期刊
POSTHARVEST BIOLOGY AND TECHNOLOGY
卷 75, 期 -, 页码 28-36出版社
ELSEVIER
DOI: 10.1016/j.postharvbio.2012.07.008
关键词
SIERF1; Gene overexpression; Plant pathogenesis; Resistance to fungi; Rhizopus nigricans
资金
- National Natural Science Foundation of China [NSFC 30270934, 30972037]
- Doctor Innovation Project of China Agricultural University [2012YJ082]
The tomato SIERF1 gene belongs to a distinct subfamily of the large ERF gene family. It is a downstream component in the ethylene signaling pathway in tomato, and is involved in plant defense and stress responses. Overexpression of the SIERF1 gene (SIERF1-OEs) in tomato dramatically enhanced the resistance of fruit to Rhizopus nigricans. In attempt to elucidate the mechanism basis of this observation, our study revealed a dual modulation. Firstly. SIERF1-OEs fruit showed a remarkable transcript accumulation of PR5 and PAL genes before infection with R. nigricans, which was not observed in wild-type (WT) fruit. Secondly. SIERF1-OEs fruit had higher activitiers of phenylalanine ammonia Iyase (PAL) and chitinase (CHI) in response to the fungal stress. These results show that SIERF1 positively modulated the ethylene-dependent pathogenesis defense pathway in tomato. That may be one of the mechanisms by which ERFs enhance plant tolerance to fungal invasion. (c) 2012 Elsevier B.V. All rights reserved.
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