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Profiling gene expression in citrus fruit calyx abscission zone (AZ-C) treated with ethylene

文献类型： 外文期刊

作者： Cheng, Chunzhen 1 ; Zhang, Lingyun 3 ; Yang, Xuelian 4 ; Zhong, Guangyan 1 ;

作者机构： 1.Guangdong Acad Agr Sci, Inst Fruit Tree Res, Guangzhou 510640, Guangdong, Peoples R China

2.Southwest Univ, Coll Hort & Landscape Architecture, Chongqing 400715, Peoples R China

3.Guizhou Normal Univ, Sch Geog & Environm Sci, Guiyang 550001, Guizhou, Peoples R China

4.Guizhou Univ, Coll Agr, Guiyang 550025, Guizhou, Peoples R China

5.Minist Agr, Key Lab South Subtrop Fruit Biol & Genet Resource, Guangzhou 510640, Guangdong, Peoples R China

6.Key Lab Trop & Subtrop Fruit Tree Res, Guangzhou 510640, Guangdong, Peoples R China

关键词： Ethylene;Abscission;Mature citrus fruit;Calyx abscission zone (AZ-C);Microarray

期刊名称：MOLECULAR GENETICS AND GENOMICS （ 影响因子：3.291； 五年影响因子：3.257 ）

ISSN：

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收录情况： SCI

摘要： On-tree storage and harvesting of mature fruit account for a large proportion of cost in the production of citrus, and a reduction of the cost would not be achieved without a thorough understanding of the mechani sm of the mature fruit abscission. Genome-wide gene expression changes in ethylene-treated fruit calyx abscission zone (AZ-C) of Citrus sinensis cv. Olinda were therefore investigated using a citrus genome array representing up to 33,879 citrus transcripts. In total, 1313 and 1044 differentially regulated genes were identified in AZ-C treated with ethylene for 4 and 24 h, respectively. The results showed that mature citrus fruit abscission commenced with the activation of ethylene signal transduction pathway that led to the activation of ethylene responsive transcription factors and the subsequent transcriptional regulation of a large set of ethylene responsive genes. Significantly down-regulated genes included those of starch/sugar biosynthesis, transportation of water and growth promoting hormone synthesis and signaling, whereas significantly up-regulated genes were those involved in defense, cell wall degradation, and secondary metabolism. Our data unraveled the underlying mechanisms of some known important biochemical events occurring at AZ-C and should provide informative suggestions for future manipulation of the events to achieve a controllable abscission for mature citrus fruit.

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