Smaller, faster stomata: scaling of stomatal size, rate of response, and stomatal conductance.
Smaller, faster stomata: scaling of stomatal size, rate of response, and stomatal conductance.
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DOI：
10.1093/jxb/ers347
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发表时间：
2013-01
影响因子：
6.9
通讯作者：
Franks PJ
中科院分区：
文献类型：
--
作者：
Drake PL;Froend RH;Franks PJ
最大和最小气孔导度，以及气孔大小和响应速率，是众所周知的，在植物物种之间的差异很大，但这些静态和动态气孔属性之间的功能关系是未知的。本研究的目的是检验三个假设：（1）标准条件下的气孔导度（gop）与早晨光照前的最小气孔导度（gmin（dawn））相关，（2）气孔大小（S）与gop和气孔对光照的最大响应速率（dg/dt）max负相关，（3）气孔大小（S）与气孔对光照的最大响应速率（dg/dt）max负相关，（4）气孔大小（S）与气孔对光照的最大响应速率（dg/dt）max负相关。gop与瞬时水分利用效率（WUE）呈负相关，而与最大羧化速率（Vc max）和光饱和电子传递速率（J max）呈正相关。使用五个密切相关的物种Banksia，上述变量进行了测量，发现所有三个假设都得到了结果的支持。总的来说，这表明为更高的气体交换率而构建的叶子具有更小的气孔和更快的动态特性。气孔控制模型的帮助下，它表明，较高的gop可能会暴露植物较大的组织水势梯度，更快的气孔响应时间可以帮助抵消这种风险。
Maximum and minimum stomatal conductance, as well as stomatal size and rate of response, are known to vary widely across plant species, but the functional relationship between these static and dynamic stomatal properties is unknown. The objective of this study was to test three hypotheses: (i) operating stomatal conductance under standard conditions (g op) correlates with minimum stomatal conductance prior to morning light [g min(dawn)]; (ii) stomatal size (S) is negatively correlated with g op and the maximum rate of stomatal opening in response to light, (dg/dt)max; and (iii) g op correlates negatively with instantaneous water-use efficiency (WUE) despite positive correlations with maximum rate of carboxylation (Vc max) and light-saturated rate of electron transport (J max). Using five closely related species of the genus Banksia, the above variables were measured, and it was found that all three hypotheses were supported by the results. Overall, this indicates that leaves built for higher rates of gas exchange have smaller stomata and faster dynamic characteristics. With the aid of a stomatal control model, it is demonstrated that higher g op can potentially expose plants to larger tissue water potential gradients, and that faster stomatal response times can help offset this risk.
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影响因子：
7.4
作者：
CARDON, ZG;BERRY, JA;WOODROW, IE
通讯作者：
WOODROW, IE
影响因子：
7.3
作者：
ASSMANN, SM;GRANTZ, DA
通讯作者：
GRANTZ, DA
影响因子：
4
作者：
Daley, MJ;Phillips, NG
通讯作者：
Phillips, NG
DOI：
10.1071/pp00157
发表时间：
2001-01-01
期刊：
AUSTRALIAN JOURNAL OF PLANT PHYSIOLOGY
影响因子：
--
作者：
Aasamaa, K;Sober, A;Rahi, M
通讯作者：
Rahi, M
影响因子：
7.4
作者：
Franks, Peter J.;Farquhar, Graham D.
通讯作者：
Farquhar, Graham D.