Navigation überspringen
Universitätsbibliothek Heidelberg
Status: Bibliographieeintrag

Verfügbarkeit
Standort: ---
Exemplare: ---
heiBIB
 Online-Ressource
Verfasst von:Gaquerel, Emmanuel [VerfasserIn]   i
 Steppuhn, Anke [VerfasserIn]   i
 Baldwin, Ian T. [VerfasserIn]   i
Titel:Nicotiana attenuata α-DIOXYGENASE1 through its production of 2-hydroxylinolenic acid is required for intact plant defense expression against attack from Manduca sexta larvae
Verf.angabe:Emmanuel Gaquerel, Anke Steppuhn and Ian T. Baldwin
E-Jahr:2012
Jahr:31 August 2012
Umfang:12 S.
Fussnoten:Gesehen am 19.05.2017
Titel Quelle:Enthalten in: The new phytologist
Ort Quelle:Oxford [u.a.] : Wiley-Blackwell, 1902
Jahr Quelle:2012
Band/Heft Quelle:196(2012), 2, Seite 574-585
ISSN Quelle:1469-8137
Abstract:Nicotiana attenuata α-DIOXYGENASE1 (α-DOX1) is an oxylipin-forming gene elicited during herbivory by fatty acid amino acid conjugates (FACs) contained in oral secretions of Manduca sexta.* To understand the roles of Naα-DOX1 and its major product, 2-hydroxylinolenic acid (2-hydroxylinolenic acid), in N. attenuata's anti-herbivore defenses, we used a transgenic line specifically silenced in Naα-DOX1 expression (ir-α-dox1) and monitored 2-HOT production in M. sexta-damaged tissues and its role in influencing the production of direct defense compounds and resistance to this insect.* Attack by M. sexta larvae amplified 2-HOT formation at the feeding sites; a reaction probably facilitated by Naα-DOX1's high pH optimum which allows 2-HOT formation to occur in the more alkaline conditions at the feeding sites or potentially in the insect mouth parts after the leaf tissue is ingested. Manduca sexta larvae performed better on ir-α-dox1 plants than on wild-type (WT) plants as a result of attenuated herbivory-specific JA and 2-HOT bursts as well as JA-inducible well-established defenses (nicotine, caffeoylputrescine and trypsin proteinase inhibitors). Repeated applications of 2-HOT to wounds before insect feeding partly amplified JA-controlled defenses and restored the resistance of ir-α-dox1 plants.* We conclude that 2-HOT, produced by attack-activated α-DOX1 activity, participates in defense activation during insect feeding.
DOI:doi:10.1111/j.1469-8137.2012.04286.x
URL:Bitte beachten Sie: Dies ist ein Bibliographieeintrag. Ein Volltextzugriff für Mitglieder der Universität besteht hier nur, falls für die entsprechende Zeitschrift/den entsprechenden Sammelband ein Abonnement besteht oder es sich um einen OpenAccess-Titel handelt.

kostenfrei: Volltext: http://dx.doi.org/10.1111/j.1469-8137.2012.04286.x
 kostenfrei: Volltext: http://onlinelibrary.wiley.com/doi/10.1111/j.1469-8137.2012.04286.x/abstract
 DOI: https://doi.org/10.1111/j.1469-8137.2012.04286.x
Datenträger:Online-Ressource
Sprache:eng
Sach-SW:alpha-dioxygenase
 herbivory
 jasmonic acid
 oxylipin
 tobacco
K10plus-PPN:1558802037
Verknüpfungen:→ Zeitschrift

Permanenter Link auf diesen Titel (bookmarkfähig):  https://katalog.ub.uni-heidelberg.de/titel/68121123   QR-Code
zum Seitenanfang