Effects of Seed Treatments Using Extracts of Oxalis barrelieri L. and Cymbopogon citratus Stapf, Coupled with NaCl Sorting on Seed Health, Germination, Emergence and Seedlings Vigor, of Rice (Oryzae sativa L.) Seeds

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Effects of Seed Treatments Using Extracts of Oxalis barrelieri L. and Cymbopogon citratus Stapf, Coupled with NaCl Sorting on Seed Health, Germination, Emergence and Seedlings Vigor, of Rice (Oryzae sativa L.) Seeds

March 13, 2021 Agricultural Sciences 0

The antifungal activity of extracts of Oxalis barrelieri and Cymbopogon citratus against Bipolaris oryzae and Fusarium moniliforme was tested, and seed treatment with NaCl was used to improve seed germination and seedling vigour of treated rice seeds. The inhibitory effect of plant extracts against B. oryzae and F. moniliforme was based on the type of extract and concentration. The ethanolic extract of C. citratus at 10000 ppm had the strongest inhibitory effect, inhibiting F. moniliforme and B. oryzae development by 58.51 percent and 55.9 percent, respectively. Rice seeds that had been sorted in a 20 percent NaCl solution had a higher mass (quantify), a germination percentage of 13 percent higher than seeds sorted in water and 20 percent higher than seeds that were not sorted. The weight of rice seeds was found to have a moderately positive and important linear relationship (Rho (78) = 0.427 **, p0.01) with germination. Rice seed germination was stimulated similarly by ethanol extracts of O. barrelieri and C. citratus in green house trials, with 15- 22 percent from the top of paper method and 11-16 percent from the sand method. Rice seed treatments at 1% concentration had the best germination/emergence and decreased B. oryzae and F. moniliforme seed infestation by 25.25 percent and 9.83 percent, respectively. Plants are used to treat stressed seeds. When compared to untreated stressed seed, extracts showed a less pronounced (5%) decrease in germination (26 percent ). Only the associations between germination and F. moniliforme infestation (r (54) = -0.441**, p 0.01) and emergence and F. moniliforme infestation (r (54) = -0.426**, p 0.01) were moderately and statistically important. Rice seeds treated with 20 percent NaCl and/or 1 percent ethanol extracts of Oxalis barrelieri and Cymbopogon citratus showed promise as a green alternative to synthetic fungicides for controlling rice seed-borne infestation, improving seedling vigour, and increasing seed germination and emergence for successful seedling field establishment.

Author (s) Details

Nguefack Julienne
Department of Biochemistry, Faculty of Science, University of Yaoundé I, P.O.Box 812, Yaoundé, Cameroon.

Fouelefack François Romain
Department of Biochemistry, Faculty of Science, University of Yaoundé I, P.O.Box 812, Yaoundé, Cameroon and Department of Biological Sciences, Faculty of Science, University of Maroua, P.O.Box 814, Maroua, Cameroon.

Dongmo Lekagne Joseph Blaise
Department of Biochemistry, Faculty of Science, University of Yaoundé I, P.O.Box 812, Yaoundé, Cameroon.

Azah Udom Rene
Department of Biochemistry, Faculty of Science, University of Yaoundé I, P.O.Box 812, Yaoundé, Cameroon.

Dongmo Nanfack Albert
Department of Biochemistry, Faculty of Science, University of Yaoundé I, P.O.Box 812, Yaoundé, Cameroon.

Djoufack Metis Molière
Department of Biochemistry, Faculty of Science, University of Yaoundé I, P.O.Box 812, Yaoundé, Cameroon.

A. P. Obouayeba
UFR Agroforetry, Laboratory of Agrovalorisation, Departement of Biochemistry-Microbiology, Jean Lorougnon Guédé University of Daloa, BP 150 Daloa, Côte d’Ivoire.

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