ZmMYB155 is involved in starch synthesis and basal endosperm transfer layer development in maize.

IF 4.5 2区生物学 Q1 PLANT SCIENCES

Plant Cell Reports Pub Date : 2025-07-25 DOI:10.1007/s00299-025-03569-9

Quanzhi Li, Jiahui Wang, Ao Zhou, Yuxin Guo, Jingtao Li, Yu Ji, Li Cheng, Changyou Yu, Long Wang, Chengyun Wu, Jiandong Wu

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引用次数: 0

Abstract

Key message: ZmMYB155 acts as an important regulatory factor in starch synthesis and BETL development in maize. Starch synthesis is a critical process determining both the grain quality and quantity of a crop. The basal endosperm transfer layer (BETL) plays a crucial role in nutrient transport and defense against pathogens. However, the regulation of this process in maize remains elusive. This study demonstrated that ZmMYB155 is involved in starch synthesis and BETL development in maize kernels. ZmMYB155 is highly expressed in the maize endosperm. ZmMYB155 is a typical R2R3-MYB transcription factor that localized in the nucleus and cytoplasm. Compared to those of the control, the myb155 mutant displayed reduced seed size, starch, amylose, and amylopectin contents, and increased soluble sugars. Abnormal starch chain length distribution was also observed in the myb155 mutant. Furthermore, BETL development defects were observed in the myb155 mutant. In line with this, a significant decrease in the expression levels of starch synthesis pathway and BETL-specific genes was detected in the myb155 mutant. Collectively, these results demonstrate that ZmMYB155 acts as an important regulatory factor in starch synthesis and BETL development in maize.

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ZmMYB155参与玉米淀粉合成和胚乳转移层发育。

关键信息：ZmMYB155是玉米淀粉合成和BETL发育的重要调控因子。淀粉合成是决定粮食质量和产量的关键过程。胚乳转移层（BETL）在营养物质的运输和对病原体的防御中起着至关重要的作用。然而，这一过程在玉米中的调控仍然难以捉摸。本研究表明，ZmMYB155参与玉米籽粒淀粉合成和BETL发育。ZmMYB155在玉米胚乳中高表达。ZmMYB155是一种典型的定位于细胞核和细胞质中的R2R3-MYB转录因子。与对照相比，myb155突变体的种子大小、淀粉、直链淀粉和支链淀粉含量减少，可溶性糖增加。在myb155突变体中也观察到异常的淀粉链长分布。此外，在myb155突变体中观察到BETL发育缺陷。与此相一致的是，myb155突变体中淀粉合成途径和betl特异性基因的表达水平显著降低。综上所述，ZmMYB155是玉米淀粉合成和BETL发育的重要调控因子。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Plant Cell Reports 生物-植物科学

CiteScore

10.80

自引率

1.60%

发文量

135

审稿时长

3.2 months

期刊介绍： Plant Cell Reports publishes original, peer-reviewed articles on new advances in all aspects of plant cell science, plant genetics and molecular biology. Papers selected for publication contribute significant new advances to clearly identified technological problems and/or biological questions. The articles will prove relevant beyond the narrow topic of interest to a readership with broad scientific background. The coverage includes such topics as: - genomics and genetics - metabolism - cell biology - abiotic and biotic stress - phytopathology - gene transfer and expression - molecular pharming - systems biology - nanobiotechnology - genome editing - phenomics and synthetic biology The journal also publishes opinion papers, review and focus articles on the latest developments and new advances in research and technology in plant molecular biology and biotechnology.