RNA-seq reveals hormone-regulated synthesis of non-cellulose polysaccharides associated with fiber strength in a single-chromosomal-fragment-substituted upland cotton line
文献类型： 外文期刊
作者： Song, Zhangqiang 1 ; Chen, Yu 1 ; Zhang, Chuanyun 1 ; Zhang, Jingxia 1 ; Huo, Xuehan 1 ; Gao, Yang 1 ; Pan, Ao 1 ; Du, Zhaohai 1 ; Zhou, Juan 1 ; Zhao, Yanxiu 2 ; Liu, Zhi 1 ; Wang, Furong 1 ; Zhang, Jun 1 ;
作者机构： 1.Shandong Acad Agr Sci, Cotton Res Ctr, Minist Agr & Rural Affairs, Key Lab Cotton Breeding & Cultivat Huang Huai Hai, Jinan 250100, Shandong, Peoples R China
2.Shandong Normal Univ, Coll Life Sci, Jinan 250014, Shandong, Peoples R China
3.Hunan Agr Univ, Coll Biosci & Biotechnol, Changsha 410128, Hunan, Peoples R China
期刊名称：CROP JOURNAL （ 影响因子：4.407； 五年影响因子：5.687 ）
ISSN： 2095-5421
年卷期： 2020 年 8 卷 2 期
页码：
收录情况： SCI
摘要： Cotton fibers are the main raw materials of the textile industry. Exogenous superior fiber genes have been introduced into upland cotton to develop high-yield cultivars with excellent fiber quality. We used a single chromosomal segment on the chromosome A07 substitution line SL7, with high fiber strength, to investigate the molecular mechanism underlying its fiber quality. RNA-seq and KEGG analysis showed that 70 differentially expressed genes were enriched in plant hormone transduction pathways, including auxin, ethylene and abscisic acid, in fibers at 10 days post-anthesis (DPA). Among these, fiber-development related transcription factors MYB and NAC, including Gh_A11G0981 (MYB108), Gh_A03G0887 (NAC029), and Gh_A08G1691 (NAC021), were significantly upregulated in SL7, as were numerous cellulose synthase-like (CSL) genes involved in non-cellulose polysaccharide and cell wall synthesis. The hemicellulose content of SL7 was significantly higher than that of L22, an upland cotton cultivar. These results suggest that key genes in the introgressed chromosomal segment of SL7 regulate the expression of transcription-factor genes via hormone-transduction pathways, thereby inducing the expression of genes involved in secondary wall synthesis and ultimately improving fiber quality. This study has shed light on the molecular mechanism of fiber development and will contribute to the improvement of fiber quality of upland cotton by molecular breeding. (c) 2019 Crop Science Society of China and Institute of Crop Science, CAAS. Production and hosting by Elsevier B.V. on behalf of KeAi Communications Co., Ltd. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/
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