期刊
GENE
卷 559, 期 2, 页码 129-136出版社
ELSEVIER
DOI: 10.1016/j.gene.2015.01.024
关键词
Heat shock factor; Ponkan; Heat stress; Fruit development
资金
- National Basic Research Program of China (973 program) [2011CB100602]
- Program of International Science and Technology Cooperation [2011DFB31580]
- National Key Technology Research and Development Program of the Ministry of Science and Technology of China [2012BAD38B03]
Heat shock transcription factors (Hsfs) play a role in plant responses to stress. Citrus is an economically important fruit whose genome has been fully sequenced. So far, no detailed characterization of the Hsf gene family is available for citrus. A genome-wide analysis was carried out in Citrus clementina to identify Hsf genes, named CcHsfs. Eighteen CcHsfs were identified and classified into three main clades (clades A, B and C) according to the structural characteristics and the phylogenetic comparison with Arabidopsis and tomato. MEME motif analysis highlighted the conserved DBD and HR-A/B domains, which were similar to Hsf protein structures in other species. Gene expression analysis in Ponkan (Citrus reticulata Blanco cv. Ponkan) fruit identified 14 Hsf genes, named CrHsf, as important candidates for a role in fruit development and ripening, and showed seven genes to be expressed in response to hot air stress. CrHsfB2a and CrHsfB5 were considered to be important regulators of citrate content and showed variation in both developmentally-related and hot air-triggered citrate degradation processes. In summary, the data obtained from this investigation provides the basis for further study to dissect Hsf function during fruit development as well as in response to heat stress and also emphasizes the potential importance of CrHsfs in regulation of citrate metabolism in citrus fruit (C) 2015 Elsevier B.V. All rights reserved.
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