Natural variation in the regulation of leaf senescence and relation to other traits in Arabidopsis
Natural variation in the regulation of leaf senescence and relation to other traits in Arabidopsis
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DOI：
10.1111/j.1365-3040.2004.01266.x
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发表时间：
2005-02-01
影响因子：
7.3
通讯作者：
Wingler, A
中科院分区：
文献类型：
--
作者：
Levey, S;Wingler, A
叶片衰老导致营养物质的再循环，从而提供生长和繁殖所需的资源。在这项研究中，在8个不同的生态型拟南芥叶片衰老的影响，光长和衰老与其他形态和生活史性状之间的关系进行了分析。叶片衰老的开始和程度取决于遗传背景和对日照长度的反应，发现一个显着的变化，而衰老的早花生态型被长日照加速，没有日照长度对衰老的影响，可以发现在晚花Kas-1植物。不同生态类型的衰老与其他性状，如花的转变，果实总数，叶片总数和叶绿素含量最大值。早抽薹的植物也会早衰老，产生更少的叶子，积累更少的叶绿素，但产生更多的果实。目前的研究结果表明，衰老可能是光合能力和繁殖投资之间的权衡的关键组成部分。衰老和其他性状之间的关系保持独立的衰老的差异是否是由遗传（生态型）或环境（日长）的变化，这表明遗传和环境因素影响这些性状通过共同的调控途径。
Leaf senescence results in the recycling of nutrients, thereby providing resources required for growth and reproduction. In this study, the effect of day-length on leaf senescence in eight different Arabidopsis thaliana ecotypes was determined and the relationship between senescence and other morphological and life history traits was analysed. A significant variation in the start and extent of leaf senescence depending on the genetic background and the response to day-length was found. Whereas senescence of early flowering ecotypes was accelerated by long days, no effect of day-length on senescence could be found in late flowering Kas-1 plants. Senescence in the different ecotypes was associated with other traits, such as floral transition, the total number of fruits, the total number of leaves and the maximum chlorophyll content. Plants that bolted early also senesced early, produced fewer leaves, accumulated less chlorophyll, but produced more fruits. The present results indicate that senescence may be a key component in the trade-off between investment in photosynthetic capacity and reproduction. The relationship between senescence and other traits was maintained independent of whether differences in senescence were caused by genetic (ecotype) or environmental (day-length) variation, suggesting that genetic and environmental factors affect these traits through common regulatory pathways.