Effects of ascorbic acid on some physiological changes of pepino (Solanum muricatumAit.) under chilling stress

Abstract

In this study, the changes caused by chilling stress on some physiological parameters of pepino (Solanum muricatum Ait.) plant and the effects of ascorbic acid (100 mM) applied exogenously on these changes were examined. For this purpose, the photosynthetic pigments (chlorophyll a, chlorophyll b, total chlorophylls and carotenoids), ascorbic acid, total phenolic compounds, malondialdehyde and proline contents in leaves of pepino taken on 5 th and 10 th days were determined. As a result of chilling stress, it was found that while the photosynthetic pigments and proline contents decreased in pepino leaves, the ascorbic acid, total phenolic compounds and malondialdehyde contents increased. In plants which were subjected to pre-treatment of ascorbic acid on the 10 th day of stress, ascorbic acid and proline contents increased while a decrease was observed in malondialdehyde content, compared to stress group without pre-treated. This study may be important for explaining resistance induced by treatment of exogenous ascorbic acid in pepino exposed to chilling stress.

Cold stress changes antioxidant defense system, phenylpropanoid contents and expression of genes involved in their biosynthesis in Ocimum basilicum L.

“…TPC significantly enhanced in lettuce leaf basil exposed to 6 °C 13 . Sivaci et al 31 demonstrated the association of plant response to stress stimuli with the levels of phenolic compounds. A substantial increments in soluble phenolic concentrations have been also indicated in tomato and watermelon plants grown in chilling conditions.…”

Effects of temperature stress on the accumulation of ascorbic acid and folates in sweet corn (Zea mays L.) seedlings

“…As such, enzymatic and non‐enzymatic protective mechanisms have been reported for the scavenging of the over‐generated ROS under oxidative stress. The activities of antioxidative enzymes such as superoxide dismutase and ascorbate peroxidase have been shown to be increased for detoxifying ROS in Lens culinaris seedlings at 40–45 °C treatment, and antioxidative compounds such as ascorbic acid (AsA) protected Solanum muricatum seedlings from oxidative stress at 10 °C . Exploring the changing mechanism of crops under high and low temperature stress is therefore meaningful for enhancing yield and production.…”

Sequential Response of Sage Antioxidant Metabolism to Chilling Treatment

“…The analysis of the main effects ( p ≤ 0.001) proved that low temperature generally increased the content of malondialdehyde in both sage cultivars (Table 1). Preliminary results did not confirm such a relationship in sage [26]; however, Sivaci et al [17] described an increase in MDA content in chilled pepino plants in comparison to the control. Overall, our findings showed that overproduction of MDA occurred on the 12–14th day of chilling treatment.…”

“…Cheng et al [13] described similar patterns of glutathione and ascorbate concentration changes in watermelon plants up to the 3rd day of chilling, but later, the ascorbate content remained stable, while the glutathione content increased until the 7th day. Sivaci et al [17] showed an increase in ascorbic acid and total phenolics content between the 5th and 10th day of chilling of pepino, while the level of carotenoid compounds decreased on the 5th day in comparison to control plants and then their concentration was similar to the control. Proietti et al [18] did not find significant changes in ascorbate content between chilled and control spinach on the 2nd day of chilling, but later it started to rise and reached the maximum after seven days, with a 41% increase with respect to control leaves.…”