Evolution and Functional Divergence of SUN Genes in Plants

• DOI: 10.3389/fpls.2021.646622
• Publication Date: 2021-03-08T06:39:06Z
• Authors: Li Yuan; Jingwen Pan; Shouhong Zhu; Yan Li; Jinbo Yao; Qiulin Li; Shengtao Fang; Chunyan Liu; Xinyu Wang; Bei Li; Wei Chen; Yongshan Zhang
• Keywords: Subfamily; Functional divergence; Suns in alchemy

SUN-domain containing proteins are crucial nuclear membrane involved in a plethora of biological functions, including meiosis, morphology, and embryonic development, but their evolutionary history functional divergence obscure. In all, 216 SUN from protists, fungi, plants were divided into two monophyletic clades (Cter-SUN Mid-SUN). We performed comprehensive analyses, investigating the characteristics different subfamilies plants. Mid-SUNs further evolved subgroups, SUN3 SUN5, before emergence ancestor angiosperms, while Cter-SUNs retained one subfamily SUN1. The distinct each other conserved residues domain, TM motif, exon/intron structures. gene losses occurred with equal frequency between these clades, duplication events more frequent. cotton, primarily expressed petals stamens moderately tissues, whereas SUN5 specifically mature pollen. Virus-induced knock-down CRISPR/Cas9-mediated knockout GbSUN5 both showed higher ratios aborted seeds, although pollen viability remained normal. Our results indicated function that plays an important role reproductive development.