DIURNAL PATTERNS OF HEAT TOLERANCE IN RELATION TO CAM
DIURNAL PATTERNS OF HEAT TOLERANCE IN RELATION TO CAM
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DOI：
10.1016/s0044-328x(84)80082-3
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发表时间：
1984-01-01
期刊：
影响因子：
--
通讯作者：
LOSCH, R
中科院分区：
文献类型：
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作者：
KAPPEN, L;LOSCH, R
CAM（景天酸代谢）植物 Aeium haworthii 和 C3 植物 Aichryson laxum 的耐热性在一天中发生显着变化，这两种植物均来自特内里费岛（加那利群岛）的长寿命植物。荷花的耐热温度范围在39℃至39℃之间。和 46.5 度。 C、Aichryson laxum 之间的温度为 43°C。和46度。 C.在12:12小时的光周期，10°C。 C 黑暗中，25°C C在光照下，耐热性在黑暗阶段达到最小值，在光照阶段达到最大值。当明暗顺序颠倒时也是如此。耐热循环似乎是由光周期和温度以及与温度相关的最大水平引起的。耐热性的昼夜过程几乎与组织酸积累正好相反，并且高酸度水平可能会对耐热性产生负面影响。对酸度作用的生理学的进一步研究可以为耐热机制提供新的见解。
Heat tolerance changed markedly during the course of the day in the CAM [crassolacean acid metabolism] plant Aeonium haworthii and the C3 plant Aichryson laxum, both Sempervivoidea from the island of Tenerife [Canary Islands]. The temperature limits of heat tolerance of Aeonium haworthii varied between 39.degree. and 46.5.degree. C, and of Aichryson laxum between 43.degree. and 46.degree. C. In a 12:12 h photoperiod, 10.degree. C in dark, 25.degree. C in light, the heat tolerance reached a minimum during the dark phase and a maximum in the light phase. This was also the case when the light-dark sequence was inverted. The heat tolerance cycle appears to be induced by photoperiod and temperature, and maximum levels related to temperature. The diurnal course of heat tolerance is almost the exact inverse of tissue acid accumulation and it appears that high acidity levels may negatively affect heat tolerance. Further investigations into the physiology of the actions of the acidity could provide new insight into the mechanism of heat tolerance.