Involvement of the def-1 Mutation in the Response of Tomato Plants to Arbuscular Mycorrhizal Symbiosis Under Well-Watered and Drought Conditions
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Other documents of the author: Sánchez-Romera, Beatriz; Calvo-Polanco, Mónica; Ruiz-Lozano, Juan Manuel; Zamarreño, Ángel María; Arbona, Vicent; García-Mina, José María; Gomez-Cadenas, Aurelio; Aroca, Ricardo
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comunitat-uji-handle2:10234/2508
comunitat-uji-handle3:10234/6999
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https://doi.org/10.1093/pcp/pcx178 |
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Title
Involvement of the def-1 Mutation in the Response of Tomato Plants to Arbuscular Mycorrhizal Symbiosis Under Well-Watered and Drought ConditionsAuthor (s)
Date
2018Publisher
Oxford University PressISSN
0032-0781; 1471-9053Bibliographic citation
Beatriz Sánchez-Romera, Mónica Calvo-Polanco, Juan Manuel Ruiz-Lozano, Ángel María Zamarreño, Vicent Arbona, Jose María García-Mina, Aurelio Gómez-Cadenas, Ricardo Aroca; Involvement of the def-1 Mutation in the Response of Tomato Plants to Arbuscular Mycorrhizal Symbiosis Under Well-Watered and Drought Conditions, Plant and Cell Physiology, Volume 59, Issue 2, 1 February 2018, Pages 248–261, https://doi.org/10.1093/pcp/pcx178Type
info:eu-repo/semantics/articlePublisher version
https://academic.oup.com/pcp/article/59/2/248/4642916?searchresult=1Version
info:eu-repo/semantics/publishedVersionSubject
Abstract
Jasmonic acid (JA) and arbuscular mycorrhizal (AM) symbioses
are known to protect plants against abiotic and biotic
stresses, but are also involved in the regulation of root hydraulic
conductance (L). The objective ... [+]
Jasmonic acid (JA) and arbuscular mycorrhizal (AM) symbioses
are known to protect plants against abiotic and biotic
stresses, but are also involved in the regulation of root hydraulic
conductance (L). The objective of this experiment
was to elucidate the role of JA in the water relations and
hormonal regulation of AM plants under drought by using
tomato plants defective in the synthesis of JA (def-1). Our
results showed that JA is involved in the uptake and transport
of water through its effect on both physiological parameters
(stomatal conductance and L) and molecular
parameters, mainly by controlling the expression and abundance
of aquaporins. We observed that def-1 plants
increased the expression of seven plant aquaporin genes
under well-watered conditions in the absence of AM
fungus, which partly explain the increment of L by this mutation
under well-watered conditions. In addition, the effects
of the AM symbiosis on plants were modified by the
def-1 mutation, with the expression of some aquaporins and
plant hormone concentration being disturbed. On the other
hand, methyl salicylate (MeSA) content was increased in
non-mycorrhizal def-1 plants, suggesting that MeSA and JA
can act together in the regulation of L. In a complementary
experiment, it was found that exogenous MeSA increased L,
confirming our hypothesis. Likewise, we confirmed that JA,
ABA and SA are hormones involved in plant mechanisms to
cope with stressful situations, their concentrations being
controlled by the AM symbiosis. In conclusion, under wellwatered
conditions, the def-1 mutation mimics the effects of
AM symbiosis, but under drought conditions the def-1 mutation
changed the effects of the AM symbiosis on plants. [-]
Is part of
Plant Cell Physiol. 59(2) (2018)Investigation project
AGL2011-25403Rights
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info:eu-repo/semantics/restrictedAccess
info:eu-repo/semantics/restrictedAccess
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