PJB-2025-338
SALT STRESS ALLEVIATION IN FRAGARIA ANANASSA L. PLANTS BY FOLIAR APPLICATION OF ASCORBIC ACID
SAMRA HAIDER
Abstract
Foliar application of ascorbic acid (AsA) was investigated to combat the salinity stress on strawberry plants. Plants grown in the plastic pots were irrigated with various concentrations of NaCl (0, 50, 100, and 200 mM) to induce salinity stress. Simultaneously, ascorbic acid solutions (0, 0.5, 1 mM) were sprayed on plants at regular intervals of seven days over a period of 42 days. The results revealed that most of the vegetative growth and reproductive growth attributes drastically reduced under salt stress specifically at 200 mM salt concentration. The application of ascorbic acid mitigated the effects of salt and almost all the vegetative growth parameters such as stem diameter, leaf length, leaf width and number of leaves exhibited an increased by foliar application of 1 mM ascorbic acid. The reproductive growth attributes except number of flowers however, could also not exhibit noticeable increase upon application of ascorbic acid on salt treated plants. Protein contents of strawberry plants which decreased under NaCl treatment also could not increase on ascorbic acid application. Similarly, the activities of antioxidant enzymes superoxidase dismutase (SOD) and peroxidases (POD) could not demonstrate distinct results in ascorbic acid treated plants which were grown under salt stress. The outcomes of this investigation indicated that higher concentrations of ascorbic acid than 1 mM should be investigated to see their effect on enhancement of different growth attributes with a significant difference.
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