CORRELATIONS BETWEEN CARBON ISOTOPE DISCRIMINATION AND LEAF CONDUCTANCE TO WATER-VAPOR IN COMMON BEANS
CORRELATIONS BETWEEN CARBON ISOTOPE DISCRIMINATION AND LEAF CONDUCTANCE TO WATER-VAPOR IN COMMON BEANS
复制标题
DOI：
10.1104/pp.93.4.1422
复制
发表时间：
1990-08-01
期刊：
影响因子：
7.4
通讯作者：
EHLERINGER, JR
中科院分区：
文献类型：
--
作者：
EHLERINGER, JR
碳同位素鉴别（Δ）对10个菜豆品种进行了田间测定。有实质性的变化（大于2.permill..）在叶中Δ值和营养和生殖发育阶段之间保持这些差异。这些平均线也表现出很大的差异，叶电导水蒸气，并再次保持这些差异在整个发展阶段。铅电导的差异与Δ正相关。值，无论电导测量为总叶电导或作为个人电导的上部或下部叶表面。观察到的叶电导率的差异与气孔密度的差异。菜豆株系间叶片凯氏氮含量差异不大，说明菜豆株系间光合能力相似。因此，由于Δ值和叶片导度呈正相关，这些数据表明，在气孔限制光合气体交换速率的程度上，菜豆品系之间可能存在差异。
Carbon isotope discrimination (.DELTA.) was measured in the field on 10 cultivars of common bean (Phasolus vulgaris L.). There was substantial variation (more than 2 .permill..) in leaf .DELTA. values and these differences were maintained between vegetative and reproductive developmental stages. These mean lines also exhibited substantial differences in leaf conductance to water vapor, and again these differences were maintained across developmental stages. The differences in lead conductance were positively correlated with .DELTA. values, whether conductance was measured as total leaf conductance or as the individual conductances of either upper or lower leaf surfaces. The observed differences in leaf conductances were not associated with difference in stomatal density. There were small differences among bean lines in their leaf Kjeldahl nitrogen contents, which is interpreted as indicating that photosynthetic capacity among bean lines was similar. Thus, because .DELTA. values and leaf conductance were positively correlated, these data suggested that there may have been differences among bean lines in the extent to which stomata limited phostosynthetic gas exchnage rates.