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| 1 | 谷子叶片发育过程的基因表达动态分析显示文摘谷子是典型的C_(4)植物,具有较高的光合效率,其中叶片大小和形状会影响光合效率,进而影响其产量和品质。为探索谷子叶片发育调控的分子机制,以新创制的超早熟迷你模式谷子xiaomi为材料,利用转录组测序技术(RNA-Seq)分析幼嫩叶片(Leaf1)、成熟叶片(Leaf2)、旗叶(Leaf3)和开始衰老的叶片(Leaf4)4个发育时期谷子叶片中的基因表达情况。结果表明,与Leaf1相比,在Leaf2有1057个基因差异表达,包括与光形态建成相关的光系统Ⅰ反应中心亚单位N(Si7g28460)、E3泛素连接酶RHA2A(Si7g03580)和RUP1蛋白(Si1g12060)等的基因;Leaf3与Leaf2相比,共有2313个基因差异表达,包括与籽粒干物质积累相关的MADS-box基因(Si2g01630)、玉米醇溶蛋白(Si9g29850)、生长素反应蛋白IAA(Si3g17190)和异淀粉酶(Si6g21130)等的基因;与Leaf3相比,Leaf4仅有20个基因差异表达,包括编码精氨酸脱羧酶(Si1g25160)、漆酶(Si8g20630)和茎28 ku糖蛋白(Si3g11260)的基因。此外,还发现大量未知功能基因,这些基因在xiaomi叶片不同发育时期表达量差异显著。总之,叶片发育是一个极其复杂的过程,研究结果挖掘出大量与光合作用和籽粒干物质积累相关的基因,阐明了谷子叶片发育过程的基因表达动态。 | 王亚敏 申慧敏 单萌 段萌萌 梁雨晴 王兴春 | 2022 | 山西农业科学2022，50，6： | 0 |
| 2 | Natural variation in the SVP contributes to the pleiotropic adaption of Arabidopsis thaliana across contrasted habitats显示文摘Coordinated plant adaptation involves the interplay of multiple traits driven by habitat-specific selection pressures. Pleiotropic effects, wherein genetic variants of a single gene control multiple traits, can expedite such adaptations. Until present, only a limited number of genes have been reported to exhibit pleiotropy. Here, we create a recombinant inbred line (RIL) population derived from two Arabidopsis thaliana (A. thaliana) ecotypes originating from divergent habitats. Using this RIL population, we identify an allelic variation in a MADS-box transcription factor, SHORT VEGETATIVE PHASE (SVP), which exerts a pleiotropic effect on leaf size and drought-versus-humidity tolerance. Further investigation reveals that a natural null variant of the SVP protein disrupts its normal regulatory interactions with target genes, including GRF3, CYP707A1/3, and AtBG1, leading to increased leaf size, enhanced tolerance to humid conditions, and changes in flowering time of humid conditions in A. thaliana. Remarkably, polymorphic variations in this gene have been traced back to early A. thaliana populations, providing a genetic foundation and plasticity for subsequent colonization of diverse habitats by influencing multiple traits. These findings advance our understanding of how plants rapidly adapt to changing environments by virtue of the pleiotropic effects of individual genes on multiple trait alterations. | Xiang Guo Ruyun Liang Shangling Lou Jing Hou Liyang Chen Xin Liang Xiaoqin Feng Yingjun Yao Jianquan Liu Huanhuan Liu | 2023 | Journal of Genetics and Genomics2023，50，12： | 0 |
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