ISHS Acta Horticulturae 1297: XXX International Horticultural Congress IHC2018: V International Symposium on Plant Genetic Resources and International Symposium on Applied Functional Molecular Biology
Ethylene suppresses anthocyanin accumulation in 'Red Zaosu' pear |
| Authors: | J.B. Ni, S.L. Bai, Y. Zhao, R.Y. Tao, Y.W. Teng |
| Keywords: | anthocyanin, ethylene, 1-MCP, ERF, pear |
| DOI: | 10.17660/ActaHortic.2020.1297.67 |
| Abstract:
Plant hormones play a crucial role in the regulation of fruit color formation. In this study, light-induced anthocyanin synthesis in postharvest fruit of 'Red Zaosu' pear (a hybrid of Pyrus pyrifolia Nakai and Pyrus communis L.) was inhibited by ethylene and promoted by the ethylene receptor inhibitor 1-methylcyclopropene (1-MCP), which is opposite to that in apple, strawberry and some other fruits. qPCR analysis showed that expression of most structural genes in anthocyanin biosynthesis pathway of 'Red Zaosu', such as PpCHS, PpCHI, PpF3H, PpDFR and PpUFGT, as well as regulatory genes PpMYB10, PpMYB114, PpbHLH33, PpbHLH3 and PpWD40 was significantly upregulated by 1-MCP treatment, while downregulated by ethephon treatment. Furthermore, the transcription pattern of all the ERFs in pear, important transcription factors in ethylene signaling pathway, was analyzed. A total of 21 ERFs were identified to be correlated with anthocyanin content, of which 15 ERFs negatively responded to ethylene, while 6 ERFs with EAR motif positively responded to ethylene. However, the functions of these ERFs need to be further studied. | |
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