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Publication Details
AFRICAN RESEARCH NEXUS
SHINING A SPOTLIGHT ON AFRICAN RESEARCH
agricultural and biological sciences
The jasmonate pathway mediates salt tolerance in grapevines
Journal of Experimental Botany, Volume 63, No. 5, Year 2012
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Description
Salt stress is a major constraint for many crop plants, such as the moderately salt-sensitive economically important fruit crop grapevine. Plants have evolved different strategies for protection against salinity and drought. Jasmonate signalling is a central element of both biotic and abiotic stress responses. To discriminate stress quality, there must be cross-talk with parallel signal chains. Using two grapevine cell lines differing in salt tolerance, the response of jasmonate ZIM/tify-domain (JAZ/TIFY) proteins (negative regulators of jasmonate signalling), a marker for salt adaptation Na+/H+ EXCHANGER (NHX1), and markers for biotic defence STILBENE SYNTHASE (StSy) and RESVERATROL SYNTHASE (RS) were analysed. It is shown that salt stress signalling shares several events with biotic defence including activity of a gadolinium-sensitive calcium influx channel (monitored by apoplastic alkalinization) and transient induction of JAZ/TIFY transcripts. Exogenous jasmonate can rescue growth in the salt-sensitive cell line. Suppression of jasmonate signalling by phenidone or aspirin blocks the induction of JAZ/TIFY transcripts. The rapid induction of RS and StSy characteristic for biotic defence in grapevine is strongly delayed in response to salt stress. In the salt-tolerant line, NHX1 is induced and the formation of reactive oxygen species, monitored as stress markers in the sensitive cell line, is suppressed. The data are discussed in terms of a model where salt stress signalling acts as a default pathway whose readout is modulated by a parallel signal chain triggered by biotic factors downstream of jasmonate signalling. © 2011 The Author(s).
Available Materials
https://efashare.b-cdn.net/share/pmc/articles/PMC3295401/bin/supp_63_5_2127__index.html
https://efashare.b-cdn.net/share/pmc/articles/PMC3295401/bin/supp_err426_00070953-file001.pdf
Authors & Co-Authors
Ismail, Ahmed
Germany, Karlsruhe
Karlsruher Institut Für Technologie
Egypt, Damanhour
Faculty of Agriculture
Riemann, Michael
Germany, Karlsruhe
Karlsruher Institut Für Technologie
Nick, Peter
Germany, Karlsruhe
Karlsruher Institut Für Technologie
Statistics
Citations: 144
Authors: 3
Affiliations: 2
Identifiers
Doi:
10.1093/jxb/err426
ISSN:
00220957
e-ISSN:
14602431