Zinc and alpha-Ketoglutaric Acid Modulates Plant Growth, Gas Exchange Attributes, Chlorophyll Fluorescence and Zn Content in Rice
文献类型： 外文期刊
作者： Lin, Xuwei 1 ; Huang, Zhuoli 1 ; Fan, Pingshan 1 ; Zhang, Long 1 ; Yan, Yangfan 1 ; Yang, Yihan 1 ; Wei, Xinhang 1 ; Mo, 1 ;
作者机构： 1.South China Agr Univ, Coll Agr, Guangzhou 510642, Guangdong, Peoples R China
2.Hainan Univ, Inst Trop Agr & Forestry, Hainan Key Lab Sustainable Utilizat Trop Bioresou, Haikou 570228, Hainan, Peoples R China
3.Minist Agr, Sci Observing & Expt Stn Crop Cultivat South Chin, Guangzhou 510642, Guangdong, Peoples R China
关键词： Zn alpha-ketoglutaric acid; Plant weight; Photosynthetic attributes; Chlorophyll fluorescence index
期刊名称：INTERNATIONAL JOURNAL OF AGRICULTURE AND BIOLOGY （ 影响因子：0.822； 五年影响因子：0.906 ）
ISSN： 1560-8530
年卷期： 2020 年 23 卷 1 期
页码：
收录情况： SCI
摘要： The CO2 increment under climate change leads to adverse growth and quality such as decrease in Zn content of crops. The organic carbon nutrition such as alpha-ketoglutaric acid (A) is an important carbon source for crops contributing to better crop growth and Zn content in plant. Zn fertilization enhanced its absorption and assimilation resulting in better crop growth. However, the effect of alpha-ketoglutaric acid and Zn in regulating of its content in rice plant, on growth, photosynthetic attributes and chlorophyll fluorescence are still limited. A pot experiment was conducted by using two aromatic rice cultivars, Meixiangzhan 2 and Yuxiangyouzhan. The rice plants at 3 leaf stage were subjected to two Zn levels (Zn-; 0 mg.kg(-1) and Zn+;10 mg.kg(-1)) and two alpha-ketoglutaric acid levels (A-; 0 mg.L-1 and A+; 50 mg.L-1). The results demonstrated strong Zn and a-ketoglutaric acid interactive effect on the plant Zn content and root dry weight. The highest Zn content in plant for Meixiangzhan 2 (19.59 mu g.g(-1)) and Yuxiangyouzhan (25.75 mu g.g(-1)) was observed under Zn-A+ treatment, followed by Zn+A-, Zn+A+ and Zn-A- treatments. The highest root dry weight was found under Zn+A+. Moreover, Zn and alpha-ketoglutaric acid application and the iteration of Zn and alpha-ketoglutaric acid strongly affected the chlorophyll fluorescence particularly at 1d, and regulated the photosynthetic parameters. The relationships between the Zn content in plant and the investigated parameters have been also accessed, with Zn content increased, plant height, photosynthetic attributes and chlorophyll fluorescence were improved. The Zn and alpha-ketoglutaric acid could regulate the Zn content in rice plant which was associated with the modulation of the plant growth, photosynthetic attributes and chlorophyll fluorescence. (C) 2020 Friends Science Publishers
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