Abstract:
Purslane (Portulaca oleraceae L.) is a succulent plant with fleshy leaves which grow prostrate or erect depending on availability of light. During evolution, the plant developed complex multiple strategies to overcome the adverse environment conditions. A pot experiment was conducted to determine the change in growth and biochemical aspects of purslane exogenously treated with glycine (amino acid) and exposed to heat stress. The seeds were obtained from Government College University Faisalabad, Pakistan. The experimental layout was completely randomized design with four replicates. Seed were sown in plastic pots filled with sandy loam soil. Pots were kept in normal sunlight. After 25 days of germination, glycine was applied exogenously in different concentrations (0, 0.5, 1 mM). Temperature stress was applied after 40 days of germination in two conditions i.e., 25 °C (control) and 35 °C (heat stress). The data for various growth and biochemical attributes were collected after 60 days' plant growth. The collected data was subjected to analysis of variance (ANOVA). Our results revealed that temperature stress reduced shoot length, number of leaves, chlorophyll contents, leaf water content and H2O2, while heat stress increased the enzymatic activity of catalase (CAT) and peroxidase (POD). However, the exogenous glycine increased shoot length, number of leaves, and concentrations of phenolic, flavonoids, total reducing sugars, anthocyanins, amino acids and ascorbic acid as well as the activities of CAT and POD in purslane plants. In conclusion, the exogenous foliar application of glycine mitigated the damaging effects of temperature stress and increased the antioxidants activity of purslane.
Page(s):
123-123
DOI:
DOI not available
Published:
Journal: Abstract Book on Second International Conference on Recent Approaches in Plant Sciences (RAPS-23) 4-5 May 2023 , Volume: 0, Issue: 0, Year: 2023
Keywords:
Purslane
,
mitigate
,
Biochemical attributes
,
prostrate