Abstract:
:Calcium-dependent protein kinases (CDPKs) are crucial sensors of calcium concentration changes in plant cells under diverse endogenous and environmental stimuli. We identified 20 CDPK genes from bread wheat and performed a comprehensive study on their structural, functional and evolutionary characteristics. Full-length cDNA sequences of 14 CDPKs were obtained using various approaches. Wheat CDPKs were found to be similar to their counterparts in rice in genomic structure, GC content, subcellular localization, and subgroup classification. Divergence time estimation of wheat CDPK gene pairs and wheat-rice orthologs suggested that most duplicated genes already existed in the common ancestor of wheat and rice. The number of CDPKs in diploid wheat genome was estimated to be at least 26, a number close to that in rice, Arabidopsis, and poplar. However, polymorphism among EST sequences uncovered transcripts of all three homoeologous alleles for 13 out of 20 CDPKs. Thus, the hexaploid wheat should have 2-3 fold more CDPK genes expressing in their cells than the diploid species. Wheat CDPK genes were found to respond to various biotic and abiotic stimuli, including cold, hydrogen peroxide (H(2)O(2)), salt, drought, powdery mildew (Blumeria graminis tritici, Bgt), as well as phytohormones abscisic acid (ABA) and gibberellic acid (GA). Each CDPK gene often responded to multiple treatments, suggesting that wheat CDPKs are converging points for multiple signal transduction pathways. The current work represents the first comprehensive study of CDPK genes in bread wheat and provides a foundation for further functional study of this important gene family in Triticeae.
journal_name
Plant Mol Bioljournal_title
Plant molecular biologyauthors
Li AL,Zhu YF,Tan XM,Wang X,Wei B,Guo HZ,Zhang ZL,Chen XB,Zhao GY,Kong XY,Jia JZ,Mao Ldoi
10.1007/s11103-007-9281-5subject
Has Abstractpub_date
2008-03-01 00:00:00pages
429-43issue
4eissn
0167-4412issn
1573-5028journal_volume
66pub_type
杂志文章abstract::The High Mobility Group (HMG) proteins of vertebrate animals have been the subject of intensive study because of evidence that they may be structural proteins of transcriptionally active chromatin. Organisms other than vertebrate animals have chromatin proteins which meet the operational criteria of salt extractabilit...
journal_title:Plant molecular biology
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