涉及二氧化碳与气孔的反馈回路的增益：理论与测量
Gain of the feedback loop involving carbon dioxide and stomata: theory and measurement.
作者信息
Farquhar G D, Dubbe D R, Raschke K
机构信息
MSU-DOE Plant Research Laboratory, Michigan State University, East Lansing, Michigan 48824.
出版信息
Plant Physiol. 1978 Sep;62(3):406-12. doi: 10.1104/pp.62.3.406.
Abstract
The physiological and physical components of the feedback loop involving intercellular CO(2) concentration (c(i)) and stomata are identified. The loop gain (G) is a measure of the degree of homeostasis in a negative feedback loop [the expression 1/(1-G) represents the fraction to which feedback reduces a perturbance]. Estimates are given for the effects of G on responses of stomata and c(i) to changes in ambient CO(2) concentration, light intensity, and perturbations in the water relations of a leaf. At normal ambient CO(2) concentration, the gain of the loop involving stomatal conductance and c(i) was found to be -2.2 in field-grown Zea mays, -3.6 if plants of this species were grown in a growth chamber, and zero in well watered Xanthium strumarium in the vegetative state.
摘要
识别了涉及细胞间二氧化碳浓度（c(i)）和气孔的反馈回路的生理和物理组成部分。回路增益（G）是负反馈回路中稳态程度的一种度量[表达式1/(1 - G)表示反馈降低扰动的比例]。给出了G对气孔和c(i)对环境二氧化碳浓度、光照强度变化以及叶片水分关系扰动的响应影响的估计值。在正常环境二氧化碳浓度下，发现田间种植的玉米中涉及气孔导度和c(i)的回路增益为 -2.2，该物种的植株在生长室中生长时为 -3.6，而在营养状态下充分浇水的苍耳中为零。
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本文引用的文献
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