Enhanced effect of Plant Growth Regulators in inducing and Retaining Flowering in Sapota (Manilkara zapota L.) cv. Kalipatti

Author: Jannila Praveena, S.N. Dash, Kabita Sethi, R.K. Panda and S.C. Swain

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Abstract

A field experiment was conducted at Horticultural Research Station, Odisha University of Agriculture and Technology, Bhubaneswar during 2020-2022. The experiment was carried out with ten treatments involving different concentrations of plant growth regulators viz., Brassinolide (0.5 ppm and 1.5 ppm), Salicylic acid (150 ppm and 300 ppm), NAA (150 ppm), and their combinations were embedded in Randomized Block Design with three replications. The major problem confronting sapota production is flower and fruit drop at different stages of production, which causes a drastic loss to the sapota farmers. The major aim of the research was to control the flower drop by use of new generation plant growth regulators and their combinations. The growth regulators were applied as foliar spray during three phenological stages (vegetative, flowering and pea stage of fruiting). The results obtained from this experiment showed that combined effect of Brassinolide and NAA (1-Naphthalene Acetic Acid) has significant effect on flowering parameters. Application of Brassinolide 1.5 ppm along with NAA 150 ppm showed the maximum value for, duration of flowering (34.57 days), number of flowers per shoot(37.86), flower retention percentage(40.08 %), minimum value for flower drop %(59.92 %), days to initiation of flowering (31.46 days) over control.

Keywords

Sapota, Plant growth regulators, Brassinolide, Salicylic acid, NAA.

Conclusion

CONCLUSIONS The result of present study conclusively showed that effect of plant growth regulators had significant effect on different flowering parameters of sapota cv. Kalipatti. Foliar application Brassinolide 1.5 ppm along with NAA 150 ppm had pronounced effect to induce a greater number of flowers, more flower retention and in controlling the flower drop percentage over other treatment tested in sapota cv. kalipatti. This might be due to application of brassinolide modulate the metabolic pathway by modifying signaling pathway analysis and involvement of auxin helps in better translocation of food materials.

References

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How to cite this article

Jannila Praveena, S.N. Dash, Kabita Sethi, R.K. Panda and S.C. Swain (2022). Enhanced effect of Plant Growth Regulators in inducing and Retaining Flowering in Sapota (Manilkara zapota L.) cv. Kalipatti. Biological Forum – An International Journal, 14(4): 1376-1380.