Mooney H A, Chu C
Department of Biological Sciences, Stanford University, 94305, Stanford, CA, USA.
Oecologia. 1983 Mar;57(1-2):148-150. doi: 10.1007/BF00379572.
Plants of two populations of Diplacus aurantiacus, a subshrub of the Californian chaparral, were compared for their stomatal response to water vapor concentration gradients. Plants of a coastal and an interior population were compared when grown under both low and high humidities. When grown at high humidity the coastal plants exhibited higher conductances and higher transpiration/photosynthesis ratios at all leaf-to-air water vapor concentration gradients than did the interior plants. Although all of the plants examined showed a pronounced stomatal response to humidity the response did not result in the degree of regulation of water-use efficiency reported for other Californian coastal species.
对加利福尼亚丛林中的一种亚灌木——橙黄双管花两个种群的植株，就其气孔对水汽浓度梯度的响应进行了比较。在低湿度和高湿度条件下种植时，对一个沿海种群和一个内陆种群的植株进行了比较。在高湿度条件下种植时，在所有叶-气水汽浓度梯度下，沿海植株比内陆植株表现出更高的导度和更高的蒸腾/光合比率。尽管所有检测的植株对湿度都表现出明显的气孔响应，但这种响应并未导致达到其他加利福尼亚沿海物种所报道的水分利用效率调节程度。
