Journal
MOLECULAR PLANT-MICROBE INTERACTIONS
Volume 27, Issue 6, Pages 503-514Publisher
AMER PHYTOPATHOLOGICAL SOC
DOI: 10.1094/MPMI-09-13-0265-R
Keywords
-
Funding
- Consejo Nacional de Ciencia y Tecnologia (CONACYT, Mexico) [177775]
- Consejo de la Investigacion Cientifica (UMSNH, Mexico) [CIC 2.26]
- Marcos Moshinsky Foundation
- CONACYT
Ask authors/readers for more resources
Salt stress is an important constraint to world agriculture. Here, we report on the potential of Trichoderma virens and T atroviride to induce tolerance to salt in Arabidopsis seedlings. We first characterized the effect of several salt concentrations on shoot biomass production and root architecture of Arabidopsis seedlings. We found that salt repressed plant growth and root development in a dose-dependent manner by blocking auxin signaling. Analysis of the wild type and eir1, aux1-7, arf7arf19, and tir1abf2abf19 auxin-related mutants revealed a key role for indole-3-acetic acid (IAA) signaling in mediating salt tolerance. We also found that T virens (Tv29.8) and T atroviride (IMI 206040) promoted plant growth in both normal and saline conditions, which was related to the induction of lateral roots and root hairs through auxin signaling. Arabidopsis seedlings grown under saline conditions inoculated with Trichoderma spp. showed increased levels of abscissic acid, L-proline, and ascorbic acid, and enhanced elimination of Na+ through root exudates. Our data show the critical role of auxin signaling and root architecture to salt tolerance in Arabidopsis and suggest that these fungi may enhance the plant IAA level as well as the antioxidant and osmoprotective status of plants under salt stress.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available