PRESSURE-INDUCED WATER AND SOLUTE FLOW THROUGH PLANT-ROOTS
PRESSURE-INDUCED WATER AND SOLUTE FLOW THROUGH PLANT-ROOTS
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DOI：
10.1093/jxb/35.6.869
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发表时间：
1984-01-01
影响因子：
6.9
通讯作者：
PITMAN, MG
中科院分区：
文献类型：
--
作者：
SALIM, M;PITMAN, MG
利用压力室对去顶向日葵[向日葵]、番茄[番茄]和红小豆[四季豆]根在加压条件下的水盐流动进行了研究。在不同的根基质上施加不同的压力，测量了这些根系的JV[H2O流率]值，并计算了Lp[导水率]。在相同的水流量下，比较了外加压力下与完整植物中的K、Na和Cl的通量。与未受压的完整植物相比，压力下去顶的根的Na和Cl通量高出10到100倍。压力下的根可能不完全类似于完整的植物根，压力诱导流可能不是确定根中离子流与水流特性的可靠方法。
Water and salt flows through detopped sunflower [Helianthus annuus], tomato [Lycopersicon esculentum] and red kidney bean [Phaseolus vulgaris] roots under applied pressure were studied using a pressure chamber. Values of Jv [H2O flow rate] for these root systems were measured applying variable pressure on the root medium, and LP [hydraulic conductance] calculated. The K, Na and Cl fluxes under applied pressure were compared with those in intact plants at the same water flow rates. Ten to 100 times higher Na and Cl fluxes were observed through detopped roots under pressure as compared to those in the unpressurized, intact plants. The roots under pressure may not be completely analogous to intact plant roots, and pressure-induced flow may not be a reliable method of determining characteristics of ion flow in roots in relation to water flow.