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Effect of priming with neem seed extract on seeds of four traditional rice varieties of Sri Lanka; Kaluheenati, Kurulurthuda, Madathawalu and Maa-wee

Authors:

M.O. Galappaththi ,

University of Peradeniya, LK
About M.O.
Department of Botany
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K.M.G.G. Jayasuriya,

University of Peradeniya, LK
About K.M.G.G.
Department of Botany
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N.S. Gama- Arachchige

University of Peradeniya, LK
About N.S.
Department of Botany
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Abstract

With the concern for environmentally friendly agriculture, demand for traditional rice varieties in Sri Lanka has been increased. Farmers claim that the seed germination in traditional rice varieties in Sri Lanka is remarkably low. Considering the reported benefits of neem in enhancing the germination, priming of rice seeds with distilled water and neem seed extracts (100, 50 and 25% strength) for 0, 24, 48, and 72 hours was used to enhance the performances in seed germination of four selected traditional rice varieties. Primed seeds were dried under ambient conditions until initial weight was achieved. Seed germination was tested at ambient laboratory conditions (~27 °C). Seed vigour was evaluated by measuring the root, and shoot lengths and seedling emergence in glasshouse conditions. Four replicates of 100 seeds were used in each treatment. Arcsine transformed data were analysed using one-way ANOVA. Germination percentages of un-primed seeds of Kaluheenati, Kuruluthuda, Maa-wee and Madathawalu were 62, 32, 24, and 20%, respectively, while seedling emergence of the same were 65, 10, 12 and 40 %, respectively. Half strength neem priming (50%) for 24 hours and 24 hours pre-soaking significantly improved seed germination (83%) and seedling emergence (83%) of Kaluheenati, while quarter strength neem priming for 72 hours and 24 hours presoaking improved germination (64%) and seedling emergence (25%) of Kuruluthuda. Quarter strength neem priming for 48 hours, and 48 hours pre-soaking was effective in improving the germination (49%) and seedling emergence (30%) of Maawee, while priming with 100% neem extract for 72 hours and 48 hours pre-soaking improved the germination (55%) and seedling emergence (53%) of Madathawalu. Root and shoot lengths were higher in seedlings of neem primed seeds. Thus, priming with neem seed extracts can be recommended to improve the performance in seed germination of studied rice varieties.

How to Cite: Galappaththi, M.O., Jayasuriya, K.M.G.G. and Gama- Arachchige, N.S., 2021. Effect of priming with neem seed extract on seeds of four traditional rice varieties of Sri Lanka; Kaluheenati, Kurulurthuda, Madathawalu and Maa-wee. Journal of the National Science Foundation of Sri Lanka, 49(4), pp.525–538. DOI: http://doi.org/10.4038/jnsfsr.v49i4.10336
Published on 31 Dec 2021.
Peer Reviewed

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