（果胶、纤维素、半纤维素和木质素）进行定量分析，发现低氮处理显著提高了油菜根系细胞壁中果胶和纤维素的含量，但不同氮水平处理的油菜根细胞壁中半纤维素、木质...

As an important oil crop in China,rapeseed(Brassica napus L.)has a high demand for nitrogen(N)and the N deficiency in soil is an important limiting factor for rapeseed production.Taking Brassica napus L.as the experimental material,low N(LN,0.3 mmol/L NO3–)and high N(HN,6.0 mmol/L NO3–)treatments were set up in this study.The results showed that the low N promoted root elongation of rapeseed,and induced higher root/shoot ratio and N physiological efficiency.In the meantime,low N increased cytokinin content in the elongation zone and auxin con...