与脱落酸有关的 flacca 番茄突变体的气体交换、气孔行为和 δC 值。
Gas Exchange, Stomatal Behavior, and deltaC Values of the flacca Tomato Mutant in Relation to Abscisic Acid.
机构信息
Department of Environmental Biology, Research School of Biological Sciences, The Australian National University, Canberra City, A.C.T. 2605, Australia.
出版信息
Plant Physiol. 1983 May;72(1):245-50. doi: 10.1104/pp.72.1.245.
The relationship between stomatal conductance and capacity for assimilation was investigated in flacca, a mutant of tomato (Lycopersicon esculentum Mill.) that has abnormal stomatal behavior and low abscisic acid (ABA) content. The assimilation capacity, determined by measuring assimilation rate as a function of intercellular CO(2) pressure, did not differ in leaves of flacca and its parent variety, Rheinlands Ruhm (RR). On the other hand, stomatal conductance of flacca leaves was greater than that of RR, and could be phenotypically reverted by spraying with 30 micromolar ABA. Stomatal conductance of flacca leaves was also reduced by increasing CO(2) pressure, increasing leaf to air vapor pressure difference, and decreasing quantum flux, irrespective of ABA treatment.The high conductance of flacca leaves resulted in a high intercellular CO(2) pressure. This allowed greater discrimination against (13)CO(2), as evidenced by more negative delta (13)C values for flacca as compared to RR. The delta (13)C values of both flacca and RR plants as influenced by ABA treatment were consistent with predictions based on gas exchange measurements, using a recent model of discrimination.
我们研究了气孔导度和同化能力之间的关系，flacca 是番茄（Lycopersicon esculentum Mill.）的一个突变体，具有异常的气孔行为和低脱落酸（ABA）含量。同化能力通过测量作为细胞间 CO2 压力函数的同化率来确定，flacca 和其亲本品种 Rheinlands Ruhm（RR）的叶片之间没有差异。另一方面，flacca 叶片的气孔导度大于 RR，并且可以通过喷洒 30 微摩尔 ABA 表型逆转。气孔导度还可以通过增加 CO2 压力、增加叶片与空气蒸气压差和降低量子通量来降低，而不管 ABA 处理如何。flacca 叶片的高导度导致细胞间 CO2 压力升高。这使得（13）CO2 的歧视更为严重，正如 flacca 与 RR 相比 delta（13）C 值更负所证明的那样。ABA 处理对 flacca 和 RR 植物的 delta（13）C 值的影响与基于气体交换测量的最近的歧视模型的预测一致。
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