Impact of Antioxidant Enzymes and Physiological Indices as Selection Criteria for Drought Tolerance in Sesame Populations

2017 ◽  
Vol 3 (2) ◽  
pp. 25-34
Author(s):  
Tarek Youssef Bayoumi ◽  
Eman T. Abdou ◽  
Samar A. M. Elshakhess
Keyword(s):  
Antioxidant Enzymes ◽  
Drought Tolerance ◽  
Selection Criteria ◽  
Physiological Indices

scholarly journals Selection criteria for drought tolerance at the vegetative phase in early maturing maize

2016 ◽  
Vol 15 (20) ◽  
pp. 816-822 ◽  
Author(s):  
O Akinwale R ◽  
A B Fakorede M ◽  
Oluwaranti A ◽  
Badu Apraku B ◽  
I Adejumobi I
Keyword(s):  
Drought Tolerance ◽  
Selection Criteria ◽  
Vegetative Phase ◽  
Early Maturing

scholarly journals Exopolysaccharides Producing Bacteria for the Amelioration of Drought Stress in Wheat

2020 ◽  
Vol 12 (21) ◽  
pp. 8876
Author(s):  
Noshin Ilyas ◽  
Komal Mumtaz ◽  
Nosheen Akhtar ◽  
Humaira Yasmin ◽  
R. Z. Sayyed ◽  
...  
Keyword(s):  
Antioxidant Enzymes ◽  
Drought Stress ◽  
Drought Tolerance ◽  
Indole Acetic Acid ◽  
Stress Hormones ◽  
Carotenoid Content ◽  
Bacterial Strains ◽  
Morphological Attributes ◽  
Vigor Index

This research was designed to elucidate the role of exopolysaccharides (EPS) producing bacterial strains for the amelioration of drought stress in wheat. Bacterial strains were isolated from a farmer’s field in the arid region of Pakistan. Out of 24 isolated stains, two bacterial strains, Bacillus subtilis (Accession No. MT742976) and Azospirillum brasilense (Accession No. MT742977) were selected, based on their ability to produce EPS and withstand drought stress. Both bacterial strains produced a good amount of EPS and osmolytes and exhibited drought tolerance individually, however, a combination of these strains produced higher amounts of EPS (sugar 6976 µg/g, 731.5 µg/g protein, and 1.1 mg/g uronic acid) and osmolytes (proline 4.4 µg/mg and sugar 79 µg/mg) and significantly changed the level of stress-induced phytohormones (61%, 49% and 30% decrease in Indole Acetic Acid (IAA), Gibberellic Acid (GA), and Cytokinin (CK)) respectively under stress, but an increase of 27.3% in Abscisic acid (ABA) concentration was observed. When inoculated, the combination of these strains improved seed germination, seedling vigor index, and promptness index by 18.2%, 23.7%, and 61.5% respectively under osmotic stress (20% polyethylene glycol, PEG6000). They also promoted plant growth in a pot experiment with an increase of 42.9%, 29.8%, and 33.7% in shoot length, root length, and leaf area, respectively. Physiological attributes of plants were also improved by bacterial inoculation showing an increase of 39.8%, 61.5%, and 45% in chlorophyll a, chlorophyll b, and carotenoid content respectively, as compared to control. Inoculations of bacterial strains also increased the production of osmolytes such asproline, amino acid, sugar, and protein by 30%, 23%, 68%, and 21.7% respectively. Co-inoculation of these strains enhanced the production of antioxidant enzymes such as superoxide dismutase (SOD) by 35.1%, catalase (CAT) by 77.4%, and peroxidase (POD) by 40.7%. Findings of the present research demonstrated that EPS, osmolyte, stress hormones, and antioxidant enzyme-producing bacterial strains impart drought tolerance in wheat and improve its growth, morphological attributes, physiological parameters, osmolytes production, and increase antioxidant enzymes.

scholarly journals Selection criteria for assessing drought tolerance in a segregating population of flax (Linum usitatissimum L.)

