The role of arbuscular mycorrhizal symbiosis in improving plant water status under drought

0575795 - MBÚ 2024 RIV US eng J - Journal Article
Abdalla, M. - Bitterlich, M. - Jansa, Jan - Püschel, David - Ahmed, M. A.
The role of arbuscular mycorrhizal symbiosis in improving plant water status under drought.
Journal of Experimental Botany. Roč. 74, č. 16 (2023), s. 4808-4824. ISSN 0022-0957. E-ISSN 1460-2431
R&D Projects: GA ČR GA20-08475S
Institutional support: RVO:61388971 ; RVO:67985939
Keywords : Arbuscular mycorrhizal fungi (AMF) * leaf water potential * root hydraulics * root water uptake * soil drying * soil hydraulics * stomatal conductance * transpiration rate
OECD category: Microbiology
Impact factor: 6.9, year: 2022
Method of publishing: Limited access
https://academic.oup.com/jxb/article/74/16/4808/7220146?login=true

Arbuscular mycorrhizal fungi (AMF) have been presumed to ameliorate crop tolerance to drought. Here, we review the role of AMF in maintaining water supply to plants from drying soils and the underlying biophysical mechanisms. We used a soil-plant hydraulic model to illustrate the impact of several AMF mechanisms on plant responses to edaphic drought. The AMF enhance the soil's capability to transport water and extend the effective root length, thereby attenuating the drop in matric potential at the root surface during soil drying. The synthesized evidence and the corresponding simulations demonstrate that symbiosis with AMF postpones the stress onset limit, which is defined as the disproportionality between transpiration rates and leaf water potentials, during soil drying. The symbiosis can thus help crops survive extended intervals of limited water availability. We also provide our perspective on future research needs and call for reconciling the dynamic changes in soil and root hydraulics in order to better understand the role of AMF in plant water relations in the face of climate changes.
Permanent Link: https://hdl.handle.net/11104/0345515