Alleviation of salt-induced adverse impact via mycorrhizal fungi in Ephedra aphylla Forssk
Alleviation of salt-induced adverse impact via mycorrhizal fungi in Ephedra aphylla Forssk
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DOI：
10.1080/17429145.2014.949886
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发表时间：
2014-01-01
影响因子：
3.2
通讯作者：
Hashem, Abeer
中科院分区：
文献类型：
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作者：
Alqarawi, A. A.;Abd Allah, E. F.;Hashem, Abeer
本研究旨在探讨丛枝菌根真菌（AMF）在缓解麻黄盐胁迫中的作用。施用AMF和不施用AMF分别处理75和150 mM氯化钠（NaCl）胁迫。盐胁迫导致叶绿素和类胡萝卜素含量显著降低；施用AMF后，盐害植物的色素含量有所恢复。脯氨酸、酚类和脂质过氧化随NaCl浓度的增加而增加，但经AMF处理的植株积累量较低。NaCl胁迫还提高了植株各抗氧化酶（过氧化氢酶、抗坏血酸过氧化物酶、过氧化物酶、谷胱甘肽还原酶和超氧化物歧化酶）的活性，并在AMF处理下进一步提高。随着NaCl浓度的增加，营养吸收、Na+和Na/K比值增加，钾、磷含量降低。然而，AMF的定植显著增加了K+和P，降低了Na+的摄取。综上所述，AMF处理通过改变葡萄球菌的生理参数、抗氧化剂和养分吸收来降低盐胁迫的严重程度。
The current investigation was carried out to examine the role of arbuscular mycorrhizal fungi (AMF) in alleviating adverse effects of salt stress in Ephedra aphylla. The plants were exposed to 75 and 150 mM sodium chloride (NaCl) stress with and without application of AMF. Salt stress caused significant decrease in chlorophyll and carotenoid contents; however, the application of AMF restored the pigments content in salt-affected plants. Proline, phenols, and lipid peroxidation were increased with increasing concentration of NaCl, but lower accumulation has been reported in plants treated with AMF. NaCl stress also showed increase in different antioxidant enzymes activities (catalase, ascorbate peroxidase, peroxidase, glutathione reductase, and superoxide dismutase), and further increase was observed in plants treated with AMF. The nutrient uptake, Na+ and Na/K ratio increased and potassium and phosphorus were decreased with increasing concentration of NaCl in the present study. However, the colonization with AMF significantly increased K+ and P and reduced Na+ uptake. It is concluded that presown soil treatment with AMF reduced severity of salt stress in E. aphylla through alterations in physiological parameters, antioxidants and uptake of nutrients.