Correlations of photosynthetic heat tolerance with leaf morphology and temperature niche in Magnoliaceae
Year: 2023
Type: article
Abstract: AimsThe growth and survival of plants are being threatened by more frequent extreme high temperature events under global climate change.Therefore, for species conservation and adaptability prediction, it is essential to accurately evaluate the physiological heat tolerance across plant species.Magnoliaceae, as a typical basal angiosperm lineage, is one of the representative lineages in subtropical evergreen forests in China, with high ecological and evolutionary significance.However, the photosynthetic heat tolerance of Magnoliaceae plants is still unclear. MethodsIn this study, we used chlorophyll fluorescence method to exam the photosynthetic heat tolerance of 23 species of Magnolicaeae plants in a common garden.In order to analyze the relationships of photosynthetic heat tolerance with leaf morphology and temperature niche, for each species, we measured leaf morphological traits and calculated the temperature niche across their geographic distribution areas.Important findings The temperature that causes 50% decrease of the maximum photochemical quantum efficiency of photosystem II (T50) ranged from 46.1 to 56.7 °C, with significantly higher T50 of evergreen species than that of deciduous species.For leaf morphology, T50 was positively correlated with the leaf area but was not ©植物生态学报 Chinese Journal of Plant Ecology叶洁泓等: 木兰科植物叶片光合系统耐热性与叶片形态及温度生态位的关系 1433
Source: Chinese Journal of Plant Ecology
Authors: Jie-Hong YE, Cheng-Long YU, Shao-Fei ZHUO, Xin-Lan CHEN, Ke-Ming YANG, Yin WEN, Hui LIU, 3South China National Botanical Garden, Guangzhou 510520, China
Language: English
Subfield: Global and Planetary Change
Field: Environmental Science
Domain: Physical Sciences
Open Access status: diamond
OpenAlex ID: W4392669164