Coronatine-lnsensitive 1 （COI1） Mediates Transcriptional Responses of Arabidopsis thaliana to External Potassium Supply  

作　　者：Patrick Armengaud Rainer Breitling Anna Amtmann 

机构地区：[1]Faculty of Biomedical and Life Sciences, University of Glasgow, Glasgow G12 8QQ, UK [2]Present address: Institut National de la Recherche Agronomique, Unite de nutrition azotee des plantes, RD10, 78026 Versailles Cedex, France [3]Groningen Bioinformatics Centre, University of Groningen, Kerklaan 30, 9751 NN Haren, The Netherlands

出　　处：《Molecular Plant》2010年第2期390-405,共16页分子植物（英文版）

摘　　要：The ability to adjust growth and development to the availability of mineral nutrients in the soil is an essential life skill of plants but the underlying signaling pathways are poorly understood. In Arab/dops/s thal/ana, shortage of po- tassium （K） induces a number of genes related to the phytohormone jasmonic acid （JA）. Using comparative microarray analysis of wild-type and coi1-16 mutant plants, we classified transcriptional responses to K with respect to their depen- dence on COI1, a central component of oxylipin signaling. Expression profiles obtained in a short-term experiment clearly distinguished between COil-dependent and COil-independent K-responsive genes, and identified both known and novel targets of JA-COIl-signaling. During long-term K-deficiency, coi-16 mutants displayed de novo responses covering similar functions as COil-targets except for defense. A putative role of JA for enhancing the defense potential of K-deficient plants was further supported by the observation that plants grown on low K were less damaged by thrips than plants grown with sufficient K.The ability to adjust growth and development to the availability of mineral nutrients in the soil is an essential life skill of plants but the underlying signaling pathways are poorly understood. In Arab/dops/s thal/ana, shortage of po- tassium （K） induces a number of genes related to the phytohormone jasmonic acid （JA）. Using comparative microarray analysis of wild-type and coi1-16 mutant plants, we classified transcriptional responses to K with respect to their depen- dence on COI1, a central component of oxylipin signaling. Expression profiles obtained in a short-term experiment clearly distinguished between COil-dependent and COil-independent K-responsive genes, and identified both known and novel targets of JA-COIl-signaling. During long-term K-deficiency, coi-16 mutants displayed de novo responses covering similar functions as COil-targets except for defense. A putative role of JA for enhancing the defense potential of K-deficient plants was further supported by the observation that plants grown on low K were less damaged by thrips than plants grown with sufficient K.

关 键 词：Hormonal regulation NUTRITION secondary metabolism/natural products transcriptome analysis plantinsect interactions Arabidopsis. 

分 类 号：Q75[生物学—分子生物学] S836[农业科学—畜牧学]