Elucidation of the GAUT gene family in eight Rosaceae species and function analysis of PbrGAUT22 in pear pollen tube growth
文献类型： 外文期刊
作者： Cai, Yiling 1 ; Tang, Chao 1 ; Lv, Shouzheng 1 ; Chen, Qiming 1 ; Zhu, Xiaoxuan 1 ; Li, Xian 1 ; Qi, Kaijie 1 ; Xie, Zhihua 1 ; Zhang, Shaoling 1 ; Wang, Peng 1 ; Wu, Juyou 1 ;
作者机构： 1.Nanjing Agr Univ, Sanya Inst, State Key Lab Crop Genet & Germplasm Enhancement, Nanjing 210095, Peoples R China
2.Jiangsu Key Lab Hort Crop Genet Improvement, Nanjing 210014, Peoples R China
3.Hainan Yazhou Bay Seed Lab, Sanya 572024, Peoples R China
关键词： Cell wall; Homogalacturonan; Galacturonosyltransferase; Pear; Pollen tube
期刊名称：PLANTA （ 2022影响因子：4.3； 五年影响因子：4.8 ）
ISSN： 0032-0935
年卷期： 2023 年 257 卷 4 期
收录情况： SCI
摘要： Main conclusionThe phylogenetic relationship and evolutionary history of the GAUT gene family were identified in 8 Rosaseae species. PbrGAUT22 was involved in controlling pollen tube growth by regulating the content of pectins.In plants, galacturonosyltransferases (GAUTs) were involved in homogalacturonan biosynthesis and functioned in maintaining pollen tube cell wall integrity. However, the feature and evolutionary history of the GAUT gene family in Rosaceae species and candidates in pear pollen tube growth remain unclear. Here, we identified 190 GAUT genes in 8 Rosaceae species, including Chinese white pear (Pyrus bretschneideri), European pear (Pyrus communis), apple (Malus x domestica), peach (Prunus persica), Japanese apricot (Prunus mume), sweet cherry (Prunus avium), woodland strawberry (Fragaria vesca) and black raspberry (Rubus occidentalis). Members in GAUT gene family were divided into 4 subfamilies according to the phylogenetic and structural analysis. Whole-genome duplication events and dispersed duplicates drove the expansion of the GAUT gene family. Among 23 pollen-expressed PbrGAUT genes in pear, PbrGAUT22 showed increased expression level during 1-6 h post-cultured pollen tubes. PbrGAUT22 was localized to the cytoplasm and plasma membrane. Knockdown of PbrGAUT22 expression in pollen tubes caused the decrease of pectin content and inhibited pear pollen tubes growth. Taken together, we investigated the identification and evolution of the GAUT gene family in Rosaceae species, and found that PbrGAUT22 played an essential role in the synthesis of pectin and the growth of pear pollen tubes.
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