The sensitivity of ginkgo leaf unfolding to the temperature and photoperiod decreases with increasing elevation
The sensitivity of ginkgo leaf unfolding to the temperature and photoperiod decreases with increasing elevation
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银杏叶展开对温度和光周期的敏感性随海拔升高而降低
DOI：
10.1016/j.agrformet.2022.108840
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发表时间：
2022-03
影响因子：
6.2
通讯作者：
Yongshuo Fu
中科院分区：
文献类型：
--
作者：
Zhaofei Wu;Chen-Feng Lin;Shuxin Wang;Yufeng Gong;Yun-Peng Zhao;Jing Tang;Hans J. De Boeck;Yan Vitasse;Yongshuo Fu
气候变化极大地影响了植物物候，导致温带和寒带地区植被开始时间提前。气候变暖引起的物候变化可能会因物种特异性反应而改变物种间营养水平的相互作用，如果两性对气候变暖的物候敏感性不同，则会影响雌雄异株物种的繁殖成功。本研究以中国东部天目山三个海拔的银杏树雌雄枝条为研究对象。在气候室中培养枝条，以确定三种温度（10、15和20°C）和两个光周期（8和16 h）的影响。我们观察到雄枝的叶片展开时间略早（1天），而雌枝的叶片展开所需的热量（生长度小时）（14,334±588°C）高于雄枝（13,874±551°C）。两性对温度（ST= 3.7天°C−1）、光周期和海拔的反应相似。长光周期处理使叶片展开的时间缩短了9.1 d，但温度和光周期对叶片展开的影响因供体海拔的不同而有显著差异。其中，最低海拔的温度（4.17 days°C−1）高于高海拔（3.26 days°C−1，降低0.48 days°C−1），光周期效应在最低海拔的温度（降低1.15 days°C−1）更大。这可能与高海拔地区树木为避免霜冻而产生的环境诱导的局部适应和自我保护机制有关。结果表明，光照周期和对环境的遗传适应影响了银杏的物候响应，但这些响应在两性之间基本相似。对于一个给定的物种，不同气候条件下的个体可能对更高的温度表现出不同的物候反应，随着气候进一步变暖，温暖地区的个体可能越来越受到光周期的限制。
Climate change substantially affects plant phenology, resulting in earlier vegetation onset across temperate and boreal regions. Phenological shifts caused by warming may alter species interactions across trophic levels because of species-specific responses, and influence the reproductive success of dioecious species if the phenological sensitivity to warming (ST) differs between genders. We used twigs collected from male and female gingko trees at three elevations on Tianmu Mountain in eastern China. The twigs were cultivated in climate chambers to determine the effects of three temperatures (10, 15, and 20 °C) and two photoperiods (8 and 16 h). We observed slightly earlier leaf unfolding dates in male twigs (1 day), and a higher heat requirement (growing degree hours) for leaf unfolding in female (14,334 ± 588 °C) compared to male twigs (13,874 ± 551 °C). Similar responses to temperature (ST= 3.7 days °C−1), photoperiod and elevation were observed across genders. The long photoperiod treatment shortened the time to leaf unfolding by 9.1 days, but temperature and photoperiod effects on leaf unfolding differed significantly depending on the elevation of the donor trees. Specifically,STwas higher (4.17 days °C−1) and the photoperiod effect onSTwas larger (decreased by 1.15 days °C−1) at the lowest elevation than at the higher elevations (ST= 3.26 days °C−1; decreased by 0.48 days °C−1). This may be related to environment-induced local adaptations and self-protection mechanisms of trees at high elevations to avoid frost damage. Our results indicate that the photoperiod and genetic adaptations to local environments influenced the warming-induced phenological responses in ginkgo, but these responses were generally similar between the genders. For a given species, individuals in different climates may exhibit different phenological responses to higher temperatures, with individuals in warmer regions likely becoming increasingly limited by the photoperiod as the climate warms further.
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影响因子：
4.1
作者：
Zhaofei Wu;Zhonghui Zhang;Juan Wang
通讯作者：
Zhaofei Wu;Zhonghui Zhang;Juan Wang
冬春季变暖导致青藏高原春季物候延迟
DOI：
10.1073/pnas.1012490107
发表时间：
2010-11
影响因子：
11.1
作者：
Haiying Yu;Eike Luedeling;Jianchu Xu
通讯作者：
Jianchu Xu
影响因子：
11.6
作者：
Fu, Yongshuo H.;Piao, Shilong;Janssens, Ivan A.
通讯作者：
Janssens, Ivan A.
影响因子：
6.2
作者：
Vitasse, Yann;Delzon, Sylvain;Michalet, Richard
通讯作者：
Michalet, Richard
影响因子：
11.6
作者：
Tao Wang;C. Ottlé;S. Peng;I. Janssens;Xin Lin;B. Poulter;C. Yue;P. Ciais
通讯作者：
Tao Wang;C. Ottlé;S. Peng;I. Janssens;Xin Lin;B. Poulter;C. Yue;P. Ciais