scholarly journals The Catabolism of (±)-Abscisic Acid by Excised Leaves of Hordeum vulgare L. cv Dyan and Its Modification by Chemical and Environmental Factors

1987 ◽  
Vol 84 (1) ◽  
pp. 157-163 ◽  
Author(s):  
A. Keith Cowan ◽  
Ian D. Railton
Keyword(s):  
Abscisic Acid ◽  
Hordeum Vulgare ◽  
Environmental Factors ◽  
Hordeum Vulgare L

scholarly journals Abscisic Acid—Enemy or Savior in the Response of Cereals to Abiotic and Biotic Stresses?

2020 ◽  
Vol 21 (13) ◽  
pp. 4607 ◽  
Author(s):  
Marta Gietler ◽  
Justyna Fidler ◽  
Mateusz Labudda ◽  
Małgorzata Nykiel
Keyword(s):  
Abscisic Acid ◽  
Stress Response ◽  
Environmental Factors ◽  
Triticum Aestivum L ◽  
Biotic And Abiotic Stress ◽  
Hordeum Vulgare L ◽  
Abiotic And Biotic Stresses ◽  
Biotic Stresses ◽  
Aba Content

Abscisic acid (ABA) is well-known phytohormone involved in the control of plant natural developmental processes, as well as the stress response. Although in wheat (Triticum aestivum L.) and barley (Hordeum vulgare L.) its role in mechanism of the tolerance to most common abiotic stresses, such as drought, salinity, or extreme temperatures seems to be fairly well recognized, not many authors considered that changes in ABA content may also influence the sensitivity of cereals to adverse environmental factors, e.g., by accelerating senescence, lowering pollen fertility, and inducing seed dormancy. Moreover, recently, ABA has also been regarded as an element of the biotic stress response; however, its role is still highly unclear. Many studies connect the susceptibility to various diseases with increased concentration of this phytohormone. Therefore, in contrast to the original assumptions, the role of ABA in response to biotic and abiotic stress does not always have to be associated with survival mechanisms; on the contrary, in some cases, abscisic acid can be one of the factors that increases the susceptibility of plants to adverse biotic and abiotic environmental factors.

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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