Genome-wide analysis and characterization of Aux/IAA family genes related to fruit ripening in papaya (Carica papaya L.)

BMC Genomics

Research Article

Chenjia Shen¹  Haili Li²  Kaidong Liu²  Shuting Zhong²  Changchun Yuan²  Shaoxian Feng²  Jinxiang Liu²  Jundi Zhong² 

[1] College of Life and Environmental Science, Hangzhou Normal University, 310036, Hangzhou, China;Life Science and Technology School, Lingnan Normal University, 524048, Zhanjiang, Guangdong, China;

关键词: Auxin;    Aux/IAA family;    Papaya;    Expression profile;    Fruit ripening;   

DOI  :  10.1186/s12864-017-3722-6

 received in 2016-07-09, accepted in 2017-04-25,  发布年份 2017

来源: Springer

【 摘 要 】

BackgroundAuxin/indole-3-acetic acid (Aux/IAA) family genes encode short-lived nuclear proteins that mediate the responses of auxin-related genes and are involved in several plant developmental and growth processes. However, how Aux/IAA genes function in the fruit development and ripening of papaya (Carica papaya L.) is largely unknown.ResultsIn this study, a comprehensive identification and a distinctive expression analysis of 18 C. papaya Aux/IAA (CpIAA) genes were performed using newly updated papaya reference genome data. The Aux/IAA gene family in papaya is slightly smaller than that in Arabidopsis, but all of the phylogenetic subfamilies are represented. Most of the CpIAA genes are responsive to various phytohormones and expressed in a tissues-specific manner. To understand the putative biological functions of the CpIAA genes involved in fruit development and ripening, quantitative real-time PCR was used to test the expression profiling of CpIAA genes at different stages. Furthermore, an IAA treatment significantly delayed the ripening process in papaya fruit at the early stages. The expression changes of CpIAA genes in ACC and 1-MCP treatments suggested a crosstalk between auxin and ethylene during the fruit ripening process of papaya.ConclusionsOur study provided comprehensive information on the Aux/IAA family in papaya, including gene structures, phylogenetic relationships and expression profiles. The involvement of CpIAA gene expression changes in fruit development and ripening gives us an opportunity to understand the roles of auxin signaling in the maturation of papaya reproductive organs.

【 授权许可】

CC BY   
© The Author(s). 2017