BRITTLE CULM16 (BRITTLE NODE) is required for the formation of secondary cell walls in rice nodes

文献类型： 外文期刊

第一作者： Wang Ying

作者： Wang Ying;Ren Yu-long;Zhou Kun-neng;Zhang Long;Ming Ming;Wu Fu-qing;Lin Qi-bing;Wang Jiu-lin;Guo Xiu-ping;Zhang Xin;Lei Cai-lin;Cheng Zhi-jun;Wan Jian-min;Chen Sai-hua;Xu Yang;Wan Jian-min

作者机构： Chinese Acad Agr Sci, Inst Crop Sci, Natl Key Facil Crop Gene Resources & Genet Improv, Beijing 100081, Peoples R China;Chinese Acad Agr Sci, Inst Crop Sci, Natl Key Facil Crop

关键词： rice (Oryza sativa L.);brittle node;sclerenchyma tissue;secondary cell wall

期刊名称：JOURNAL OF INTEGRATIVE AGRICULTURE （ 2020影响因子：2.848； 五年影响因子：2.979 ）

ISSN： 2095-3119

年卷期： 2017 年 16 卷 6 期

页码：

收录情况： SCI

摘要： Plant cell walls constitute the skeletal structures of plant bodies, and thus confer lodging resistance for grain crops. While the basic cell wall synthesis machinery is relatively well established now, our understanding of how the process is regulated remains limited and fragmented. In this study, we report the identification and characterization of the novel rice (Oryza sativa L.) brittle cu/m16 (brittle node; bc16) mutant. The brittle node phenotype of the bc16 mutant appears exclusively at nodes, and resembles the previously reported bc5 mutant. Combined histochemical staining and electron microscopy assays revealed that in the bc16 mutant, the secondary cell wall formation and thickening of node sclerenchyma tissues are seriously affected after heading. Furthermore, cell wall composition assays revealed that the bc16 mutation led to a significant reduction in cellulose and lignin contents. Using a map-based cloning approach, the bc16 locus is mapped to an approximately 1.7-Mb region of chromosome 4. Together, our findings strengthen evidence for discretely spatial differences in the secondary cell wall formation within plant bodies.

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