Bioinformatics and Expression Pattern Analysis of Rice RR Gene Family
The rice response regulators(RR)family play important roles in plant growth and development,so it is important to explore the evolution and biological characteristics of the RR genes in rice.There were 22 RR genes in rice,including 15 A-type and 7 B-type genes.Analysis results showed that the rice RR proteins differed in their physicochemical properties,among which the B-type RRs were all hydrophilic proteins(GRAVY<0);homologous sequence analysis revealed that there were 5 paralogous gene pairs in the rice RR genes,namely,OsRR8 and OsRR15,OsRR5 and OsRR11,OsRR9 and OsRR10,OsRR1 and OsRR2,and OsRR20 and OsRR18,which were predicted to have similar functions with known functional genes;the conserved Motif 1 and Motif 3 both belonged to the REC superfamily,which acted as response regulators to receive signals from the two-component phosphotransferase system,and they distributed among 22 OsRR proteins.The analysis of regulatory elements and expression pattern revealed that RR genes had potential ability in the regulating hormone signals transduction such as abscisic acid,salicylic acid,jasmonic acid,gibberellin,and growth hormone,and participated in plant defense against stress such as low temperature,drought,and light and anaerobic signals response,and also involved in the the regulation of different developmental processes of rice etc.functions.The bioinformatics analysis of rice RR gene family provided a theoretical basis for the in-depth study of their functions,and layed the foundation for further revealing the growth,development,and signal transduction mechanisms of plant.
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