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首页> 外文期刊>Spanish Journal of Agricultural Research >Freezing tolerance in Algerian populations of Atriplex halimus and Atriplex canescens
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Freezing tolerance in Algerian populations of Atriplex halimus and Atriplex canescens

机译：阿尔及利亚滨藜和巴西滨藜的耐寒性

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摘要

The freezing tolerance of populations of the fodder species Atriplex halimus L. and Atriplex canescens (Pursh.) Nutt (Chenopodiaceae) from different locations in Algeria was investigated, in relation to plant provenance and leaf cation concentrations. For two populations of A. halimus, the effect of increased soil salinity (addition of NaCl) on tolerance was determined. Tolerance was determined in leaf electrolyte leakage assays and by assessment of visual damage, after exposure to temperatures between -5 and -25 degrees C. There was significant correlation (P<0.005) between freezing tolerance and the leaf sap concentrations of Na and Na+K, tolerance being improved markedly by soil salinisation, but no relationship between tolerance and the soil salinity or minimum winter temperatures of the original sites of the populations. It is concluded that, for these halophytic species, the soil salinity (supply of ionic osmolytes) at cold-winter sites will be of great importance regarding the likely freezing damage.
机译：考察了阿尔及利亚不同地区的草食滨藜和藜麦（藜科）种群的冷冻耐受性，与植物来源和叶片阳离子浓度有关。对于两个土壤曲霉种群，确定了土壤盐分增加（添加氯化钠）对耐受性的影响。在暴露于-5到-25摄氏度之间的温度后，通过叶片电解质渗漏试验和评估视觉损伤来确定耐受性。冷冻耐受性与叶片和汁液中Na和Na +的浓度之间存在显着相关性（P <0.005） K，土壤盐渍化显着改善了耐性，但耐性与土壤盐度或种群原始地点的最低冬季温度之间没有关系。结论是，对于这些盐生植物物种，在寒冷冬季，土壤盐分（离子渗透物的供应）对于可能的冻害非常重要。

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