Differential gene expression as an indicator of nitrogen sufficiency in field-grown potato plants

文献类型： 外文期刊

第一作者： Tai, Helen

作者： Tai, Helen;De Koeyer, David;Li, Xiu-Qing;Luo, Sainan;Xiong, Xingyao;Millard, Pete

作者机构：

关键词： Nitrate reductase;SPAD;Ammonium transporter;Petiole nitrate concentration;Solanum tuberosum

期刊名称：PLANT AND SOIL （ 影响因子：4.192； 五年影响因子：4.712 ）

ISSN： 0032-079X

年卷期： 2011 年 345 卷 1-2 期

页码：

收录情况： SCI

摘要： Use of an in-season measure of crop N sufficiency to guide fertilizer management is one approach to match the supply of N to the crop N demand. This study examined use of gene expression in leaf tissue of field-grown potatoes for use in assessment of potato N sufficiency. Potato cultivar 'Shepody' was grown with six fertilizer N rates (0-250 kg N ha(-1)). Leaf disks were collected weekly for quantification of the expression of N uptake/transport, N assimilation, and amino acid metabolism genes in leaf tissue by nCounter. Many of the genes evaluated were responsive to crop N supply, but the response varied widely among sampling dates. The exception was an ammonium transporter gene (AT1) which was highly expressed, was relatively consistent across sampling dates, was closely related to root zone soil nitrate concentration across N rates and sampling dates, and was highly negatively correlated with total tuber yield. The level of expression of AT1 in leaf tissue was as good as or better than conventional chemical or optical measures of potato N sufficiency in the current study.

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