Adaptations to Drought in Five Woody Species Co-Occurring on Shallow-Soil Ridges
Adaptations to Drought in Five Woody Species Co-Occurring on Shallow-Soil Ridges
复制标题
浅土山脊上共生的五种木本植物对干旱的适应
DOI：
10.1071/pp9920539
复制
发表时间：
1992
期刊：
影响因子：
--
通讯作者：
M. Mishio
中科院分区：
文献类型：
--
作者：
M. Mishio
黎明前叶水势和控制水流通过五个共同发生的植物种，Dodonaea viscosa Jacquin（无患子科），Wikstroemia pseudoretusa Koidzumi（百里香科），女贞的植物参数。1989年4月下旬、6月上旬和9月上旬，对木樨科（Oleaceae）、金缕梅科（Hamamelidaceae）的鳞叶二蕊草（Distyelophilus lepidotum Nakai）和锦葵科（Malvaceae）的木槿（Hibiscus glaber Matsumura）进行了比较。这些物种是在日本小笠原群岛的浅土山脊上发现的灌木群落的常见成员。平均黎明前叶水势在干燥期间的9月初是最低的多德。粘滞生长在微网站与浅土壤上的山脊。深根种为Dis. Lepidotum和H. glaber的黎明前叶水势值高于浅根植物L. micranthum和W.假凹。叶片的解剖形态特征和水分关系等生理特性表明，W。pseudoretusa和H. glaber比L. micranthum和Dis. Lepidotum; pseudoretusa和H. glaber可能会避免严重的压力，暂时叶下降和密集的深根。叶电导和水力传导之间的关系表明，在小笠原群岛的旱生浅土山脊上，五个物种之间的紧密联系，不同的水分利用模式。
Pre-dawn leaf water potential and parameters controlling water flow through a plant of five co-occurring plant species, Dodonaea viscosa Jacquin (Sapindaceae), Wikstroemia pseudoretusa Koidzumi (Thymelaeaceae), Ligustrum micranthum Zucc. (Oleaceae), Distylium lepidotum Nakai (Hamamelidaceae) and Hibiscus glaber Matsumura (Malvaceae) were compared in late April, early June and early September 1989. These species are common members of the scrub community found on shallow-soil ridges in the Bonin Islands, Japan. Mean pre-dawn leaf water potential during the dry period of early September was lowest in Dod. Viscosa growing on microsites with shallower soil on a ridge. Deeper rooted species, Dis. Lepidotum and H. glaber, had higher values of pre-dawn leaf water potential than shallower rooted species, L. micranthum and W. pseudoretusa. Anatomical and morphological characteristics, and physiological characteristics such as water relations of leaves suggested that W. pseudoretusa and H. glaber are less tolerant to drought than L. micranthum and Dis. Lepidotum, and that W. pseudoretusa and H. glaber might avoid severe stress by temporal leaf fall and dense deeper root, respectively. Relationships between leaf conductance and hydraulic conductance suggested different water use patterns among the five species growing in close proximity on xeric shallow-soil ridges in the Bonin Islands.