Jasmonate

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The jasmonates (JAs) are a group of plant hormones which help regulate plant growth and development. Jasmonates include jasmonic acid and its esters, such as methyl jasmonate. Like the related prostaglandin hormones found in mammals, the jasmonates are cyclopentanone derivatives which are derived biosynthetically from fatty acids. They are biosynthesized from linolenic acid by the octadecanoid pathway.

Contents 1 Location, characteristics and occasions for synthesis induction 2 Effects 3 See also 4 Reference

[edit] Location, characteristics and occasions for synthesis induction

• Desiccation
• Effect of elevated ABA levels
• JA-induced proteins are lacking in the roots, in bleached leaves, and in leaves that are chlorophyll-deficient

[edit] Effects

• These chemicals can inhibit growth if the concentration is high; growth promotion is induced, however, in very low concentrations.

• They stimulate wound response in plants and possibly induce plant defense.

• They inhibit germination but promote senescence, tuber formation, pigment formation, fruit ripening and fruit abscission.

• Jasmonates have been proposed to be signaling intermediates in the wound and/or elicitor-activated expression of plant defense genes.

[edit] See also

• Jasmone

[edit] Reference

• Plant Hormones: Table of Characteristics
• Robert A. Creelman and ­ John E. Mullet (1997). "Biosynthesis and Action of Jasmonate in Plants". Annual Review of Plant Physiology and Plant Molecular Biology 48: 355-381. DOI:10.1146/annurev.arplant.48.1.355. 
• G. Sembdner, B. Parthiere (1993). "The Biochemistry and the Physiological and Molecular Actions of Jasmonates". Annual Review of Plant Physiology and Plant Molecular Biology 44: 569-589. DOI:10.1146/annurev.pp.44.060193.003033.