Salt-responsive genes in rice revealed by cDNA microarray analysis

Dai Yin CHAO; Yong Hai LUO; Min SHIDa LUOHong Xuan LIN

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Salt-responsive genes in rice revealed by cDNA microarray analysis

机译：Salt-responsive genes in rice revealed by cDNA microarray analysis

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We used cDNA microarrays containing -9,000 unigenes to identify 486 salt responsive expressed sequence tags (ESTs) (representing -450 unigenes) in shoots of the highly salt-tolerant rice variety, Nona Bokra (Oryza sativa L. ssp. Indica pv. Nona). Someof the genes identified in this study had previously been associated with salt stress. However the majority were novel, indicating that there is a great number of genes that are induced by salt exposure. Analysis of the salt stress expression profile data of Nona provided clues regarding some putative cellular and molecular processes that are undertaken by this tolerant rice variety in response to salt stress. Namely, we found that multiple transcription factors were induced during the initial salt response of shoots. Many genes whose encoded proteins are implicated in detoxification, protectant and transport were rapidly induced. Genes supporting photosynthesis were repressed and those supporting carbohydrate metabolism were altered. Commonality among the genes induced by salt exposure with those induced during senescence and biotic stress responses suggests that there are shared signaling pathways among these processes. We further compared the transcriptome changes of the salt-sensitive cultivar, IR28, with that of Nona rice. Many genes that are salt responsive in Nona were found to be differentially regulated in IR28. This study identified a large number of candidate functional genes that appear to be involved in salt tolerance and further examination of these genes may enable the molecular basis of salt tolerance to be elucidated.

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来源
《Cell research》 |2005年第10期|796-810|共15页
作者
Dai Yin CHAO; Yong Hai LUO; Min SHIDa LUOHong Xuan LIN;
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作者单位

National Key Laboratory of Plant Molecular Genetics, Shanghai Institute of Plant Physiology and Ecology, Shanghai Institutes for Biological Sciences, Chinese Academy of Sciences, 300 Fenglin Road, Shanghai 200032, China;

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收录信息美国《科学引文索引》(SCI);美国《化学文摘》(CA);
原文格式 PDF
正文语种英语
中图分类细胞生物学;
关键词
cDNA microarray; rice; salt stress; signaling crosstalk; transcriptome;

Salt-responsive genes in rice revealed by cDNA microarray analysis

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