GbLMI1 over-expression improves cotton aboveground vegetative growth
作者机构：College of Agronomy Tarim University Biotechnology Research Institute Chinese Academy of Agricultural Sciences
出 版 物：《Journal of Integrative Agriculture》 (农业科学学报(英文版))
年 卷 期：2024年第10期
页 面：3457-3467页
核心收录：
基 金：supported by the National Natural Science Foundation of China (5201101621)
摘 要：Leaves are the main organ for photosynthesis and organic synthesis in *** shape has important effects on photosynthetic efficiency and canopy formation,thereby affecting cotton *** studies have shown that LMI1 （LATE MERISTEM IDENTITY1） is the main gene regulating leaf *** this study,the LMI1 gene was inserted into the 35S promoter expression vector,and cotton plants overexpressing LMI1 （OE） were obtained through genetic *** analysis of the biological traits of the T1and T2populations showed that compared to the wild type （WT）,OE plants had significantly larger leaves,thicker stems and significantly greater dry ***,plant sections of the main vein and petiole showed that the numbers of cells in those tissues of OE plants were significantly *** addition,RNA-seq analysis revealed the differential expression of genes related to gibberellin synthesis and NAC gene family （genes containing the NAC domain） between the OE and WT plants,suggesting that LMI1 is involved in secondary wall formation and cell proliferation,which promotes stem ***,Gene Ontology （GO） analysis revealed enrichment in the terms of calcium ion binding,and Kyoto Encyclopedia of Genes and Genomes （KEGG） analysis showed enrichment in the terms of fatty acid degradation,phosphatidylinositol signal transduction system,and c AMP （cyclic adenosine monophosphate） signal *** results suggested that LMI1 OE plants are responsive to gibberellin hormone signals,and have altered messenger signals (c AMP,Ca2+) which amplify this function,to promote stronger aboveground vegetative *** study found the LMI1 greatly increased the vegetative growth in cotton,which is the basic requirement for higher yield.
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