Inhibition of ethylene synthesis reduces salt-tolerance in tomato wild relative species Solanum chilense

[en] Exposure to salinity induces a burst in ethylene synthesis in the wild tomato halophyte plant species Solanum chilense. In order to gain information on the role of ethylene in salt adaptation, plants of Solanum chilense (accession LA4107) and of cultivated glycophyte Solanum lycopersicum (cv. Ailsa Craig) were cultivated for 7 days in nutrient solution containing 0 or 125 mM NaCl in the presence or absence of the inhibitor of ethylene synthesis (aminovinylglycine (AVG) 2 μM). Salt-induced ethylene synthesis in S. chilense occurred concomitantly with an increase in stomatal conductance, an efficient osmotic adjustment and the maintenance of carbon isotope discrimination value (Δ13C). In contrast, in S. lycopersicum, salt stress decreased stomatal conductance and Δ13C values while osmotic potential remained higher than in S. chilense. Inhibition of stress-induced ethylene synthesis by AVG decreased stomatal conductance and Δ13C in S. chilense and compromised osmotic adjustment. Solanum chilense behaved as an includer and accumulated high amounts of Na in the shoot but remained able to maintain K nutrition in the presence of NaCl. This species however did not stimulate the expression of genes coding for high-affinity K transport but genes coding for ethylene responsive factor ERF5 and JREF1 were constitutively more expressed in S. chilense than in S. lycopersicum. It is concluded that ethylene plays a key role in salt tolerance of S. chilense. © 2016

Disciplines :

Environmental sciences & ecology
Agriculture & agronomy
Phytobiology (plant sciences, forestry, mycology...)

Author, co-author :

Gharbi, E.; Groupe de Recherche en Physiologie végétale (GRPV), Earth and Life Institute – Agronomy (ELI-A), Université catholique de Louvain, Louvain-la-Neuve, Belgium, Laboratoire d'Ecologie végétale, Faculté des Sciences, Université de Tunis El Manar, Tunisia

Martínez, J.-P.; Instituto de Investigaciones Agropecuarias (INIA – La Cruz), La Cruz, Chile

Benahmed, H.; Laboratoire d'Ecologie végétale, Faculté des Sciences, Université de Tunis El Manar, Tunisia

Lepoint, Gilles ; Université de Liège > Département de Biologie, Ecologie et Evolution > Océanographie biologique

Vanpee, B.; Groupe de Recherche en Physiologie végétale (GRPV), Earth and Life Institute – Agronomy (ELI-A), Université catholique de Louvain, Louvain-la-Neuve, Belgium

Quinet, M.; Groupe de Recherche en Physiologie végétale (GRPV), Earth and Life Institute – Agronomy (ELI-A), Université catholique de Louvain, Louvain-la-Neuve, Belgium

Lutts, S.; Groupe de Recherche en Physiologie végétale (GRPV), Earth and Life Institute – Agronomy (ELI-A), Université catholique de Louvain, Louvain-la-Neuve, Belgium

Language :

English

Title :

Inhibition of ethylene synthesis reduces salt-tolerance in tomato wild relative species Solanum chilense

Publication date :

2017

Journal title :

Journal of Plant Physiology

ISSN :

0176-1617

Publisher :

Elsevier GmbH

Volume :

210

Pages :

24-37

Peer reviewed :

Peer Reviewed verified by ORBi

Name of the research project :

WBI; 15/63179

Funders :

WBI - Wallonie-Bruxelles International [BE]
F.R.S.-FNRS - Fonds de la Recherche Scientifique [BE]

Available on ORBi :

since 30 January 2017

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