Ecology of SO2 resistance: III. Metabolic changes of C3 and C4Atriplex species due to SO2 fumigations
Ecology of SO2 resistance: III. Metabolic changes of C3 and C4Atriplex species due to SO2 fumigations
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抗SO2生态学：Ⅲ．
DOI：
10.1007/bf00346965
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发表时间：
1980
期刊：
影响因子：
--
通讯作者：
H. Mooney
中科院分区：
文献类型：
--
作者：
W. Winner;H. Mooney
两种生态匹配的草本滨藜的光合过程对SO2熏蒸的反应不同。C3种滨藜比C4种滨藜更敏感。萨布洛萨。这种敏感性差异部分归因于 C3 物种在正常空气和饱和光中的电导率较高，以及暴露于 SO2 后对气孔开放的更大刺激。此外，C3物种的光合机制比C4物种具有更高的内在SO2敏感性。这两个物种的光合反应之间的差异也可能反映了叶肉组织形态结构的差异以及C3物种初始光合羧化酶对SO2的更大敏感性。这些对比鲜明的 C3 和 C4 Atriplex 物种的光合 SO2 敏感性的某些差异很可能是 C3 和 C4 植物的一般特征。
The photosynthetic processes of two ecologically-matched, herbaceousAtriplexspecies differed in their response to SO2fumigations.Atriplex triangularis, a C3species, was more sensitive than the C4species,A. sabulosa. This difference in sensitivity can be attributed in part to the higher conductance of the C3species in normal air and saturating light as well as greater stimulation of stomatal opening following exposure to SO2. In addition, photosynthetic mechanisms of the C3species had higher intrinsic SO2sensitivity than the C4species. Differences between photosynthetic responses of these two species may also reflect differences in morphological configuration of mesophyll tissues and greater SO2sensitivity of the initial photosynthetic carboxlating enzyme of the C3species. It is likely that certain of the differences in photosynthetic SO2sensitivity of these contrasting C3and C4Atriplexspecies are characteristic of C3and C4plants in general.