2016 ◽  
Author(s):  
Parvaneh Asgarinia ◽  
Aghafakhr Mirlohi ◽  
Ghodratollah Saeidi ◽  
Ali Akbar Mohamadi Mirik ◽  
Mahdi Gheysari ◽  
...  
Keyword(s):  
Drought Tolerance ◽  
Linum Usitatissimum ◽  
Selection Criteria ◽  
Linum Usitatissimum L ◽  
Segregating Population

Relationship between drought tolerance with activities of antioxidant enzymes in sugarcane

2015 ◽  
Vol 20 (2) ◽  
pp. 145-150 ◽  
Author(s):  
N. Ngamhui ◽  
N. Tantisuwichwong ◽  
S. Roytrakul ◽  
Y. J. Zhu ◽  
Q. X. Li ◽  
...  
Keyword(s):  
Antioxidant Enzymes ◽  
Drought Tolerance

scholarly journals Effects of salicylic acid, zinc and glycine betaine on morpho-physiological growth and yield of maize under drought stress

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Ramadan Shemi ◽  
Rui Wang ◽  
El-Sayed M. S. Gheith ◽  
Hafiz Athar Hussain ◽  
Saddam Hussain ◽  
...  
Keyword(s):  
Salicylic Acid ◽  
Antioxidant Enzymes ◽  
Drought Stress ◽  
Gas Exchange ◽  
Drought Tolerance ◽  
Glycine Betaine ◽  
Field Capacity ◽  
Yield Attributes ◽  
Chlorophyll Contents ◽  
Water Conditions

AbstractDrought is one of the major environmental stresses that negatively affect the maize (Zea mays L.) growth and production throughout the world. Foliar applications of plant growth regulators, micronutrients or osmoprotectants for stimulating drought-tolerance in plants have been intensively reported. A controlled pot experiment was conducted to study the relative efficacy of salicylic acid (SA), zinc (Zn), and glycine betaine (GB) foliar applications on morphology, chlorophyll contents, relative water content (RWC), gas-exchange attributes, activities of antioxidant enzymes, accumulations of reactive oxygen species (ROS) and osmolytes, and yield attributes of maize plants exposed to two soil water conditions (85% field capacity: well-watered, 50% field capacity: drought stress) during critical growth stages. Drought stress significantly reduced the morphological parameters, yield and its components, RWC, chlorophyll contents, and gas-exchange parameters except for intercellular CO2 concentration, compared with well water conditions. However, the foliar applications considerably enhanced all the above parameters under drought. Drought stress significantly (p < 0.05) increased the hydrogen peroxide and superoxide anion contents, and enhanced the lipid peroxidation rate measured in terms of malonaldehyde (MDA) content. However, ROS and MDA contents were substantially decreased by foliar applications under drought stress. Antioxidant enzymes activity, proline content, and the soluble sugar were increased by foliar treatments under both well-watered and drought-stressed conditions. Overall, the application of GB was the most effective among all compounds to enhance the drought tolerance in maize through reduced levels of ROS, increased activities of antioxidant enzymes and higher accumulation of osmolytes contents.

Evaluation of physiological traits as indirect selection criteria for drought tolerance in sugar beet

2005 ◽  
Vol 91 (2-3) ◽  
pp. 231-249 ◽  
Author(s):  
Eric S. Ober ◽  
Mich Le Bloa ◽  
Chris J.A. Clark ◽  
Andy Royal ◽  
Keith W. Jaggard ◽  
...  
Keyword(s):  
Drought Tolerance ◽  
Sugar Beet ◽  
Selection Criteria ◽  
Indirect Selection ◽  
Physiological Traits

Interaction of ACC deaminase and antioxidant enzymes to induce drought tolerance in Enterobacter cloacae 2WC2 inoculated maize genotypes

2020 ◽  
Vol 53 (3) ◽  
Author(s):  
Saman Maqbool ◽  
Amna Amna ◽  
Ammarah Maqbool ◽  
Shehzad Mehmood ◽  
Muhammad Suhaib ◽  
...  
Keyword(s):  
Antioxidant Enzymes ◽  
Drought Tolerance ◽  
Acc Deaminase ◽  
Enterobacter Cloacae ◽  
Maize Genotypes
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