Systemic signaling and acclimation in response to excess excitation energy in Arabidopsis
Systemic signaling and acclimation in response to excess excitation energy in Arabidopsis
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DOI：
10.1126/science.284.5414.654
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发表时间：
1999-04-23
期刊：
影响因子：
56.9
通讯作者：
Mullineaux, P
中科院分区：
文献类型：
--
作者：
Karpinski, S;Reynolds, H;Mullineaux, P
陆地植物是固着的，并且已经发展出复杂的机制，允许对不断变化的环境做出即时和非适应性的反应。部分弱光适应的拟南芥植物暴露在过量的光下，导致系统适应过量的激发能量，从而导致未暴露的叶片中的光氧化胁迫。因此，植物拥有一种系统地传递过剩激发能量的机制，使它们能够针对进一步的这种逆境建立防御。光系统II、过氧化氢附近的系统氧化还原变化和抗氧化防御的诱导是这种系统获得性习服机制的关键决定因素。
Land plants are sessile and have developed sophisticated mechanisms that allow for both immediate and-acclimatory responses to changing environments. Partial exposure of Low light-adapted Arabidopsis plants to excess light results in a systemic acclimation to excess excitation energy and consequent photooxidative stress in unexposed leaves. Thus, plants possess a mechanism to communicate excess excitation energy systemically, allowing them to mount a defense against further episodes of such stress. Systemic redox changes in the proximity of photosystem II, hydrogen peroxide, and the induction of antioxidant defenses are key determinants of this mechanism of systemic acquired acclimation.