Growth response and acclimation of CO2 exchange characteristics to elevated temperatures in tropical tree seedlings.
Growth response and acclimation of CO2 exchange characteristics to elevated temperatures in tropical tree seedlings.
复制标题
DOI：
10.1093/jxb/ert211
复制
发表时间：
2013-09
影响因子：
6.9
通讯作者：
Winter K
中科院分区：
文献类型：
--
作者：
Cheesman AW;Winter K
由于缺乏热带物种在高温下生长情况的数据，对热带森林如何应对未来气候变化的预测受到限制。特别是，很少有人知道的潜力，热带物种的生理适应未来的温度上升。来自不同功能群的10个新热带树种的幼苗在受控环境室中培养，在30/22 °C和39/31 °C之间的4个昼夜温度制度下。在良好的浇水条件下，所有物种都在高于目前在其原生范围内发现的温度下表现出最佳生长。虽然非先驱物种在所采用的最高温度制度（即每日平均35 °C）下经历了灾难性的失败或增长率大幅下降，但三个低地先驱物种的增长率仅略有下降。在随后的实验中，将三个物种（Ficus insipida、Ormosia macrocalyx和Ochroma dichlorale）在确定为亚最佳和超最佳生长的两个温度下培养，但尽管生长温度相差6°C，但这导致相似的生物质积累。通过相互传递和温度调节，研究了热锻炼对光合作用和呼吸作用的影响。驯化潜力各不相同的物种，有两种不同的呼吸驯化模式。这项研究强调了内在的温度耐受性和热适应在确定热带树种科普温度升高的能力方面的作用。
Predictions of how tropical forests will respond to future climate change are constrained by the paucity of data on the performance of tropical species under elevated growth temperatures. In particular, little is known about the potential of tropical species to acclimate physiologically to future increases in temperature. Seedlings of 10 neo-tropical tree species from different functional groups were cultivated in controlled-environment chambers under four day/night temperature regimes between 30/22 °C and 39/31 °C. Under well-watered conditions, all species showed optimal growth at temperatures above those currently found in their native range. While non-pioneer species experienced catastrophic failure or a substantially reduced growth rate under the highest temperature regime employed (i.e. daily average of 35 °C), growth in three lowland pioneers showed only a marginal reduction. In a subsequent experiment, three species (Ficus insipida, Ormosia macrocalyx, and Ochroma pyramidale) were cultivated at two temperatures determined as sub- and superoptimal for growth, but which resulted in similar biomass accumulation despite a 6°C difference in growth temperature. Through reciprocal transfer and temperature adjustment, the role of thermal acclimation in photosynthesis and respiration was investigated. Acclimation potential varied among species, with two distinct patterns of respiration acclimation identified. The study highlights the role of both inherent temperature tolerance and thermal acclimation in determining the ability of tropical tree species to cope with enhanced temperatures.
登录
查看更多内容
影响因子：
56.9
作者：
Chen, I-Ching;Hill, Jane K.;Thomas, Chris D.
通讯作者：
Thomas, Chris D.
影响因子：
6.7
作者：
Booth, Ben B. B.;Jones, Chris D.;Lloyd, Jon
通讯作者：
Lloyd, Jon
影响因子：
2.7
作者：
Cordell, S;Goldstein, G;Vitousek, PM
通讯作者：
Vitousek, PM
影响因子：
4.2
作者：
Blackman, VH
通讯作者：
Blackman, VH
影响因子：
11.6
作者：
Feeley, Kenneth J.;Silman, Miles R.
通讯作者：
Silman, Miles R.