The physiological cold tolerance of warm-climate plants is correlated with their latitudinal range limit
The physiological cold tolerance of warm-climate plants is correlated with their latitudinal range limit
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温暖气候植物的生理耐寒性与其纬度范围限制相关
DOI：
10.1098/rsbl.2018.0277
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发表时间：
2018-08
期刊：
影响因子：
3.3
通讯作者：
Cao Kun-fang
中科院分区：
文献类型：
--
作者：
Wen Yin;Qin De-wen;Leng Bing;Zhu Yun-fei;Cao Kun-fang
植物正在向极地和向上移动，以应对气候变暖。然而，由于许多原因，这类运动落后于不断扩大的变暖锋面，包括异常寒冷事件导致的植物运动受阻。在中国的南亚热带地区(南宁)，我们测定了101种暖气候被子植物的光系统II的最大光化学效率(Fv/Fm)，以评估它们在49天的严寒期结束时的耐寒性。我们发现，在101种植物中，有36种遭受冷害，黎明前的Fv/Fm值小于0.7。黎明前的Fv/Fm与物种的北纬极限之间存在显著的指数关系，纬度极限越低的物种受害越多。我们的结果表明，温暖气候植物的活动范围可能受到它们对低温的生理敏感性的影响，它们的极地运动可能会受到极端寒冷事件的阻碍。Fv/Fm的快速测量有助于评估植物的耐寒性，为模拟气候变化条件下物种范围的变化以及园艺管理和城市景观设计的物种选择提供有价值的信息。
Plants are moving poleward and upward in response to climate warming. However, such movements lag behind the expanding warming front for many reasons, including the impediment of plant movement caused by unusual cold events. In this study, we measured the maximum photochemical efficiency of photosystem II (Fv/Fm) in 101 warm-climate angiosperm species to assess their cold tolerance at the end of a severe chilling period of 49 days in a southern subtropical region (Nanning) in China. We found that 36 of the 101 species suffered from chilling-induced physiological injury, with predawn Fv/Fm values of less than 0.7. There was a significant exponential relationship between the predawn Fv/Fm and northern latitudinal limit of a species; species with a lower latitudinal limit suffered more. Our results suggest that the range limits of warm-climate plants are potentially influenced by their physiological sensitivity to chilling temperatures and that their poleward movement might be impeded by extreme cold events. The quick measurement of Fv/Fm is useful for assessing the cold tolerance of plants, providing valuable information for modelling species range shifts under changing climate conditions and species selection for horticultural management and urban landscape design.
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影响因子：
4.4
作者：
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通讯作者：
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影响因子：
5.2
作者：
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通讯作者：
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影响因子：
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影响因子：
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DOI：
10.1098/rstb.2010.0293
发表时间：
2010-11-27
影响因子：
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作者：
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通讯作者：
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