Morphological, physiological, and structural responses of two species of artemisia to NaCl stress.
Morphological, physiological, and structural responses of two species of artemisia to NaCl stress.
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两种蒿属植物对 NaCl 胁迫的形态、生理和结构响应
DOI：
10.1155/2013/309808
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发表时间：
2013
影响因子：
--
通讯作者：
Chen FD
中科院分区：
文献类型：
--
作者：
Guan ZY;Su YJ;Teng NJ;Chen SM;Sun HN;Li CL;Chen FD
盐胁迫对滨蒿和滨蒿的影响。vulgaris“Variegate”进行了检查。A. NaCl处理使滨蒿叶片枯萎，而盐胁迫下滨蒿叶片枯萎。vulgaris“Variegate”叶片没有受到显著影响。叶绿素含量在两种植物中均呈下降趋势，其中以A. scoparia。盐胁迫下，两种植物的脯氨酸、丙二醛、可溶性糖和Na+含量均增加，但A.“杂色”脯氨酸和可溶性糖含量较高，MDA和Na+含量较低。结果表明，A. NaCl胁迫下的“杂色”小麦的耐盐性较高。此外，A.对K+/Na+从根到茎、茎到中熟叶和上部新叶的运输选择性，“杂色”高于“金合欢”; NaCl胁迫下的滨蒿A.在NaCl胁迫下，“Variegate”叶绿体保持了形态的完整性，而A. Scoparia叶绿体失去完整性。结果表明，A. Scoparia比A.“杂色”耐盐性主要与植物通过积累可溶性碳水化合物和脯氨酸调节渗透压的能力有关，K+在根和叶之间的梯度分布也有助于植物渗透压的调节和耐盐性的提高。
Effects of salt stress on Artemisia scoparia and A. vulgaris “Variegate” were examined. A. scoparia leaves became withered under NaCl treatment, whereas A. vulgaris “Variegate” leaves were not remarkably affected. Chlorophyll content decreased in both species, with a higher reduction in A. scoparia. Contents of proline, MDA, soluble carbohydrate, and Na+ increased in both species under salt stress, but A. vulgaris “Variegate” had higher level of proline and soluble carbohydrate and lower level of MDA and Na+. The ratios of K+/Na+, Ca2+/Na+, and Mg2+/Na+ in A. vulgaris “Variegate” under NaCl stress were higher. Moreover, A. vulgaris “Variegate” had higher transport selectivity of K+/Na+ from root to stem, stem to middle mature leaves, and upper newly developed leaves than A. scoparia under NaCl stress. A. vulgaris “Variegate” chloroplast maintained its morphological integrity under NaCl stress, whereas A. scoparia chloroplast lost integrity. The results indicated that A. scoparia is more sensitive to salt stress than A. vulgaris “Variegate.” Salt tolerance is mainly related to the ability of regulating osmotic pressure through the accumulation of soluble carbohydrates and proline, and the gradient distribution of K+ between roots and leaves was also contributed to osmotic pressure adjustment and improvement of plant salt tolerance.