Arbuscular mycorrhizal symbiosis alleviates drought stress imposed on Knautia arvensis plants in serpentine soil

0395792 - BÚ 2014 RIV NL eng J - Journal Article
Doubková, Pavla - Vlasáková, E. - Sudová, Radka
Arbuscular mycorrhizal symbiosis alleviates drought stress imposed on Knautia arvensis plants in serpentine soil.
Plant and Soil. Roč. 370, 1-2 (2013), s. 149-161. ISSN 0032-079X. E-ISSN 1573-5036
R&D Projects: GA AV ČR KJB600050812
Institutional support: RVO:67985939
Keywords : arbuscular mycorrhizal fungi * drought * serpentine soil
Subject RIV: EF - Botanics
Impact factor: 3.235, year: 2013

The inoculation with arbuscular mycorrhizal fungi (AMF) improved growth and increased phosphorus uptake of Knautia arvensis plants subjected to different drought intensity in their native serpentine soil. The diminishing water supply caused a gradual decrease in plant growth, accompanied by increasing concentrations of drought stress markers (proline, abscisic acid) in root tissues. Mycorrhizal growth dependence and phosphorus uptake benefit increased with drought intensity, and the alleviating effect of AMF on plant drought stress was also indicated by lower proline accumulation. However, the potential of AMF to alleviate drought stress was limited beyond a certain threshold, as indicated by a steep decline in mycorrhizal growth dependence and phosphorus uptake benefit and a concomitant rise in proline concentrations in the roots of mycorrhizal plants at the highest drought intensity.
Permanent Link: http://hdl.handle.net/11104/0223715