Microbial Technology Division, CSIR - Central Institute of Medicinal and Aromatic Plants, Lucknow, 226015, India.
J Sci Food Agric. 2013 Jul;93(9):2154-61. doi: 10.1002/jsfa.6021. Epub 2013 Jan 3.
Mentha arvensis is cultivated in large parts of the world for its menthol-rich essential oil. The study investigates the potential of four mycorrhizal fungi, viz. Glomus mosseae (Gm), Glomus aggregatum (Ga), Glomus fasciculatum (Gf) and Glomus intraradices (Gi) in alleviating NaCl-induced salt stress in Mentha arvensis cv. Kosi and establishes the specificity of interaction between different mycorrhizal species and their effectiveness in mitigating salt stress in Mentha arvensis. Mycorrhizal and non-mycorrhizal Mentha plants were subjected to NaCl-induced salinity.
Among the four Glomus species, Gm and Gi reduced salt-induced herb yield losses: a loss of 27.53% and 25.58% respectively under salt stress in comparison to 51.00% in non-mycorrhizal M. arvensis salt-stressed plants. Gm- and Gi-inoculated plants also recorded higher leaf:stem ratio, oil content, and oil yield and menthol concentration in essential oil under both saline and non-saline conditions.
Better performance in terms of herb yield, and oil content and yield was observed in Gi- and Gm-inoculated M. arvensis plants, suggesting the capability of Gi and Gm in protecting plants from the detrimental effects of salt stress; beneficial effects of arbuscular mycorrhizal fungi, however, may vary with host and environment.
由于含有丰富的薄荷醇，许多地方都大量种植薄荷来提取精油。本研究旨在探讨四种丛枝菌根真菌（摩西球囊霉（Gm）、聚丛球囊霉（Ga）、地表球囊霉（Gf）和内养根串珠霉（Gi））对缓解盐胁迫的潜力，以及不同菌根真菌之间相互作用的特异性及其在缓解盐胁迫下对薄荷生长的有效性。采用盐胁迫的方式处理接种和未接种菌根的薄荷植株。
在四种丛枝菌根真菌中，摩西球囊霉（Gm）和内养根串珠霉（Gi）减少了盐胁迫下薄荷的生物量损失：与未接种菌根的盐胁迫薄荷植株的 51.00%相比，分别降低了 27.53%和 25.58%。在盐胁迫和非盐胁迫条件下，接种 Gm 和 Gi 的薄荷植株的叶茎比、油含量、油产量和精油中的薄荷醇浓度也更高。
接种 Gi 和 Gm 的薄荷植株在生物量、油含量和产量方面表现出更好的性能，这表明 Gi 和 Gm 能够保护植物免受盐胁迫的不利影响；然而，丛枝菌根真菌的有益效果可能因宿主和环境而异。
