Effect of interaction Triacontanol and arsenic on the growth and some biochemical and physiological properties of soybean (Glycine max L)

Triacontanol (TRIA), as a plant growth regulators has significant biological effects on plant growth and development, Including increased resistance of plants to environmental stresses. The effect of concentration as (0, 5 and 10 μM TRIA) in physiological changes induced by treatment (300 μM) of arsenic in soybean plants were studied in a completely randomized design. After measuring the rate of growth (dry weight of roots and shoots, leaf area and plant height), the photosynthetic pigments (chlorophyll and carotenoids), proline content, soluble sugar, protein and MDA in leaf was found that much of an impact TRIA these indicators have been in the absence of arsenic, and in the presence of arsenic, growth, photosynthetic pigments content, protein content and antioxidant activities of catalase, ascorbate peroxidase and guaiacol peroxidase somewhat increased while the amount of substance in the leaves is reduced. So TRIA by increasing the activity of antioxidant enzymes to maintain the integrity of biological membranes of plants and reduce the content of reactive oxygen species. This promoting plant tolerance to arsenic acid.