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Light-sucrose interaction stimulates nitrate uptake by wheat roots

文献类型： 外文期刊

作者： Li, Jinzhi 1 ; Wang, Xiaoyan 1 ; Jiang, Ming 1 ; Gao, Jianming 3 ;

作者机构： 1.Taizhou Univ, Sch Life Sci, Zhejiang Prov Lab Plant Evolutionary Ecol & Conse, Taizhou, Zhejiang, Peoples R China

2.Lishui Univ, Coll Ecol, Lishui, Zhejiang, Peoples R China

3.Chinese Acad Trop Agr Sci, Inst Trop Biosci & Biotechnol, Minist Agr, Key Lab Biol & Genet Resources Trop Crops, Haikou 571101, Hainan, Peoples R China

关键词： net nitrate influx; nitrogen; noninvasive; nutrient uptake; positive feed-forward; time course; wheat

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

ISSN： 0190-4167

年卷期： 2019 年 42 卷 7 期

页码：

收录情况： SCI

摘要： To improve nitrate uptake efficiency and minimize fertilizer waster, nitrate uptake control was investigated. In the previous work, we found that illuminating shoots can stimulate nitrate uptake by wheat (Triticum aestivum cv. "EM18") roots, which is thought to be via a signal carried through phloem, maybe a sugar. We also found that sucrose could show features of a specific signal of nitrate uptake. A noninvasive technique method with a high-time resolution (minutes) has enabled us to make the comparison between illumination and sucrose supply. Interestingly, the results showed when plants were in the light, the stimulation by external sucrose was less than that in the dark, indicating light affected nitrate uptake co-operatively with externally supplied sucrose. The interaction between light and externally supplied sucrose showed that the mechanism of light effect on nitrate uptake involved sucrose. This work was useful for further investigating its molecular mechanism and ultimately improving nitrogen use efficiency.

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