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Pak. J. Bot., 47(3): 1167-1176, 2015. |
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Updated: 23-06-15 | ||||
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ALLEVIATION OF ADVERSE IMPACT OF SALT IN PHASEOLUS VULGARIS L. BY ARBUSCULAR MYCORRHIZAL FUNGI
ABD_ALLAH, E.F.1*, HASHEM ABEER2,3, ALQARAWI, A.A.1 AND ALWHIBI MONA, S.2
Abstract: The present study was undertaken to evaluate the possible role of arbuscular mycorrhizal fungi (AMF) in enhancing the salt (0, 0.15; 0.25 M NaCl) tolerance in Phaselous vulgaris. The impact of AMF in presence and absence of salt stress was studied on growth, nodulation, and attributes of systemic acquired resistance in P. vulgaris. The results suggested that salinity caused significant decrease in growth performance, nodulation, pigment system, tissue water content, and membrane stability index. Also, salt stress caused significant decrease in phytohormones , polyamines, membrane stability index and tissue water content of P. vulgaris. On the other hand, lipid peroxidation (malondialdehyde), total phenol content and antioxidant enzymes (catalase, peroxidase, superoxide dismutase, ascorbate peroxidase, glutathione reductase) increases as salt concentration increases. The accumulations of sodium, chlorine were significantly increased by salt stress, however the concentration of potassium, phosphorous and calcium decreased. Overall, the results indicate that AMF alleviate the adverse impact of salinity on the plant growth, anabolic physiological attributes and nutrient uptake by reducing the oxidative damage of salt through strengthening and modulation the systemic acquired resistance.
Key words: Common bean; Salinity; Growth; Pigments; Phytohormones; Polyamines; Antioxidant defense system; Ion accumulation.
1Plant Production Department, College of Food and Agricultural Sciences, King Saud University, P.O. Box. 2460 Riyadh 11451, Saudi Arabia 2Botany and Microbiology Department, College of Science, King Saud University, P.O. Box. 2460 Riyadh 11451, Saudi Arabia 3Mycology and Plant Disease Survey Department, Plant Pathology Research Institute, Agriculture Research Center, Giza, Egypt. *Corresponding author: eabdallah@ksu.edu.sa |
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