Journal
PHYTON-INTERNATIONAL JOURNAL OF EXPERIMENTAL BOTANY
Volume 92, Issue 6, Pages 1695-1711Publisher
TECH SCIENCE PRESS
DOI: 10.32604/phyton.2023.028317
Keywords
Abiotic stress; antioxidant; cold stress; plant hormone; photosynthetic pigment
Categories
Ask authors/readers for more resources
Chilling stress in Egypt reduces the productivity of banana crops, but pre-treatment with ABA can enhance the tolerance of banana shoots to chilling stress. ABA treatment keeps cell membranes stable, decreases ion leakage and lipid peroxidation, maintains photosynthetic pigment concentration, increases accumulation of soluble carbohydrates and proline, and enhances antioxidant enzyme activity, thus protecting banana shoots from chilling stress damage.
Banana is a tropical crop cultivated in warm places. Chilling stress in Egypt is making banana crops less productive. Abscisic acid (ABA), a key plant hormone, regulates metabolic and physiological processes and protects plants from a variety of stresses. In vitro growing banana shoots were pre-treated with ABA at four concentrations (0, 25, 50, and 100 mM) and chilled at 5 degrees C for 24 h, followed by a six-day recovery period at 25 degrees C. By comparing ABA treatments to both positive and negative controls, physiological and biochemical changes were investigated. Chilling stress (5 degrees C) caused a considerable increase in lipid peroxidation and ion leakage and reduced photosynthetic pigments in cold-treated plantlets. Increasing the concentration of ABA to 100 mu M enhanced the response to chilling stress. ABA had a major effect on mitigating chilling injury in banana shoots by keeping cell membranes stable and lowering the amount of ion leakage and lipid peroxidation. Also, ABA significantly maintained the photosynthetic pigment concentration of banana shoots; accumulated higher amounts of total soluble carbohydrates and proline; and increased DPPH radical scavenging activity. Furthermore, ABA treatment enhanced cold tolerance in chilling-stressed banana shoots through the regulation of antioxidant enzyme activity. Overall, the results show that ABA is a good choice for protecting banana shoots from the damage caused by chilling stress.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available