The Relationship between the Expression of Ethylene-Related Genes and Papaya Fruit Ripening Disorder Caused by Chilling Injury

• DOI: 10.1371/journal.pone.0116002
• Publication Date: 2014-12-26T19:32:05Z
• Authors: Yuan Zou; Lin Zhang; Shen Rao; Xiaoyang Zhu; Lanlan Ye; Weixin Chen; Xueping Li
• Keywords: Carica

Papaya (Carica papaya L.) is sensitive to low temperature and easy be subjected chilling injury, which causes fruit ripening disorder. This study aimed investigate the relationship between expression of genes related ethylene disorder caused by injury. fruits were firstly stored at 7°C 12°C for 25 30 days, respectively, then treated with exogenous followed 25°C 5 days. Chilling injury symptoms such as pulp water soaking observed in on 20 whereas coloration softening completely blocked after Large differences changes levels twenty two involved seen during 7°C-storage Those altered could divided into three groups: group that up-regulated, including ACS1/2/3, EIN2, EIN3s/EIL1, CTR1/2/3, ERF1/3/4; down-regulated, ACO3, ETR1, CTR4, EBF2, ERF2; un-regulated, ACO1/2, ERS, EBF1. The results also showed firmness had a significantly positive correlation ACS2, ACO1, CTR1/4, EIN3a/b, EBF1/2 without was changed negative one storage days coloring index displayed correlations ERF3 but these ones All together, indicate may play important roles abnormal papaya.