Abstract:
Germination and seedling growth of rice (Oryza sativa) seeds soaked in distilled water and water extracts of some weeds were investigated in two laboratory experiments. The root, shoot, leaf, seed and whole plants of Trianthema portulacastrum L., Dactyloctenium aegyptium L. and Eleusine indica L. were soaked in distilled water (1:20 w/v) individually for 24 hours at room temperature to obtain extracts. The germinated rice seeds were counted and removed from petri dishes every day in first experiment. Whereas, in second experiment, rice seeds were sown in sand culture to assess the seedling growth. Significantly the maximum mean germination time and time taken to 50 % germination was observed where rice seeds were soaked in water extracts of roots of Trianthema portulacastrum L. The rice seeds soaked in leaf extracts of T. portulacastrum L. showed the maximum inhibitory effects on root and shoot length of rice whereas, root and shoot dry weight per seedling as a result of interactive effect of weeds and water extracts was significantly minimum when rice seeds were soaked in root extract of Dactyloctenium aegyptium L. Pre sowing soaking in water extract of seed of T. portulacastrum increased shoot length of rice over control. Pre sowing soaking by leaf extract of T. portulacastrum proved to be the most injurious to germination and seedling growth of rice.
Page(s):
7-12
DOI:
DOI not available
Published:
Journal: Pakistan Journal of Life and Social Sciences, Volume: 9, Issue: 1, Year: 2011