海岸植物滨麦(Leymus mollis)和肾叶打碗花(Calystegia soldanella)根叶碳水化合物含量与土壤Na+含量的关系

doi:10.7522/j.issn.1000-694X.2015.00151

摘要/Abstract

摘要： 研究了烟台海岸优势植物滨麦（Leymus mollis）和肾叶打碗花（Calystegia soldanella）根、叶碳水化合物含量与土壤Na⁺含量的关系，以揭示碳水化合物代谢在植物盐适应中的作用。结果表明：近高潮线处土壤Na⁺含量最高，滨麦根、叶中Na⁺、水分、可溶性糖和淀粉含量也较高。远离高潮线，土壤Na⁺、水分含量下降，滨麦根、叶中Na⁺、可溶性糖、淀粉含量下降，纤维素含量增加；根叶总碳水化合物中可溶性糖、淀粉含量比例降低，纤维素含量比例增高。远离高潮线，肾叶打碗花叶片中Na⁺、可溶性糖含量稳定，淀粉含量上升，纤维素含量降低；根中Na⁺含量上升、可溶性糖含量稳定、淀粉含量和纤维素含量降低；根叶总碳水化合物中淀粉比例增加，纤维素比例减少。在土壤Na⁺浓度较高时，滨麦通过被动积累Na⁺和积累非结构碳水化合物维护根、叶水分平衡，在土壤Na⁺浓度降低及根叶Na⁺含量减少时，将更多的非结构碳水化合物用于生长，部分转化为纤维素用于组织建成。积累Na⁺提高吸水力和保水力、调整总碳水化合物中非结构和结构碳水化合物比例，可能是两盐生植物对异质Na⁺环境适应的重要特征。

关键词: 盐浓度, 总碳水化合物, 非结构性碳水化合物, 结构性碳水化合物

Abstract: In order to learn what role of carbohydrates content play in the plant adapting to salt soil, the structural and non-structural carbohydrates content in the leaves and roots of Leymus mollis and Calystegia soldanella grown in different distances from the high tide line and Na⁺ content in the soil and plants were tested. The results showed that in closed to high tide line with higher Na⁺ content in the soil, there were higher Na⁺ and water contents, soluble sugar and starch contents in the leaves and roots of L. mollis. With increasing distance far from the high tide line and decreasing of Na⁺ content in the soil, there were decreasec in Na⁺ content, soluble sugar and starch, increase in cellulose content and ratio of cellulose to total carbohydrate in the leaves and roots of L mollis. While, with far away high tide line, there were stable content of Na⁺, soluble sugar, increase in the starch content, decrease in the cellulose content in the leaves of C. soldanella. At same times, there were increase in the Na⁺, stable soluble sugar, decrease in starch and cellulose contents in the roots of C. soldanella. It indicated that L. mollis negetively accumulated Na⁺ and increase non-structural carbohydrates to maintain water balance of leaves and roots when there was higher Na⁺ content in the soil, used more non-structural carbohydrates to its growth and conversion to cellulose to built plant tissue when reducing of Na⁺ content. L. mollis and C. soldanella grown in different distances from the high tide line would increase its ability of holding water and taking up water by accumulating Na⁺ in the roots and leaves, and regulate the ratio of non-strutural and structural carbohydrates to total carbohydrates, which would be an important characteristics for them to adapt to different Na⁺ soil environment.

Key words: salt concentration, total carbohydrates, non-structural carbohydrates, structural carbohydrate

中图分类号:

Q945.79

强生斌, 周瑞莲, 梁慧敏. 海岸植物滨麦(Leymus mollis)和肾叶打碗花(Calystegia soldanella)根叶碳水化合物含量与土壤Na⁺含量的关系[J]. 中国沙漠, 2016, 36(6): 1613-1621.

Qiang Shengbing, Zhou Ruilian, Liang Huimin. Relationship of Carbohydrate Contents in Leaves and Roots of Two Coastal Plants, Leymus mollis and Calystegia soldanella, to Na⁺ content in Soil[J]. JOURNAL OF DESERT RESEARCH, 2016, 36(6): 1613-1621.

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