vEvaluation of the effect of vermicompost and salinity stress on the pigments content and some biochemical characteristics of Borage (Borago Officinalis L.)
2019
Afkari, Ahmad | Farajpour, Parvin
In order to investigate the effects of salinity and vermicompost on the antioxidant enzymes activity and photosynthetic pigments of Borage officinalis L., a factorial experiment was carried out in a completely randomized design with four replications in 2015. The study treatments consist of four vermicompost levels (0, 5, 10, and 15% wt potted soil in dry weight) and four salinity levels 0 (control), 4, 8, and 12 ds/m sodium chloride. The results of analysis of variance showed a considerable influence of salinity stress and vermicompost on the activity level of superoxide dismutase, ascorbate peroxidase, glutathione peroxidase, catalase, and total chlorophyll enzymes. Other results indicated that with increasing salinity, the activity level of antioxidant enzymes and photosynthetic pigments increased and decreased, respectively. Also, use of vermicompost fertilizer raised the levels of chlorophyll a, chlorophyll b, and carotenoids significantly compared to the control. Comparison of means of the interactions between salinity stress and vermicompost showed that the maximum antioxidant enzymes activity was obtained in 15 wt % vermicompost treatment at the salinity level of 12 ds/m NaCl. Therefore, the use of vermicompost as an organic fertilizer, in addition to increasing the activity of antioxidant enzymes and photosynthetic pigments, can be a good way to reduce the negative effects of high levels of sodium and chloride ions in soils on the growth of borage.
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