Journal
SCIENTIA HORTICULTURAE
Volume 288, Issue -, Pages -Publisher
ELSEVIER
DOI: 10.1016/j.scienta.2021.110336
Keywords
Antioxidant enzymes; Compatible solutes; Grape; Growth regulator; Salinity
Categories
Funding
- Malayer University [84.5253]
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The study showed that ABA at a certain concentration can improve the morphometrical and phytochemical parameters of grapevine under salt stress conditions, enhancing the plant's ability to mitigate NaCl toxicity.
The effect of abscisic acid (ABA) at 0 and 100 mu M on some morphometrical, and phytochemical parameters and mineral nutrient changes of grapevine (Vitis vinifera L. cv. 'Sultana') were examined during ten weeks salinity stress (NaCl; 0, 25, 50 and 100 mM). At the end of first week of saline treatments, the vines were sprayed with ABA twice a day at a 12 h interval. Under saline condition, the plants height, leaves number, leaves area and shoots dry matter decreased significantly compared to the control non-saline stressed vines, but these parameters were improved in 100 mu M ABA-treated vines under saline condition. The increase in leaf electrolyte leakage, lipid peroxidation and hydrogen peroxide production in cell biomembranes caused by salinity stress were reduced in 100 mu M ABA-sprayed vines. Moreover, leaf relative water content, proline, soluble sugars, total phenolic, and flavonoids increased in these vines compared to non-ABA-treated vines under salinity condition. ABA (100 mu M) had an additive effect on leaf antioxidant enzymes (catalase, guaiacol peroxidase and ascorbate peroxidase) activities of salt-stressed vines. Salt stress affects negatively the leaf elements concentrations, however ABA (100 mu M) improved their accumulation. These ABA- induced morphometrical and phytochemical changes improved the ability of grapevine plants to mitigate NaCl toxicity under saline condition.
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