title: Stomatal responses to humidity of coastal and interior populations of a Californian shrub.
abstract: 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.
authors.affiliation: Department of Biological Sciences, Stanford University, 94305, Stanford, CA, USA.
authors.forename: H A
authors.initials: HA
authors.lastname: Mooney
authors.affiliation: Department of Biological Sciences, Stanford University, 94305, Stanford, CA, USA.
authors.forename: C
authors.initials: C
authors.lastname: Chu