Foliar Spray of Growth Regulators Modifies Phenology and Physiology of Withania somnifera (L.) Dunal

Author: Pratibha Goud, Gyanendra Tiwari, Prabha Tigga, Abhilasha Tiwari, Subrata Sharma, Anubha Upadhyay, R. Shiv Rama Krishnan, Preeti Sagar Nayak and R.K. Samaiya

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Abstract

Research experiment was conducted to investigate the effect of growth regulators spray on phenology and physiology of Withania somnifera during Rabi season 2022-2023 at Herbal Garden, Department of Plant Physiology, JNKVV Jabalpur (M.P.) India. Pot experiment comprises of eight treatments viz., water spray (T1), NAA@50ppm (T2), NAA@100ppm (T3), BA@50ppm (T4), BA@100ppm (T5), IBA@50ppm (T6), IBA@100ppm (T7), IBA@150ppm (T8) conducted in Completely Randomized Block Design replicated thrice. The result revealed the delayed occurrence of primary branches initiation with maximum delayed primary branching was found with the individual spray of IBA@50/100/150ppm and NAA@100ppm where as maximum delay in secondary branch initiation was noted with the spray of BA@50/100ppm and NAA@50ppm individually. The maximum days to floral initiation, first fruit maturity and 50% fruit maturity was found when no growth regulator sprayed. Fruit initiation was delayed to its maximum due to water, NAA@50ppm and BA@100ppm individually, while maximum delay in physiological maturity founded under the spray of BA@50ppm which is statistically similar with NAA@100ppm. The maximum RWC, WSD, MSI and Proline was achieved under the spray of NAA@50ppm, BA@50/100ppm and IBA@150ppm respectively. No definite sequence or pattern of CCI was recognized due to spraying of growth regulators

Keywords

Withania somnifera, growth regulators, NAA, BA, IBA, RWC, MSI, WSD, Proline, phenology

Conclusion

Hence it is concluded that spray of IBA in lower dose (50 mgL-1) delayed branching in Withania somnifera while higher dose (150 mgL-1) promoted early flowering and fruiting. In addition, spray of NAA@50 mg L-1 found best for maximum Relative Water Content. Spray of BA@100/50 mg L-1 were equally effective in achieving maximum Water Saturation Deficit. The maximum Membrane Stability Index was achieved with BA@100 mg L-1. Spray with IBA@150 mg L-1 recorded the highest Proline content

References

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How to cite this article

Pratibha Goud, Gyanendra Tiwari, Prabha Tigga, Abhilasha Tiwari, Subrata Sharma, Anubha Upadhyay, R. Shiv Rama Krishnan, Preeti Sagar Nayak and R.K. Samaiya (2024). Foliar Spray of Growth Regulators Modifies Phenology and Physiology of Withania somnifera (L.) Dunal. Biological Forum – An International Journal, 16(8): 125-128.