Abstract
AbstractIn nature, allelopathic substances are likely to influence the germination of seeds. Callistemon viminalis, Tephrosia vogelii, Senna spectabilis, Cupressus lusitanica, and Polyscias fulva are found around some tomato culture fields in Cameroon. These plants may produce allelochemicals that can influence tomato seed germination and seedling characteristics. Methanol extracts and their fractions were prepared from leaves of these plants and tested on seed germination rate, shoot diameter, root and stem lengths, and vigor index of seedlings. The tested substances did not significantly (p > 0.05) affect the seed germination rate. Aqueous extracts of T. vogelii, C. lusitanica, and C. viminalis exerted the highest inhibition on seed germination while methanol extract, hexane, and ethyl acetate fractions of all the plants induced significant increases in diameters of seedlings. Aqueous extracts were effective on the stem length. All treatments generally reduced the root length. Methanol extracts induced ...
Highlights
Tomato (Solanum lycopersicum L.) is one of the most produced and consumed fruits in world, and Cameroon in particular
Plant material Plant material consisted of leaves from the following species: C. viminalis, T. vogelii, S. spectabilis, C. lusitanica, collected in January 2014 at the campus of the University of Dschang, as well as P. fulva collected in May 2014 in Bafou, all situated in the western administrative Region of Cameroon
The positive control accelerated seed germination, with a germination time of 2 days, instead of 3 days observed in the negative control or extract/fraction-treated groups
Summary
Tomato (Solanum lycopersicum L.) is one of the most produced and consumed fruits in world, and Cameroon in particular. It is a rich source of vitamins A and C, folic acid, α-lipoic acid, lycopene, choline, β-carotene, and lutein (Afzal et al, 2009). It is known that the production yield of tomato and other plants depends on many factors including soil nature, pest management, the variety used, seed germination, and seedling problems. It can be affected by neighboring plants through allelopathic effects
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