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BIOMASS YIELD 1 regulates sorghum biomass and grain yield via the shikimate pathway

文献类型： 外文期刊

作者： Chen, Jun 1 ; Zhu, Mengjiao 2 ; Liu, Ruixiang 1 ; Zhang, Meijing 1 ; Lv, Ya 2 ; Liu, Yishan 2 ; Xiao, Xin 2 ; Yuan, Jianh 1 ;

作者机构： 1.Jiangsu Acad Agr Sci, Inst Food Crops, Prov Key Lab Agrobiol, Zhongling St 50, Nanjing 210014, Peoples R China

2.China Agr Univ, Dept Plant Genet Breeding & Seed Sci, Beijing 100193, Peoples R China

3.Beijing Key Lab Crop Genet Improvement, Beijing 100193, Peoples R China

4.MOE, Lab Crop Heterosis & Utilizat, Beijing 100193, Peoples R China

5.China Agr Univ, Coll Grassland Sci & Technol, 2 Yuanmingyuan West Rd, Beijing 100193, Peoples R China

6.Japan Grassland Agr & Forage Seed Assoc, Forage Crop Res Inst, 388-5 Higashiakada, Nasushiobara, Tochigi 3292742, Japan

关键词： Biomass yield; flavonoids; metabolic profiling; metabolism; shikimate pathway; sorghum; transcriptome

期刊名称：JOURNAL OF EXPERIMENTAL BOTANY （ 影响因子：6.992； 五年影响因子：7.86 ）

ISSN： 0022-0957

年卷期： 2020 年 71 卷 18 期

页码：

收录情况： SCI

摘要： Biomass and grain yield are key agronomic traits in sorghum (Sorghum bicolor); however, the molecular mechanisms that regulate these traits are not well understood. Here, we characterized the biomass yield 1 (by1) mutant, which displays a dramatically altered phenotype that includes reduced plant height, narrow stems, erect and narrow leaves, and abnormal floral organs. Histological analysis suggested that these phenotypic defects are mainly caused by inhibited cell elongation and abnormal floral organ development. Map-based cloning revealed that BY1 encodes a 3-deoxyd-arabino-heptulosonate-7-phosphate synthase (DAHPS) that catalyses the first step of the shikimate pathway. BY1 was localized in chloroplasts and was ubiquitously distributed in the organs examined, particularly in the roots, stems, leaves, and panicles, which was consistent with its role in biomass production and grain yield. Transcriptome analysis and metabolic profiling revealed that BY1 was involved in primary metabolism and that it affected the biosynthesis of various secondary metabolites, especially flavonoids. Taken together, these findings demonstrate that BY1 affects biomass and grain yield in sorghum by regulating primary and secondary metabolism via the shikimate pathway. Moreover, our results provide important insights into the relationship between plant development and metabolism.

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