Involvement of nitrogen in storage root growth and related gene expression in sweet potato (Ipomoea batatas).,Plant Biology

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Involvement of nitrogen in storage root growth and related gene expression in sweet potato (Ipomoea batatas).
Plant Biology ( IF 4.2 ) Pub Date : 2020-02-26 , DOI: 10.1111/plb.13088
Z Yao ₁ , Z Wang ₁ , B Fang ₁ , J Chen ₁ , X Zhang ₁ , Z Luo ₁ , L Huang ₁ , H Zou ₁ , Y Yang ₁

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Nitrogen (N) could affect storage root growth and development of sweet potato. To manage external N concentration fluctuations, plants have developed a wide range of strategies, such as growth changes and gene expression. Five sweet potato cultivars were used to analyse the functions of N in regulating storage root growth. Growth responses and physiological indicators were measured to determine the physiological changes regulated by different N concentrations. Expression profiles of related genes were analysed via microarray hybridization data and qRT-PCR analysis to reveal the molecular mechanisms of storage root growth regulated by different N concentrations. The growth responses and physiological indicators of the five cultivars were changed by N concentration. The root fresh weight of two of the sweet potato cultivars, SS19 and GS87, was higher under low N concentrations compared with the other cultivars. SS19 and GS87 were found to be having greater tolerance to low N concentration. The expression of N metabolism and storage root growth related genes was regulated by N concentration in sweet potato. These results reveal that N significantly regulated storage root growth. SS19 and GS87 were more tolerant to low N concentration and produced greater storage root yield (at 30 days). Furthermore, several N response genes were involved in both N metabolism and storage root growth.

中文翻译：

氮参与甘薯（番薯（Ipomoea batatas））的贮藏根生长和相关基因表达。

氮可能影响甘薯的贮藏根生长。为了控制外部氮浓度波动，植物已经开发出多种策略，例如生长变化和基因表达。利用5个甘薯品种分析了氮在调节贮藏根生长中的功能。测量生长反应和生理指标以确定不同氮浓度调节的生理变化。通过微阵列杂交数据和qRT-PCR分析相关基因的表达谱，揭示了不同氮浓度调节的贮藏根生长的分子机制。氮浓度改变了5个品种的生长反应和生理指标。两个甘薯品种SS19和GS87的根鲜重在低氮浓度下比其他品种更高。发现SS19和GS87对低氮浓度具有更大的耐受性。氮素浓度调节甘薯氮素代谢和贮藏根系生长相关基因的表达。这些结果表明，氮显着调节贮藏根的生长。SS19和GS87对低氮浓度更具耐受性，并在30天时产生更高的贮藏根产量。此外，几个N反应基因参与了N代谢和贮藏根的生长。这些结果表明，氮显着调节贮藏根的生长。SS19和GS87对低氮浓度更具耐受性，并在30天时产生更高的贮藏根产量。此外，几个N反应基因参与了N代谢和贮藏根的生长。这些结果表明，氮显着调节贮藏根的生长。SS19和GS87对低氮浓度更具耐受性，并在30天时产生更高的贮藏根产量。此外，几个N反应基因参与N代谢和贮藏根的生长。

更新日期：2020-02-26

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