scholarly journals Stress Metabolism V. Abscisic Acid and Nitrogen Metabolism in Barley and Lolium Temulentum L.

1973 ◽  
Vol 26 (2) ◽  
pp. 319 ◽  
Author(s):  
D Aspinall ◽  
TN Singh ◽  
LG Paleg
Keyword(s):  
Abscisic Acid ◽  
Root System ◽  
Nitrogen Metabolism ◽  
Free Proline ◽  
Lolium Temulentum

Spraying a solution of abscisic acid (ABA) of O� 5 or 5� 0 ,..g/ml onto intact barley plants led to an accumulation of free proline in the leaves in certain experiments, as did suspension of the root system in an ABA solution. Proline did not accumulate in the roots of intact barley so treated even when the hormone was taken into the plant through the roots.

Proline accumulation in flooded and wilted sunflower and the effects of benzyladenine and abscisic acid

1975 ◽  
Vol 53 (23) ◽  
pp. 2893-2896 ◽  
Author(s):  
Robert L. Wample ◽  
J. Derek Bewley
Keyword(s):  
Abscisic Acid ◽  
Water Stress ◽  
Foliar Application ◽  
Proline Accumulation ◽  
Free Proline

Sunflower accumulates proline in its aerial and subterranean parts when subjected to water stress. Decreases in the proline pool on recovery are slow. Plants that wilted in darkness do not accumulate proline, and plants that are subjected to a 16-h photoperiod and are sprayed with benzyladenine also show reduced accumulation. Flooded plants show increases in their endogenous free-proline pool, which can be reduced by aeration of the roots or by foliar application of benzyladenine. Abscisic acid does not induce free-proline accumulation in unstressed plants.

scholarly journals Foliar Accumulation of Melatonin Applied to the Roots of Maize (Zea mays) Seedlings

Biomolecules ◽  
2019 ◽  
Vol 9 (1) ◽  
pp. 26 ◽  
Author(s):  
Young Yoon ◽  
Minjae Kim ◽  
Woong Park
Keyword(s):  
Zea Mays ◽  
Salicylic Acid ◽  
Abscisic Acid ◽  
Root System ◽  
Plant Hormones ◽  
Time Course ◽  
Stomatal Closure ◽  
Uptake System ◽  
Regulatory Molecule ◽  
Transpirational Flow

Plants absorb melatonin from the environments as well as they synthesize the regulatory molecule. We applied melatonin to the roots of maize (Zea mays) seedlings and examined its accumulation in the leaves. Melatonin accumulation in the leaves was proportional to the exogenously applied concentrations up to 5 mM, without saturation. Time-course analysis of the accumulated melatonin content did not show an adaptable (or desensitizable) uptake system over a 24-h period. Melatonin accumulation in the leaves was reduced significantly by the plant hormones abscisic acid (ABA) and salicylic acid (SA), which commonly cause stomatal closure. The application of ABA and benzo-18-crown-6 (18-CR, a stomata-closing agent) induced stomatal closure and simultaneously decreased melatonin content in the leaves. When plants were shielded from airflow in the growth chamber, melatonin accumulation in the leaves decreased, indicating the influence of reduced transpiration. We conclude that melatonin applied exogenously to the root system is absorbed, mobilized upward according to the transpirational flow, and finally accumulated in the leaves.

scholarly journals Changes with Aging of Endogenous Abscisic Acid and Zeatin Riboside in the Root System of Rice.

1996 ◽  
Vol 65 (4) ◽  
pp. 686-692 ◽  
Author(s):  
Kang Su KWAK ◽  
Morio IIJIMA ◽  
Akira YAMAUCHI ◽  
Yasuhiro KONO
Keyword(s):  
Abscisic Acid ◽  
Root System ◽  
Zeatin Riboside ◽  
Endogenous Abscisic Acid
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