Effects of nitrogen and magnesium nutrient on the plant growth, quality, photosynthetic characteristics, antioxidant metabolism, and endogenous hormone of Chinese kale (Brassica albograbra Bailey)

文献类型： 外文期刊

第一作者： Mao, Yunxia

作者： Mao, Yunxia;Chai, Xirong;Zhong, Min;Zhang, Liang;Zhao, Puyan;Kang, Yunyan;Yang, Xian;Guo, Juxian

作者机构：

关键词： Chinese kale; Nitrogen and magnesium ratio; Plant parameter; Antioxidant enzyme; Growth promoting hormone

期刊名称：SCIENTIA HORTICULTURAE （ 影响因子：4.342； 五年影响因子：4.342 ）

ISSN： 0304-4238

年卷期： 2022 年 303 卷

页码：

收录情况： SCI

摘要： In this study, the variety "Cuibao' was used as material. Hydroponic culture trial was conducted to investigate the effects of nitrogen (N) and magnesium (Mg) on plant growth, quality, photosynthetic characteristics, antioxidant metabolism, and endogenous hormone of Chinese kale. Three N levels (2.5, 7.5 and 22.5 mmol/L) and three Mg levels (0.5, 1.4 and 4.2 mmol/L) were applied, respectively. The experiment was laid out in a completely orthogonal design which formed a total of nine different combined treatments of N and Mg (N2.5Mg0.5, N2.5Mg1.4, N2.5Mg4.2, N7.5Mg0.5, N7.5Mg1.4, N7.5Mg4.2, N22.5Mg0.5, N22.5Mg1.4, and N22.5Mg4.2). As compared to other combined treatments, the N7.5Mg1.4 treatment obviously promoted plant weight and improved the quality. Moreover, the N7.5Mg1.4 treatment significantly increased catalase (CAT) activity and decreased the contents of malondialdehyde (MDA) and proline (Pro). Interestingly, the combinations of N and Mg significantly affected the homeostasis of endogenous hormones. The N7.5Mg1.4 treatment obviously increased the contents of growth promoting hormones indo-3-acetic acid (IAA) and zeatin (ZT) and reduced the contents of growth inhibitory hormone abscisic acid (ABA), increased the ratios of IAA/ABA, gibberellin acid (GA(3))/ABA and ZT/ABA. These results revealed that the reasonable combined treatment of N and Mg effectively improved the photosynthetic characteristics, and the homeostasis of antioxidant metabolism and endogenous hormones, which resulted in regulating the plant growth and increasing plant fresh weight of Chinese kale.

分类号：

  • 相关文献
作者其他论文 更多>>

微信小程序