脱落酸异构体对大豆根系的穿透。
Penetration of soybean root systems by abscisic Acid isomers.
机构信息
Department of Horticultural Science and Landscape Architecture, University of Minnesota, St. Paul, Minnesota 55108.
出版信息
Plant Physiol. 1982 Jun;69(6):1350-2. doi: 10.1104/pp.69.6.1350.
Abstract
The penetration of soybean (Glycine max L. cv. Ransom) root systems by exogenously applied isomers of abscisic acid was monitored by measuring the concentration of the chemical in the xylem exudate of root systems exposed to a three bar hydrostatic pressure difference. The cis-trans isomer penetrated more readily than the trans-trans isomer; however, up to 6 hours was needed to reach steady-state values. Exogenous abscisic acid also decreased volume flux through the root system and increased total carbon dioxide efflux from the vessel containing the root system.
摘要
通过测量暴露于 3 巴静水压力差下的根系木质部渗出液中化学物质的浓度，监测外源脱落酸异构体对大豆（Glycine max L. cv. Ransom）根系的穿透情况。顺式-反式异构体比反式-反式异构体更容易穿透；然而，需要 6 个小时才能达到稳定状态。外源脱落酸还降低了根系的体积通量，并增加了含有根系的容器中总二氧化碳的逸出量。
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