Genome-wide identification of small G protein ROPs and their potential roles in Solanaceous family
文献类型： 外文期刊
作者： Yang, Shuqing 1 ; Yan, Ningning 1 ; Bouwmeester, Klaas 3 ; Na, Ren 4 ; Zhang, Zhiwei 1 ; Zhao, Jun 1 ;
作者机构： 1.Inner Mongolia Agr Univ, Coll Hort & Plant Protect, Hohhot 010019, Peoples R China
2.Inner Mongolia Acad Agr & Anim Husb Sci, Vegetable Inst, Hohhot 010031, Peoples R China
3.Wageningen Univ & Res, Lab Phytopathol, NL-6708 PB Wageningen, Netherlands
4.Hebei Acad Agr & Forestry Sci, Inst Cereal & Oil Crops, Shijiazhuang 050035, Hebei, Peoples R China
关键词： Small GTPase ROPs; Solanaceous family; Genome-wide screening; Phylogenetic analysis; Plant growth and development; Plant immunity
期刊名称：GENE （ 影响因子：3.688； 五年影响因子：3.329 ）
ISSN： 0378-1119
年卷期： 2020 年 753 卷
页码：
收录情况： SCI
摘要： Small GTPases function as molecular switches to active or inactive signaling cascades via binding or hydrolyzing GTP. A type of plant specific small GTPases, the ROPs are known to be involved in plant growth, development and immunity. We determined whether ROPs are conserved in Solanaceous species and whether they are involved in plant growth, development and resistance against Phytophthora capsisi. In genome-wide screening, a total of 66 ROPs in six Solanaceous species (SolROPs) were identified, including 16 ROPs in Solarium tuberosum L. (potato), 9 in Solarium lycopersicum L. (tomato), 5 in Solanum melongena L. (eggplant), 9 in Capsicum annuum L. (pepper), 13 in Nicotiana benthamiana Domin and 14 in Nicotiana tabacum L. (tobacco). Phylogenetic analysis revealed that 11 AtROPs and 66 SolROPs fall into five distinct clades (I-V) and hence a novel and systematic gene nomenclature was proposed. In addition, a comprehensive expression analysis was performed by making use of an online database. This revealed that ROP genes are differentially expressed during plant growth and development. Moreover, gene expression of SlROP-II.1 in S. lycopersicum could be significantly induced by P. capsici. Subsequently, SlROP-II.1 and its homologues in N. benthamiana and C. annuum (NbROP-II.1 and CaROP-II.1) were selected for functional analysis using virus-induced gene silencing. Infection assays with P. capsici on silenced plants revealed that SlROP-II.1, NbROP-II.1 and CaROP-II.1 play a role in P. capsici resistance, suggesting conserved function of ROP-II Glade across different Solanaceous species. In addition, NbROP-II.1 is also involved in regulating plant growth and development. This study signified the diversity of Solanaceous ROPs and their potential roles in plant growth, development and immunity.
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