scholarly journals Influence of water stress and abscisic acid on free proline accumulation in barley leaves

2013 ◽  
Vol 36 (1-2) ◽  
pp. 59-65 ◽  
Author(s):  
Hanna Chełkowska ◽  
Danuta Zielińska
Keyword(s):  
Abscisic Acid ◽  
Water Stress ◽  
Osmotic Stress ◽  
Threshold Value ◽  
Proline Accumulation ◽  
Proline Content ◽  
Free Proline ◽  
Rapid Accumulation ◽  
Influence Of Water ◽  
Barley Leaves

Rapid accumulation of free proline was found in barley leaves under conditions of osmotic stress at the level of -8.3 bars, but not before 9 days of its duration. The threshold value of osmotic stress for the start of a rapid accumulation of proline was about -6 bars. The excised leaves of barley subjected to water stress by wilting accumulated free proline more rapidly. In the course of 24 hours free proline content increased about 30-fold, while the water content in the leaves decreased 3-fold only. We found also that excised barley leaves with full turgor treated with abscisic acid (10<sup>-4</sup> M) accumulated free proline as early as after 3 hours and subsequently after 24 hours free proline content increased 10-fold.

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.

The effect of three osmotic agents on free proline and amino acid pools in Atriplex canescens and Hilaria jamesii

1987 ◽  
Vol 65 (4) ◽  
pp. 799-801 ◽  
Author(s):  
William A. Cress ◽  
Gordon V. Johnson
Keyword(s):  
Polyethylene Glycol ◽  
Water Stress ◽  
Plant Species ◽  
Arid Region ◽  
Proline Content ◽  
Metabolic Effects ◽  
Free Proline ◽  
Atriplex Canescens ◽  
Polyethylene Glycol 4000 ◽  
Osmotic Agents

Three commonly used osmotic agents, mannitol, sucrose, and polyethylene glycol 4000, were used to simulate water stress in two arid region plant species, Hilaria jamesii (Torr.) Benth. and Atriplex canescens (Pursh) Nutt. Large amounts of mannitol (300–1400 μmol/g dry wt.) and sucrose (450–660 μmol/g dry wt.) were absorbed by both plant species, while insignificant amounts of polyethylene glycol 4000 were absorbed. During osmotic stress, Hilaria jamesii accumulated large quantities of proline, while A. canescens accumulated only a small amount. Shoot proline content of both species varied significantly with the osmotic agents used to simulate water stress. These results indicate that use of absorbable osmotic agents to simulate water stress may have important metabolic effects on the concentration of free proline and other metabolites.

scholarly journals PHYSIOLOGICAL CHANGES ASSOCIATED WITH WATER STRESS IN SWEETPOTATOES

HortScience ◽  
1992 ◽  
Vol 27 (6) ◽  
pp. 682d-682
Author(s):  
James Q. Garner ◽  
Thammasak Thongket
Keyword(s):  
Soil Moisture ◽  
Fatty Acid ◽  
Water Stress ◽  
Water Potential ◽  
Proline Accumulation ◽  
Proline Content ◽  
Genotypic Differences ◽  
Physiological Changes ◽  
Diffusive Resistance ◽  
Fatty Acid Compositions

Proline content, leaf water potential (LWP), and leaf diffusive resistance (LDR) were determined for eight sweetpotato genotypes underwater stress conditions. Changes in fatty acid compositions of leaf polar lipids were determined in two sweetpotato genotypes during declining soil moisture. Proline did not accumulate and LWP did not decrease until soil moisture dropped below 10%, but LDR increased as soil moisture decreased. Genotypic differences in proline accumulation and LWP were found. Changes in fatty acid compositions occurred more in glycolipids than in phospholipids. Fatty acid changes were more pronouned in genotype MS20-2 than in “Vardaman”

scholarly journals KARAKTER MORFOLOGI DAN FISIOLOGI TAPAK DARA (Vinca rosea L.) PADA BEBERAPA CEKAMAN AIR

2020 ◽  
Vol 6 (2) ◽  
pp. 50
Author(s):  
SUKARMAN SUKARMAN ◽  
I. DARWATI ◽  
D. RUSMiN
Keyword(s):  
Water Stress ◽  
Plant Height ◽  
Morphological Characteristics ◽  
Dry Weight ◽  
Proline Content ◽  
Physiological Characteristics ◽  
Free Proline ◽  
Vinca Rosea ◽  
Medicinal Crops ◽  
Risk Of Cancer

<p><strong>Morphological and physiological characteristics of Vinca at di fferent water stress levels</strong></p><p>Vinca (Vinca rosea L.) is one of the important medicinal crops as the sources of raw materials for traditional medicines. Its alkaloid is believed can reduce the risk of cancer, blood tension and diabetes diseases. Recently, vinca is only grown as ornamental plant in the garden, therefore, its cultivation methods is limited, especially its water stress tolerance, lite purpose of this experiment was to study the effect of water stess on the morphological and physiological characteristics of vinca. A pot experiment was conducted in the plastics house of the Research Institute for Spice and Medicinal Crops from November 1997 to March 1998. Factorial experiment consisted two factors and three replications was arranged in a randomized block design. Ihe irst factor consisted of two vinca varieties, those wee white flowers (WFV) and red flowers of vinca (RFV). While 4 different levels of water stress i.e., (I) 100% ield capacity (FC), (2) 80% FC, (3) 60% FC, and (4) 40% FC were used as the second factor. Parameters used for evaluating the effect of teatment consisted of morphological characteristics such as (I) plant height, (2) number of primary branches, (3) number of leaves, (4) leaf area (5) dry weight of stem, (6) dry weight of leaf, (7) dry weight of flowers and (8) dry weight of roots, and physiological characteristics observed including: (I) percentages of opened stomata and (2) free proline content of leaf. Results showed that interaction between varieties and water stress did not significantly affect the morphological nor physiological characteristics. Varieties significantly affected the morphological characteristics (except plant height), however they did not signiicantly affect physiological characteristics. Water stress significantly affected the morphological (except dry weight of roots) and free proline contents. Under 80% FC, vinca produced the highest growth and dry weight of plant however, the plant growth and dry weight wee inhibited under 60 and 40% FC. Under 40% FC, percentages of opened stomata deceased signiicantly. Moeover, proline content in the leaves signiicantly increased by water stess treatments.</p>

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