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Position: Home > Articles > BRITTLE CULM16 (BRITTLE NODE) is required for the formation of secondary cell walls in rice nodes Journal of Integrative Agriculture 2017,16 (6)

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

作者：

Wang Ying;Ren Yu-long;Chen Sai-hua;Xu Yang;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

单位：

Chinese Acad Agr Sci, Inst Crop Sci, Natl Key Facil Crop Gene Resources & Genet Improv, Beijing 100081, Peoples R China;Nanjing Agr Univ, Natl Key Lab Crop Genet & Germplasm Enhancement, Nanjing 210095, Jiangsu, Peoples R China

关键词：

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

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

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