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- Title
Effects of salt stress on physiological characters and salt-tolerance of Ulmus pumila in different habitats.
- Authors
Liu Bing-xiang; Wang Zhi-gang; Liang Hai-yong; Yang Min-sheng
- Abstract
Taking the Ulmus pumila seedlings from three different habitats (medium-, mild-, and non-saline soils) as test materials, an experiment was conducted to study their salt-tolerance thresholds and physiological characteristic under different levels (0, 2, 4, 6, 8, and 10 g∙kg-1) of salt stress. With increasing level of the salt stress, the seedlings taken from medium-and mild-saline habitats had a lower increment of leaf membrane permeability, Na+ content, and Na+ / K+ but a higher increment of leaf proline, soluble sugar, and K+ contents, and a lower decrement of leaf starch content, net photosynthetic rate, transpiration rate, intercellular CO2 concentration, and stomatic conductance, as compared with the seedlings taken from non-saline habitat. The salt-tolerance thresholds of the seedlings taken from different habitats were in the order of medium-saline habitat (7. 76 g∙kg-1 ) > mild-saline habitat (7. 37 g∙kg-1 ) > non-saline habitat (6. 95 g∙kg-1). It was suggested that the U. pumila seedlings in medium-and mild-saline habitats had a stronger adaptability to saline soil environment than the U. pumila seedlings in non-saline soil environment.
- Subjects
HALOPHYTES; SIBERIAN elm; HABITATS; SOIL salinity; MEMBRANE permeability (Biology); SEEDLINGS
- Publication
Yingyong Shengtai Xuebao, 2012, Vol 23, Issue 6, p1481
- ISSN
1001-9332
- Publication type
Article