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
作者： Mao, Yunxia 1 ; Chai, Xirong 1 ; Zhong, Min 1 ; Zhang, Liang 1 ; Zhao, Puyan 1 ; Kang, Yunyan 1 ; Guo, Juxian 2 ; Yang, Xian 1 ;
作者机构： 1.South China Agr Univ, Coll Hort, Guangzhou 510642, Peoples R China
2.Guangdong Acad Agr Sci, Vegetable Res Inst, Guangdong Prov Key Lab Vegetable New Technol Res, Guangzhou 510640, Peoples R China
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.
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