Nassery H, Ogata G, Nieman R H, Maas E V
United States Salinity Laboratory, Agricultural Research Service, United States Department of Agriculture, Riverside, California 92501.
Plant Physiol. 1978 Aug;62(2):229-31. doi: 10.1104/pp.62.2.229.
The growth and phosphate mobilization of control and salt-stressed sesame (Sesamum indicum L.) and pepper (Capsicum annuum L.) plants were examined to ascertain whether or not translocation limits growth of salt-stressed plants. Plants were grown in a complete nutrient solution with and without excess salt. One-half of the control and salt-stressed plants were later transferred to phosphate-free culture solution ("-P" plants). Measurements of growth and phosphate pools in leaves indicated that with or without salinity "-P" plants utilized their phosphate reserves to support growth for a time at rates equaling those of plants supplied with phosphate. The results indicate that mobilization was not limiting for growth of salt-stressed plants.Defoliation experiments were performed at a developmental stage when the import of assimilates by the youngest expanding leaves could be changed by removing certain source or sink leaves. These experiments also indicated that phloem transport was not limiting for leaf growth on salt-stressed plants.
研究了对照和盐胁迫下芝麻（Sesamum indicum L.）及辣椒（Capsicum annuum L.）植株的生长和磷素动员情况，以确定转运是否限制了盐胁迫植株的生长。植株在添加和不添加过量盐分的完全营养液中生长。之后，将对照和盐胁迫植株的一半转移到无磷培养液中（“-P”植株）。对叶片生长和磷素库的测量表明，无论有无盐分，“-P”植株都会在一段时间内利用其磷素储备以等同于供应磷素植株的速率来支持生长。结果表明，动员作用并非盐胁迫植株生长的限制因素。在发育阶段进行了去叶实验，此时去除某些源叶或库叶可改变最幼嫩展开叶的同化物输入。这些实验还表明，韧皮部运输并非盐胁迫植株叶片生长的限制因素。
