Allellopathic effects of Mesembryanthemum forsskalii Hochst. ex Boiss. on seed germination and seedling growth of Malva parviflora L. and Plantago ovata Forssk
Salama, Hediat M. H. . 2016
The present study focused on the allelopathic
effects of the aqueous and methanol extracts of
Mesembryanthemum forsskalii Hochst. ex Boiss.
on germination and seedling growth of Malva
parviflora and Plantago ovata. M. forsskaliii was
collected from Al-Jouf area, Saudia Arabia. The
dried shoot system of M. fosskalii was used to
prepare water and methanol extracts with different
concentrations (25, 50, 75 and 100%) and distilled
water as the control. The results showed that the
aqueous and methanol extracts of M. forsskalii
contained phenolic compounds and flavonoids
that might be embroiled as allelochemical agents.
Petri-dish trial showed that the two extracts at
all concentrations reduced total germination
percentage. Pot experiment indicated variations
in seedlings germination and growth between
M. parviflora and P. ovata in response to aqueous
and methanol extracts of M. forsskalii. On growth
stage the shoot and root lengths were decreased
probably due to the allelopathic effects of
M. forsskalii. The fresh and dry weights of shoot
were inhibited with increase in concentration of
aqueous and methanol extracts. In M. parviflora
and P. ovata the leaf area was decreased under all
concentrations. The chlorophyll a, b and carotenoids
(pigments) were decreased in M. parviflora and
P. ovata for all concentrations of extracts, but
methanol extract increased chl. a only in M. parviflora
compared to control. Flavonoids, saponins,
tannins, carbohydrates, glycosides and phenolic are
the allelochemical compounds released from the
M. forsskalii into aqueous and methanol extracts
which inhibited germination and growth of the
studied plants
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