期刊
PLANT CELL AND ENVIRONMENT
卷 36, 期 5, 页码 936-944出版社
WILEY
DOI: 10.1111/pce.12026
关键词
stomata; temperature; transpiration; water potential
资金
- Direct For Biological Sciences
- Division Of Integrative Organismal Systems [1122003] Funding Source: National Science Foundation
This study tests two predictions from a recently proposed model for stomatal responses to humidity and temperature. The model is based on water potential equilibrium between the guard cells and the air at the bottom of the stomatal pore and contains three independent variables: gs0, Z and . gs0 is the value of stomatal conductance that would occur at saturating humidity and will vary among leaves and with CO2 and light. The value of Z is determined primarily by the resistance to heat transfer from the epidermis to the evaporating site and the value of is determined primarily by the resistance to water vapour diffusion from the evaporating site to the guard cells. This leads to the two predictions that were tested. Firstly, the values of Z and should be constant for leaves of a given species grown under given conditions, although gs0 should vary among leaves and with light and CO2. And secondly, the ratio of Z to should be higher in leaves having their stomata in crypts because the distance for heat transfer is greater than that for water vapour diffusion. Data from three species, Nerium oleander, Pastinaca sativum and Xanthium strumarium support these two predictions.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据