Gibberellin induced transcription factor bZIP53 regulates CesA1 expression in maize kernels.
Gibberellin induced transcription factor bZIP53 regulates CesA1 expression in maize kernels.
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赤霉素诱导的转录因子 bZIP53 调节玉米籽粒中 CesA1 的表达。
DOI：
10.1371/journal.pone.0244591
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发表时间：
2021
期刊：
影响因子：
3.7
通讯作者：
Zhang J
中科院分区：
文献类型：
--
作者：
Lv H;Li X;Li H;Hu Y;Liu H;Wen S;Li Y;Liu Y;Huang H;Yu G;Huang Y;Zhang J
玉米籽粒的合理发育对玉米高产稳产、保障国家粮食安全具有重要意义。赤霉素（giberellin， GA）是调节植物生长的激素之一，参与调控玉米籽粒的发育。纤维素是植物细胞的主要成分之一，也受赤霉素的调控。玉米籽粒发育过程中的激素调控机制非常复杂，关于ga介导的玉米籽粒发育过程中纤维素合成调控的报道很少。结果表明，在籽粒生长发育过程中，经ga处理的玉米籽粒长度和容重显著提高，籽粒纤维素含量增加，种皮厚度减小。通过转录组测序筛选出与纤维素合酶基因1 （CesA1）表达密切相关的转录因子basic region/leucine zipper motif 53 (bZIP53)，并测定了GA处理后玉米籽粒发育中纤维素合酶基因的表达情况。结果发现bZIP53的表达显著促进了CesA1的表达。进一步分析转录因子bZIP53，发现基因编码蛋白定位于细胞膜和核膜，但转录因子bZIP53本身没有转录激活。bZIP53与CesA1的相互作用有待进一步研究。
Proper development of the maize kernel is of great significance for high and stable maize yield to ensure national food security. Gibberellin (GA), one of the hormones regulating plant growth, is involved in modulating the development of maize kernels. Cellulose, one of the main components of plant cells, is also regulated by gibberellin. The mechanism of hormone regulation during maize grain development is highly complicated, and reports on GA-mediated modulation of cellulose synthesis during maize grain development are rare. Our study revealed that during grain growth and development, the grain length and bulk density of GA-treated corn kernels improved significantly, and the cellulose content of grains increased, while seed coat thickness decreased. The transcription factor basic region/leucine zipper motif 53 (bZIP53), which is strongly correlated with cellulose synthase gene 1 (CesA1) expression, was screened by transcriptome sequencing and the expression of the cellulose synthase gene in maize grain development after GA treatment was determined. It was found that bZIP53 expression significantly promoted the expression of CesA1. Further, analysis of the transcription factor bZIP53 determined that the gene-encoded protein was localized in the cell and nuclear membranes, but the transcription factor bZIP53 itself showed no transcriptional activation. Further studies are required to explore the interaction of bZIP53 with CesA1.
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