Effect of Soil Salinity on Germination and Survival of Some Steppe Plants in Washington
Effect of Soil Salinity on Germination and Survival of Some Steppe Plants in Washington
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土壤盐分对华盛顿州一些草原植物发芽和存活的影响
DOI：
10.2307/1934113
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发表时间：
1968
期刊：
影响因子：
4.8
通讯作者：
G. Choudhuri
中科院分区：
文献类型：
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作者：
G. Choudhuri
在发芽时的耐盐性和建立的植物忍受逐渐盐渍化的土壤的能力进行了研究，在冰草，Artemesia tridentata，Ephalus cinereus（从盐和非盐生境），独行菜perfoliatum（从盐和非盐生境），和香蒲。发芽率随盐度的增加而降低。所有物种的耐盐性较低，在发芽比他们在苗期，如果盐碱化的培养基是渐进的。盐度的突然上升导致了所有物种的死亡。在所有测试的物种中，串叶独行菜表现出最大的个体发育调节潜力。在一般情况下，建立的植物的反应，以及在现场的物种行为相对应。不利的环境因素，如Na2CO3的优势，可能会导致限制分布的宽叶香蒲，也阻止了冰草从盐碱地定居。结果表明，盐生环境下的串叶独行菜种子比非盐生环境下的串叶独行菜种子耐盐性更强，表明串叶独行菜种子具有生态专化性。在这方面，从盐水和非盐水栖息地的灰岩石斑鱼的人口没有不同。
Salt tolerance at germination and the capacity of the established plants to endure gradual salinization of the soil were studied in Agropyron spicatum, Artemesia tridentata, Elymus cinereus (from saline and non—saline habitats), Lepidium perfoliatum (from saline and non—saline habitats), and Typha latifolia. Percentage germination decreased with increasing salinity. All species were less tolerant of salinity at germination than they were at the seedling stage, if salinization of the culture medium was gradual. An abrupt rise in salinity resulted in death of all species. Of all the species tested Lepidium perfoliatum demonstrated the greatest potential for ontogenetic osmoregulation. In general, the response of the established plants corresponds well with the species behavior in the field. Adverse environmental factors, such as a predominance of Na2CO3, probably results in restricted distribution of Typha latifolia and also keeps Agropyron spicatum from colonizing saline areas. Seeds of Lepidium perfoliatum from saline habitats were more tolerant of salinity than those from non—saline habitats, indicating an ecotypic specialization in this species. Populations of Elymus cinereus from saline and non—saline habitats did not differ in this respect.