Symbiotic interaction enhances the recovery of endangered tree species in the fragmented Maulino Forest
Version 2 2021-03-22, 18:12
Version 1 2021-03-12, 19:23
Posted on 2021-03-22 - 18:12 authored by Gabriel Ballesteros
Beneficial plant-associated microorganisms, such as fungal endophytes,
are key partners that normally improve plant survival under different
environmental stresses. It has been shown that microorganisms from
extreme environments, like those associated with the roots of Antarctica
plants, can be good partners to increase the performance of crop plants
and to restore endangered native plants. Nothofagus alessandrii and N.
glauca, are among the most endangered species of Chile, restricted to a
narrow and/or limited distributional range associated mainly to the
Maulino forest in Chile. Here we evaluated the effect of the inoculation
with a fungal consortium of root endophytes isolated from the Antarctic
host plant Colobanthus quitensis on the ecophysiological performance
(photosynthesis, water use efficiency and growth) of both endangered
tree species. We also, tested how Antarctic root-fungal endophytes could
affect the potential distribution of N. alessandrii through niche
modeling. Additionally, we conducted a transplant experiment recording
plant survival on two years in order to validate the model. Lastly, to
evaluate if inoculation with Antarctic endophytes has negative impacts
on native soil microorganisms, we compared the biodiversity of fungi and
bacterial in the rhizospheric soil of transplanted individuals of N.
alessandrii inoculated and non-inoculated with fungal endophytes. We
found that inoculation with root-endophytes produced significant
increases in N. alessandrii and N. glauca photosynthetic rates, water
use efficiencies and cumulative growth. In N. alessandrii, seedling
survival was significantly greater on inoculated plants compared with
non-inoculated individuals. For this species, a spatial distribution
modeling revealed that, inoculation with root-fungal endophytes could
potentially increase the current distributional range by almost
three-fold. Inoculation with root-fungal endophytes, did not affect
native rhizospheric microbiome profiles, nor in terms of species
abundance or diversity. Our results suggest that the studied consortium
of Antarctic root-fungal endophytes improve the ecophysiological
performance as well as the survival of inoculated trees and can be used
as a biotechnological tool for the restoration of endangered tree
species
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Molina-Montenegro, Marco A.; Torres-Díaz, Cristian; A. Valladares, Moisés; Acuña-Rodriguez, Ian S.; Ballesteros, Gabriel; Barrera, Andrea; et al. (2021). Symbiotic interaction enhances the recovery of endangered tree species in the fragmented Maulino Forest. figshare. Collection. https://doi.org/10.6084/m9.figshare.c.5337266.v2
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AUTHORS (7)
MM
Marco A. Molina-Montenegro
CT
Cristian Torres-Díaz
MA
Moisés A. Valladares
IA
Ian S. Acuña-Rodriguez
AB
Andrea Barrera
CA
Cristian Atala