文献类型： 外文期刊

作者： Cao Xiaochuang ¹ ; Wu Lianghuan ² ; Ma Qingxu ² ; Yuan Ling ³ ; Zhu Yuanhong ⁴ ; Jin Qianyu ¹ ;

作者机构： 1.Chinese Acad Agr Sci, China Natl Rice Res Inst, State Key Lab Rice Biol, Hangzhou, Zhejiang, Peoples R China

2.Zhejiang Univ, Coll Environm & Resource Sci, Key Lab Environm Remediat & Ecosyst Hlth, Minist Educ, Hangzhou 310058, Zhejiang, Peoples R China

3.Wenzhou Vocat Coll Sci & Technol, Dept Landscape Architecture, Wenzhou, Peoples R China

4.Penn State Univ, Dept Ecosyst Sci & Mangement, University Pk, PA 16802 USA

关键词： N-15-glycine;inorganic N;amino acid uptake;nutritional contribution;sterile hydroponics

期刊名称：JOURNAL OF PLANT NUTRITION （ 影响因子：1.707； 五年影响因子：1.645 ）

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收录情况： SCI

摘要： It is well known that plants are capable of taking up intact amino acids. However, how the nitrogen (N) rates and N forms affect amino acid uptake and amino acid nutritional contribution for plant are still uncertain. Effects of the different proportions of nitrate (NO3-), ammonium (NH4+) and N-15-labeled glycine on pakchoi seedlings glycine uptake were investigated for 21 days hydroponics under the aseptic media. Our results showed that plant biomass and glycine uptake was positively related to glycine rate. NO3- and NH4 (+), the two antagonistic N forms, both significantly inhibited plant glycine uptake. Their interactions with glycine were also negatively related to glycine uptake and glycine nutritional contribution. Glycine nutritional contribution in the treatments with high glycine rate (13.4%-35.8%) was significantly higher than that with low glycine rate (2.2%-13.2%). The high nutritional contribution indicated amino acids can serve as an important N source for plant growth under the high organic and low inorganic N input ecosystem.