文献类型: 外文期刊
作者: Li, Haiyan 1 ; Tao, Huifang 1 ; Xiao, Yao 1 ; Qin, Li 2 ; Lan, Chen 3 ; Cheng, Beijiu 1 ; Roberts, Jeremy A. 4 ; Zhang, Xuebin 3 ; Lu, Xiaoduo 1 ;
作者机构: 1.Anhui Agr Univ, Sch Life Sci, Natl Engn Lab Crop Stress Resistance, Hefei 230036, Peoples R China
2.Qilu Normal Univ, Inst Adv Agr Technol, Jinan 250200, Peoples R China
3.Henan Univ, Sch Life Sci, State Key Lab Crop Stress Adaptat & Improvement, Henan Joint Int Lab Crop Multi Res, Jinming Rd, Kaifeng 475004, Peoples R China
4.Univ Plymouth, Fac Sci & Engn, Sch Biol & Marine Sci, Plymouth PL4 8AA, England
5.Hainan Acad Agr Sci, Lab Mol Breeding Design Maize Sanya Inst, Sanya 572000, Peoples R China
关键词: Zea mays; EMS-induced mutants; dwarf; alpha-xylosidase; XXXG
期刊名称:PLANT JOURNAL ( 影响因子:7.2; 五年影响因子:7.9 )
ISSN: 0960-7412
年卷期: 2023 年
页码:
收录情况: SCI
摘要: Plant architecture, lodging resistance, and yield are closely associated with height. In this paper, we report the identification and characterization of two allelic EMS-induced mutants of Zea mays, xyl-1, and xyl-2 that display dwarf phenotypes. The mutated gene, ZmXYL, encodes an alpha-xylosidase which functions in releasing xylosyl residue from a beta-1,4-linked glucan chain. Total alpha-xylosidase activity in the two alleles is significantly decreased compared to wild-type plants. Loss-of-function mutants of ZmXYL resulted in a decreased xylose content, an increased XXXG content in xyloglucan (XyG), and a reduced auxin content. We show that auxin has an antagonistic effect with XXXG in promoting cell divisions within mesocotyl tissue. xyl-1 and xyl-2 were less sensitive to IAA compared to B73. Based on our study, a model is proposed that places XXXG, an oligosaccharide derived from XyG and the substrate of ZmXYL, as having a negative impact on auxin homeostasis resulting in the dwarf phenotypes of the xyl mutants. Our results provide a insight into the roles of oligosaccharides released from plant cell walls as signals in mediating plant growth and development.
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