Effect of salicylic acid and gibberellin on yield and yield components of Mungbean (Vigna radiata)

پژوهش‌های حبوبات ایران

Article 9, Volume 7, Issue 2, December 2017, Pages 138-151   

Document Type: Original Articles

DOI: 10.22067/ijpr.v7i2.45907

Authors

Mojtaba Keikha¹; Mohsen Noori²; Abbas Keshtehgar^{* 2}

¹Islamic Azad University of Zahedan

²Higher Educational Complex of Saravan

Abstract

Introduction
The plant hormones such as salicylic acid and gibberellin can affect the quantity and quality of crops. External application of plant growth regulators as a strategy for improving salt tolerance in plants is discussed. Foreign Salicylic acid can regulate antioxidant enzyme activity and increase plant resistance to abiotic stresses. Salicylic acid reduction due to ethylene through the effect on the mechanisms of enzymatic and non-enzymatic of plant improves oxidative stress protection. Gibberellic acid increased amylase activity in the cotyledons of mung bean seedlings. Gibberellin are for the elongation of cells in the embryo and endosperm during seed germination.

Materials and Methods
In order to evaluate the effect of salicylic acid and gibberellin on yield and yield components of mung bean, an experiment was conducted using factorial experiment in the form of RCBD with three replications at Research Farm of Agro-Industry Center of Goharkooh Khash (Iran) in 2014. In this experiment salicylic acid was used at four different concentrations including A1 (0 ppm [control]), A2 (25 ppm), A3 (50 ppm) and A4 (100 ppm) as first factor and gibberellin in three different concentrations B1 (0 ppm [control]), B2 (50 ppm) and B3 (100 ppm) as second factor. Agricultural traits including plant height, forage yield, dry matter yield, grain yield, 1000 seed weight and harvest index.

Results and Discussions
The results showed that in the treatment of 50 ppm of salicylic acid the highest dry matter yield was obtained by 1837 kg per hectare and 49% increase compared to the control, 513.3 kg per hectare grain yield by 36.19% increase compared to control, and harvest index also amounted to 27.11 percent compared to the control was 30/76%. In the treatment of 100 ppm gibberellin best dry matter yield by 1469.36 kg per hectare and 20.9% increase compared with the control, grain yield by 508.08 kg per hectare yield and 31.09% increase compared to control, and harvest index by 25.66 percent and 20.45% compared to control increased, respectively. It seems that salicylic acid and gibberellin increased cell division in the meristem plantlets and thus improved the plant growth. Salicylic acid and gibberellin through proper inflammatory cells, increase division, elongation and cell differentiation, the allocation of the substances synthesized for growth and prolong the period of growth may rise to normal cells, and thus increase the plant height. The comparison shows that primed seeds to create favorable conditions by increasing plant height, relative water content, proline content and soluble sugar content reduction was significantly increased plant biomass and grain yield. Vetch dry matter accumulation yield, plant height and yield of forage plants can be attributed to a high levelof dry matter accumulation in different parts of the plant. Concentrations of salicylic acid and gibberellin treatments, have increasd plant height and ultimately produced a better performance. The use of these plant hormones can increase the rate of photosynthesis and the transfer of materials to the seeds. Reserves accumulated in the stem before pollination can also in some plants be used for grain filling, in addition to the present assimilate used, resulting in an increase in harvest index contributed. Foreign Salicylic acid can regulate antioxidant enzyme activity and increase plant resistance to abiotic stresses. Salicylic acid reduction due to ethylene through the effect on the mechanisms of enzymatic and non-enzymatic of plant improves oxidative stress protection. Gibberellic acid increased amylase activity in the cotyledons of mung bean seedlings. Gibberellin are for the elongation of cells in the embryo and endosperm during seed germination.

Conclusion
The results showed that in the treatment of 50 ppm of salicylic acid the highest dry matter yield was obtained by 1837 kg per hectare and 49% increase compared to the control, 513.3 kg per hectare grain yield by 36.19% increase compared to control, and harvest index also amounted to 27.11% compared to the control was 30/76%. In the treatment of 100 ppm gibberellin best dry matter yield by 1469.36 kg per hectare and 20.9% increase compared with the control, grain yield by 508.08 kg per hectare yield and 31.09% increase compared to control, and harvest index by 25.66 percent and 20.45% compared to control increased, respectively. In general it can be stated that salicylic acid and gibberellin have positive and significant impact on traits, and vetch plants grow better with treatment of 50 ppm of salicylic acid and 100 ppm of gibberellin.

Key words: Dry matter yield, Fabaceae, Germination percentage, Growth regulators, Harvest index, Plant hormones

Keywords

Dry matter yield; Fabaceae; Germination percentage; Growth regulators; Harvest index; Plant hormones

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