Karpinski S, Reynolds H, Karpinska B, Wingsle G, Creissen G, Mullineaux P
Department of Forest Genetics and Plant Physiology, Faculty of Forestry, Swedish University of Agricultural Sciences, SE-901 83 Umeâ, Sweden.
Science. 1999 Apr 23;284(5414):654-7. doi: 10.1126/science.284.5414.654.
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.
陆生植物固定生长，已进化出复杂的机制，使其能够对不断变化的环境做出即时和适应性反应。将适应弱光的拟南芥植株部分暴露于强光下，会导致其对过量激发能产生系统性适应，并使未暴露叶片随之遭受光氧化应激。因此，植物拥有一种机制来系统性地传递过量激发能，从而使其能够抵御此类应激的进一步发作。光系统II附近的系统性氧化还原变化、过氧化氢以及抗氧化防御的诱导是这种系统性获得性适应机制的关键决定因素。
