Roles of glucosinolate-myrosinase system in stomatal closure in Arabidopsis
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Arabidopsis myrosinases link the glucosinolate-myrosinase system and the cuticle
Both physical barriers and reactive phytochemicals represent two important components of a plant's defence system against environmental stress. However, these two defence systems have generally been studied independently. Here, we have taken an exclusive opportunity to investigate the connection between a chemical-based plant defence system, represented by the glucosinolate-myrosinase system, a...
متن کاملGlucosinolate breakdown in Arabidopsis: mechanism, regulation and biological significance.
Glucosinolates are a group of thioglucosides in plants of the Brassicales order. Together with their hydrolytic enzymes, the myrosinases, they constitute the 'mustard oil bomb' involved in plant defense. Here we summarize recent studies in Arabidopsis that have provided molecular evidence that the glucosinolate-myrosinase system is much more than a 'two-component defense system,' and started to...
متن کاملNSP-Dependent Simple Nitrile Formation Dominates upon Breakdown of Major Aliphatic Glucosinolates in Roots, Seeds, and Seedlings of Arabidopsis thaliana Columbia-0
One of the best-studied plant defense systems, the glucosinolate-myrosinase system of the Brassicales, is composed of thioglucosides known as glucosinolates and their hydrolytic enzymes, the myrosinases. Tissue disruption brings these components together, and bioactive products are formed as a consequence of myrosinase-catalyzed glucosinolate hydrolysis. Among these products, isothiocyanates ha...
متن کاملComparative investigations of the glucosinolate-myrosinase system in Arabidopsis suspension cells and hypocotyls.
Glucosinolates are secondary metabolites derived from amino acids. Upon hydrolysis by myrosinases, they produce a variety of biologically active compounds. In this study, the glucosinolate-myrosinase system was characterized in Arabidopsis suspension cells. A total of seven glucosinolates were identified and the myrosinase activity was determined. Plant suspension cells have been used as model ...
متن کاملMyrosin idioblast cell fate and development are regulated by the Arabidopsis transcription factor FAMA, the auxin pathway, and vesicular trafficking.
Crucifer shoots harbor a glucosinolate-myrosinase system that defends against insect predation. Arabidopsis thaliana myrosinase (thioglucoside glucohydrolase [TGG]) accumulates in stomata and in myrosin idioblasts (MIs). This work reports that the basic helix-loop-helix transcription factor FAMA that is key to stomatal development is also expressed in MIs. The loss of FAMA function abolishes MI...
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تاریخ انتشار 2013