Effects of arbuscular-mycorrhizal glomus species on drought tolerance: physiological and nutritional plant responses.

Applied and Environmental Microbiology
Juan Manuel Ruíz-LozanoM Gomez

Abstract

The tolerance of lettuce plants (Lactuca sativa L. cv. Romana) to drought stress differed with the arbuscular-mycorrhizal fungal isolate with which the plants were associated. Seven fungal species belonging to the genus Glomus were studied for their ability to enhance the drought tolerance of lettuce plants. These fungi had different traits that affected the drought resistance of host plants. The ranking of arbuscular-mycorrhizal fungal effects on drought tolerance, based on the relative decreases in shoot dry weight, was as follows: Glomus deserticola > Glomus fasciculatum > Glomus mosseae > Glomus etunicatum > Glomus intraradices > Glomus caledonium > Glomus occultum. In this comparative study specific mycorrhizal fungi had consistent effects on plant growth, mineral uptake, the CO(inf2) exchange rate, water use efficiency, transpiration, stomatal conductance, photosynthetic phosphorus use efficiency, and proline accumulation under either well-watered or drought-stressed conditions. The ability of the isolates to maintain plant growth effectively under water stress conditions was related to higher transpiration rates, levels of leaf conductance, and proline, N, and P contents. Differences in proline accumulation in leaves amo...Continue Reading

References

Oct 1, 1991·Plant Physiology·R M Augé, X Duan

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Citations

Jan 21, 2015·Canadian Journal of Microbiology·Charles J MasonKenneth F Raffa
Apr 21, 2010·Mycorrhiza·Alejandra Navarro GarcíaMaría Jesús Sánchez-Blanco
Sep 28, 2010·Journal of the Science of Food and Agriculture·María Del Mar AlguacilJosé Ignacio Querejeta
Nov 23, 2013·Ecological Applications : a Publication of the Ecological Society of America·Nicholas A BarberLynn S Adler
Nov 22, 2018·Frontiers in Microbiology·Se Chul ChunMurugesan Chandrasekaran
Jun 11, 2019·PeerJ·Lukas BeuleHui-Ling Liao
Jul 11, 2018·Ecological Applications : a Publication of the Ecological Society of America·Rachel L RubinBruce A Hungate
Feb 11, 2019·Journal of Evolutionary Biology·Connor R FitzpatrickJoani Viliunas

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