Effect of growth conditions on isoprene emission and other thermotolerance-enhancing compounds
Effect of growth conditions on isoprene emission and other thermotolerance-enhancing compounds
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DOI：
10.1046/j.1365-3040.2001.00744.x
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发表时间：
2001-09-01
影响因子：
7.3
通讯作者：
Sharkey, TD
中科院分区：
文献类型：
--
作者：
Hanson, DT;Sharkey, TD
异戊二烯是由许多植物的叶子以光依赖和温度敏感的方式释放出来的。植物以异戊二烯的形式损失了很大一部分光同化碳，但可能受益于高温事件后光合作用的改善恢复。植物在自然条件下排放异戊二烯的能力（以标准条件下的异戊二烯排放率评估）随天气而变化。采用温控温室研究了温度和光照对橡树叶合成异戊二烯能力的影响。在两种生长温度和两种生长光强下，比较了异戊二烯的释放能力和其他化合物的积累，表明了光合作用耐热性的提高。结果表明，高温或强光均能提高异戊二烯的发射能力。叶黄素循环中间产物在高温条件下增加，而在高温条件下没有增加，叶绿体小热激蛋白在任何生长条件下都没有表达。因此，在所研究的三种增强耐热性的化合物中，异戊二烯是唯一一种在本研究中被温度诱导的化合物。
Isoprene is emitted from the leaves of many plants in a light-dependent and temperature-sensitive manner. Plants lose a large fraction of photo-assimilated carbon as isoprene but may benefit from improved recovery of photosynthesis following high-temperature episodes. The capacity for isoprene emission of plants in natural conditions (assessed as the rate of isoprene emission under standard conditions) varies with weather. Temperature-controlled greenhouses were used to study the role of temperature and light in influencing the capacity of oak leaves for isoprene synthesis. A comparison was made between the capacity for isoprene emission and the accumulation of other compounds suggested to increase thermotolerance of photosynthesis under two growth temperatures and two growth light intensities. It was found that the capacity for isoprene emission was increased by high temperature or high light. Xanthophyll cycle intermediates increased in high fight, but not in high temperature, and the chloroplast small heat-shock protein was not expressed in any of the growth conditions. Thus, of the three thermotolerance-enhancing compounds studied, isoprene was the only one induced by the temperature used in this study.