Coronatine-insensitive 1 (COI1) mediates transcriptional responses of Arabidopsis thaliana to external potassium supply.

Coronatine-insensitive 1 (COI1) mediates transcriptional responses of Arabidopsis thaliana to external potassium supply.
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DOI:
10.1093/mp/ssq012
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发表时间:
2010-03
期刊:
影响因子:
27.5
通讯作者:
Amtmann A
Amtmann A
中科院分区:
生物学1区
文献类型:
--
作者:
Armengaud P;Breitling R;Amtmann A

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调节生长和发育以适应土壤中矿物质营养的能力是植物的基本生命技能,但对潜在的信号通路知之甚少。在拟南芥中,钾(K)的缺乏诱导了许多与植物激素茉莉酸(JA)相关的基因。使用野生型和COI 1 -16突变体植物的比较微阵列分析,我们分类的转录响应K相对于他们的依赖COI 1,一个核心组成部分的oxlipin信号。在短期实验中获得的表达谱清楚地区分了COI 1依赖性和COI 1非依赖性K应答基因,并确定了JA-COI 1信号传导的已知和新靶点。在长期的K-缺乏,COI-16突变体显示从头反应,涵盖了类似的功能COI 1的目标,除了国防。JA在提高缺钾植物防御潜力方面的假定作用进一步得到了以下观察结果的支持:生长在低钾条件下的植物比生长在充足钾条件下的植物受蓟马的伤害更小。
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 Arabidopsis thaliana, shortage of potassium (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 dependence on COI1, a central component of oxylipin signaling. Expression profiles obtained in a short-term experiment clearly distinguished between COI1-dependent and COI1-independent K-responsive genes, and identified both known and novel targets of JA-COI1-signaling. During long-term K-deficiency, coi-16 mutants displayed de novo responses covering similar functions as COI1-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.
DOI: 10.1093/mp/ssn094
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影响因子: 27.5
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Amtmann, Anna
通讯作者: Amtmann, Anna
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向量分析是一种快速简便的方法,可以比较不同实验背景之间的基因表达反应。
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