Arbuscular mycorrhizal colonization does not improve root hydraulic supply in tomato and pea.

ABSTRACT: Arbuscular mycorrhizal (AM) fungi are known to enhance plant drought tolerance, but the physiological mechanism behind this benefit remains unclear. One explanation is that AM colonization improves root hydraulic conductance (Kr), thereby facilitating more efficient water uptake under soil drying, though this mechanism remains highly debated. Here, we measured Kr in tomato (Solanum lycopersicum L.) and pea (Pisum sativum L.) with and without AM using a noninvasive rehydration technique under soil drying, and this was complemented with the evaporative flux method under hydrated conditions. AM colonization was manipulated either through soil sterilization or by using nonmycorrhizal mutants, ensuring precise control of AM status. In both species, AM colonization had no positive impact on Kr u

SUBMITTER: Sun J 

PROVIDER: S-EPMC12854237 | biostudies-literature | 2026 Jan

REPOSITORIES: biostudies-literature