Study of Genetic Effects on Seed Germination and Growth of Popular Seedlings

الملخص

This study investigates the allelopathic effects of aqueous leaf extracts from Acacia saligna, Casuarina cunninghamiana, and Eucalyptus camaldulensis on seed germination and seedling growth of their own species and two field crops: Zea mays (maize) and Oryza sativa (rice, Vietnamese line Sakha 104). Fresh and dry leaf aqueous extracts of R. dracers were prepared and used at various concentrations; 1%, 3% and 5% on seeds and seedlings in a controlled environment. Germination percentages and average shoot height and dry weight were measured and the data was statistically analyzed using split split plot design. The conclusion of the study showed that there were the high significant differences in germination and growth of various species using different extracts and concentration. Acacia saligna had the highest germination percentage (89.00 %) under fresh extracts at 1%, whereas Eucalyptus camaldulensis had the poor germination (<6 %) in all treatments. Among the field crops, the test crops responded affected to the dry leaf extracts maximum on germination percent of Zea mays and Oryza sativa with 78.22 and 65.77% respectively at 5% concentration. All extract concentrations used in the study reduced germination and growth of beans, and dry extracts were more effective in inhibiting bean germination than the fresh extracts. These findings shed light on the multi-faceted nature of the allelopathic effects between tree species and field crops and suggest that serious attention must be given to the management of allelopathic tree species in multipurpose plantations and intercropping systems. The work brings knowledge to ecological and agricultural interaction of allelopathy and can be useful for further study of optimal choice of species and impact on crop yield.