Dataset Information

Reducing expression of a nitrate-responsive bZIP transcription factor increases grain yield and N use in wheat.

ABSTRACT: Nitrogen (N) plays critical role in plant growth; manipulating N assimilation could be a target to increase grain yield and N use. Here, we show that ABRE-binding factor (ABF)-like leucine zipper transcription factor TabZIP60 mediates N use and growth in wheat. The expression of TabZIP60 is repressed when the N-deprived wheat plants is exposed to nitrate. Knock down of TabZIP60 through RNA interference (RNAi) increases NADH-dependent glutamate synthase (NADH-GOGAT) activity, lateral root branching, N uptake and spike number, and improves grain yield more than 25% under field conditions, while overexpression of TabZIP60-6D had the opposite effects. Further investigation shows TabZIP60 binds to ABRE-containing fragment in the promoter of TaNADH-GOGAT-3B and negatively regulates its expression. Genetic analysis reveals that TaNADH-GOGAT-3B overexpression overcomes the spike number and yield reduction caused by overexpressing TabZIP60-6D. As such, TabZIP60-mediated wheat growth and N use is associated with its negative regulation on TaNADH-GOGAT expression. These findings indicate that TabZIP60 and TaNADH-GOGAT interaction plays important roles in mediating N use and wheat growth, and provides valuable information for engineering N use efficiency and yield in wheat.

SUBMITTER: Yang J

PROVIDER: S-EPMC6686140 | biostudies-literature | 2019 Sep

REPOSITORIES: biostudies-literature

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Reducing expression of a nitrate-responsive bZIP transcription factor increases grain yield and N use in wheat.

Yang Junbo J Wang Meiyue M Li Wenjing W He Xue X Teng Wan W Ma Wenying W Zhao Xueqiang X Hu Mengyun M Li Hui H Zhang Yijing Y Tong Yiping Y

Plant biotechnology journal 20190321 9

Nitrogen (N) plays critical role in plant growth; manipulating N assimilation could be a target to increase grain yield and N use. Here, we show that ABRE-binding factor (ABF)-like leucine zipper transcription factor TabZIP60 mediates N use and growth in wheat. The expression of TabZIP60 is repressed when the N-deprived wheat plants is exposed to nitrate. Knock down of TabZIP60 through RNA interference (RNAi) increases NADH-dependent glutamate synthase (NADH-GOGAT) activity, lateral root branchi ...[more]

PMID: 30811829

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Dataset Information

Reducing expression of a nitrate-responsive bZIP transcription factor increases grain yield and N use in wheat.

Publications

Reducing expression of a nitrate-responsive bZIP transcription factor increases grain yield and N use in wheat.

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