首页|Genome-wide identification and expression profiling of photosystem Ⅱ(PsbX)gene family in upland cotton(Gossypium hirsutum L.)
Genome-wide identification and expression profiling of photosystem Ⅱ(PsbX)gene family in upland cotton(Gossypium hirsutum L.)
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国家科技期刊平台
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Background Photosystem Ⅱ(PSⅡ)constitutes an intricate assembly of protein pigments,featuring extrinsic and intrinsic polypeptides within the photosynthetic membrane.The low-molecular-weight transmembrane protein PsbX has been identified in PSⅡ,which is associated with the oxygen-evolving complex.The expression of PsbX gene protein is regulated by light.PsbX's central role involves the regulation of PSⅡ,facilitating the binding of quinone molecules to the Qb(PsbA)site,and it additionally plays a crucial role in optimizing the efficiency of photosynthesis.Despite these insights,a comprehensive understanding of the PsbX gene's functions has remained elusive.Results In this study,we identified ten PsbXgenes in Gossypium hirsutum L.The phylogenetic analysis results showed that 40 genes from nine species were classified into one clade.The resulting sequence logos exhibited substantial conservation across the N and C terminals at multiple sites among all Gossypium species.Furthermore,the ortholo-gous/paralogous,Ka/Ks ratio revealed that cotton PsbXgenes subjected to positive as well as purifying selection pressure might lead to limited divergence,which resulted in the whole genome and segmental duplication.The expression patterns of GhPsbX genes exhibited variations across specific tissues,as indicated by the analysis.Moreover,the expression of GhPsbXgenes could potentially be regulated in response to salt,intense light,and drought stresses.Therefore,GhPsbX genes may play a significant role in the modulation of photosynthesis under adverse abiotic conditions.Conclusion We examined the structure and function of PsbX gene family very first by using comparative genom-ics and systems biology approaches in cotton.It seems that PsbX gene family plays a vital role during the growth and development of cotton under stress conditions.Collectively,the results of this study provide basic information to unveil the molecular and physiological function of PsbX genes of cotton plants.
Institute of Cotton Research,Chinese Academy of Agricultural Sciences,National Key Laboratory of Cotton Bio-Breeding and Integrated Utilization,Anyang,Henan 455000,China
Department of Biotechnology and Genetic Engineering,Kohat University of Science and Technology,Kohat,Pakistan
Department of Botany,Kohat University of Science and Technology,Kohat,Pakistan
国家科技期刊平台
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