Author(s):

Veeranan Uthirapandi, Selvam Suriya, Ponnerulan Boomibalagan, Saminathan Eswaran, Subramanian Sivasangari Ramya, Narayanan Vijayanand and Durairaj Kathiresan

Abstract: A pot experiment was conducted to identify the potential of Sargassum wightii, Turbinaria ornata and Caulerpa racemosa on growth and biochemical parameters of Ocimum sanctum. Seaweed liquid extracts were given to the tested plant in form of foliar spray. After 60 days, growth parameters such as shoot length, root length, total plant height, leaf area, number of the leaves, fresh and dried weight and biochemical parameters such as starch, glucose, protein, chlorophyll content were observed in the treated plants. Foliar application of individual seaweed treatments (T1, T2, T3) enhanced the overall growth and physiology of Ocimum sanctum. But, there was an appreciable increase in growth and biochemical parameters in the treated plants which received mixture of seaweeds (T4) when compared to individual treatment and control. This might may be due to synergistic and cumulative effect of qualitative and quantitative active ingredients such as micro and macroelements, vitamins and phytohormones present in the seaweed liquid extracts. Thus, seaweed liquid extract could serve as an promising effective organic biostimulantto replace the synthetic fertilizers for sustainable agriculture.

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