Alleviation of Negative Effects of Water Stress in Two Contrasting Wheat Genotypes by Calcium and Abscisic Acid

2002 ◽  
Vol 45 (1) ◽  
pp. 65-70 ◽  
Author(s):  
H. Nayyar ◽  
S.K. Kaushal
Keyword(s):  
Abscisic Acid ◽  
Water Stress ◽  
Negative Effects ◽  
Wheat Genotypes

scholarly journals Role of Abscisic Acid in The Water Balance of Pistachio (Pistacia. vera) Seedlings: دور حمض الابسيسيك في التوازن المائي لغراس الفستق الحلبي (Pistacia vera)

2021 ◽  
Vol 5 (5) ◽  
pp. 43-32
Author(s):  
Ibrahim Mohammad Alabdullah, Muhammad Ayman Daire, Mohamad K Ibrahim Mohammad Alabdullah, Muhammad Ayman Daire, Mohamad K
Keyword(s):  
Abscisic Acid ◽  
Water Stress ◽  
Water Balance ◽  
Pistacia Vera ◽  
Negative Effects ◽  
Polyethylene Bags ◽  
Harmful Effects ◽  
Different Levels ◽  
Acid Treatments

This experiment aims to study the effect of abscisic acid in maintaining water balance under different levels of irrigation. it was carried out in Pistachio Office on two-years-old (P.vera) seedlings growing in polyethylene bags. Three irrigation and three abscisic acid treatments were applied during 2019 and 2020 year. The results showed a significant change of water stress on most of the growth indicators (planting length - planting diameter - leaf area, etc.) which decreased and reached its lowest value when irrigation with 14-day interval between irrigation. As for abscisic acid treatments reduced significantly and avoided the harmful effects of water stress and improved the water balance of seedlings. A significant increase was observed in length of the main axis of seedlings that treated with abscisic acid (59.3 cm) compared with control plants (55.5cm) under water stress conditions, in addition to it was observed an increase in concentration of chlorophyll (38 mg/ g ww) compared to control plants (36.19 mg/ g ww), while the level of proline in the treated plants increased significantly (52.5 mg/ g ww) compared with untreated control plants (50 mg/ g ww), and these results illustrate the important role of abscisic acid in regulating water relations within the plant. And increase the plant's ability to withstand the negative effects of water stress.

Primary Root Elongation Rate and Abscisic Acid Levels of Maize in Response to Water Stress

Crop Science ◽  
2011 ◽  
Vol 51 (1) ◽  
pp. 157-172 ◽  
Author(s):  
Kristen A. Leach ◽  
Lindsey G. Hejlek ◽  
Leonard B. Hearne ◽  
Henry T. Nguyen ◽  
Robert E. Sharp ◽  
...  
Keyword(s):  
Abscisic Acid ◽  
Water Stress ◽  
Root Elongation ◽  
Primary Root ◽  
Elongation Rate ◽  
Root Elongation Rate ◽  
Response To Water

Comparative expression profiles of maize genes from a water stress-specific cDNA macroarray in response to high-salinity, cold or abscisic acid

Plant Science ◽  
2006 ◽  
Vol 170 (6) ◽  
pp. 1125-1132 ◽  
Author(s):  
Jun Zheng ◽  
Jinfeng Zhao ◽  
Jinpeng Zhang ◽  
Junjie Fu ◽  
Mingyue Gou ◽  
...  
Keyword(s):  
Abscisic Acid ◽  
Water Stress ◽  
High Salinity ◽  
Expression Profiles ◽  
Cdna Macroarray

Inhibition of cambial activity in Abies balsamea by internal water stress: role of abscisic acid

1975 ◽  
Vol 53 (24) ◽  
pp. 3041-3050 ◽  
Author(s):  
C. H. A. Little
Keyword(s):  
Abscisic Acid ◽  
Water Stress ◽  
Indoleacetic Acid ◽  
Stomatal Closure ◽  
Abies Balsamea ◽  
Cambial Activity ◽  
Inhibitory Effect ◽  
Internal Water ◽  
Endogenous Aba

In experiments with attached and detached shoots of balsam fir, Abies balsamea L., synthetic (±)abscisic acid (ABA) (1) reduced photosynthesis and transpiration by inducing stomatal closure, (2) inhibited indoleacetic acid (IAA) - induced cambial activity in photosynthesizing and non-photosynthesizing shoots, and (3) inhibited the basipetal movement of [14C]IAA. Neither gibberellic acid nor kinetin counteracted the inhibitory effect of (±)ABA on IAA-induced cambial activity. In addition it was demonstrated that increasing the internal water stress increased the level of endogenous ABA in the phloem–cambial region of bark peelings and decreased the basipetal movement of [14C]IAA through branch sections. On the basis of these findings it is proposed that internal water stress inhibits cambial activity, partly through increasing the level of ABA; the ABA acts to decrease the provision of carbohydrates and auxin that are required for cambial growth.

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