The metabolism of abscisic acid in relation to its reversible action on stomata in leaves of Hordeum vulgare L.

Planta ◽  
1973 ◽  
Vol 114 (2) ◽  
pp. 159-167 ◽  
Author(s):  
W. R. Cummins
Keyword(s):  
Abscisic Acid ◽  
Hordeum Vulgare ◽  
Hordeum Vulgare L

Induction of Hydroxycinnamic Acid Amides and Tryptophan by Jasmonic Acid, Abscisic Acid and Osmotic Stress in Barley Leaves

2001 ◽  
Vol 56 (3-4) ◽  
pp. 193-202 ◽  
Author(s):  
Yuki Ogura ◽  
Atsushi Ishihara ◽  
Hajime Iwamura
Keyword(s):  
Abscisic Acid ◽  
Hordeum Vulgare ◽  
Osmotic Stress ◽  
Jasmonic Acid ◽  
Secondary Metabolism ◽  
Hydroxycinnamic Acid ◽  
Spectroscopic Methods ◽  
Hordeum Vulgare L ◽  
Hydroxycinnamic Acid Amides ◽  
Barley Leaves

AbstractThe effects of jasmonic acid (JA) and abscisic aid (ABA) on secondary metabolism in barley (Hordeum vulgare L.) were investigated. Treatment with JA at 100 μᴍ for 48 h induced accumulation of four compounds in barley primary leaves. The accumulation of these com­pounds was also observed after treatment with ABA at 100 μᴍ. The induced compounds were identified as p-coumaroylputrescine, p-coumaroylagmatine, p-coumaroyl-3-hydroxyagmatine and tryptophan by spectroscopic methods. The profiles of compounds induced by application of JA and ABA were different. JA exhibited stronger inducing activity for hydroxycinnamic acid amides than ABA, while ABA was more active in tryptophan accumulation. The major hydroxycinnamic acid amides in JA-and ABA-treated leaves were p-coumaroylagmatine and p-coumaroyl-3-hydroxyagmatine, respectively. These differences suggested that JA and ABA act in distinct modes. The induction of these compounds was also observed in leaf segments treated with 1 ᴍ sorbitol and glucose. These findings suggested that JA and ABA are involved in accumulation of hydroxycinnamic acid amides and tryptophan in response to osmotic stress in barley.

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