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RHIZOSPHERE BACTERIA AND THEIR Studies were carried out on the characterization
EFFECT ON GERMINATION OF RICE SEEDS and glyceride compositions of safflower
AND GROWTH OF SEEDLINGS. J. Bio-Sci., (Carthamus tinctorius) seed oil.It was observed
2007, 15, 77-82. that safflower seed grown under the soil and
climatic condition of Bangladesh contains 32 % of
Rhizosphere bacteria were isolated from root zones golden yellow coloured oil.The physicochemical
from rice fields. These were cultured in laboratory characteristics of the oil were studied by the con-
conditions and investigated the effects on ventional methods and the fatty acid composition
germination and growth of rice seedlings. They by GLC.From the results it is revealed that the oil
inhabit around the roots and live on root exude and can be used suitably in paint, varnishes and soap
benefit the plants by altering the solubility and manufacturing industries on account of its high
availability of mineral nutrients and protecting the linoleic acid content (75 %), iodine value (148)
roots from invasion of pathogens by creating an and saponification value (190).The oil was
antibiotic barrier around the root. It has been found fractionated into mono-, di-, and triglycerides by
that rhizosphere bacteria have no effect on silicic acid column chromatography.The
germination of rice seeds. Both the rhizosphere triglycerides were accounted for over 90 % of total
bacteria and the Agrobacterium have been found to weight of the oil. Fraction of lipids into three major
produce better growth of rice seedlings in pot lipid groups, neutral lipids, glycolipids and
cultures but later is less effective than the former. phospholipids was carried out by silicic acids
Rhizosphere bacteria are mixtures of many e g. column chromatography. The neutral lipids were
Actimomyces, Proteobacteria, Pseudomonas etc. averaged to 94 % of the total weight of the lipid
but Agrobacterium sp is single. applied. The percentage composition of individual
fatty acids were found to be linoleic acid (75.0),
122 PAUL, N.K. & BEGUM, N. (Dept. of oleic (12.6), palmitic acid (8.4), stearic acid (2.6)
Botany, Rajshahi University, Rajshahi). Influence and myristic acid (1.4).
of Root and Leaf Extracts of Argemone mexicana
on Germination and Seedling Growth of 124 RAHMAN, M.A. (Dept. of Agronomy,
Blackgram, Rapeseed and Wheat. Bang. J. Sci., Hajee Mohammad Danesh Science and
Ind. Res., 2007, 42 (2), 229-234. Technology University, Dinajpur). Effect of
Sulphur, Bradyrhizobium Inoculation, Initial
Allelopathic effect of different concentrations (0, Moisture Content of Seed and Storage Container
20, 40 and 60%) of root and leaf extracts of on the Germination Percentage of Groundnut Seed.
obnoxious weed Argemone mexicana on Bang. J. Sci. Ind. Res., 2007, 42 (2), 175-186.
germination and seedling growth of blackgram,
rapeseed and wheat varieties was studied. The study was aimed at determining the effect of
Percentage of germination and lengths of main root sulphur and Bradyrhizobium fertilized seed at
and shoot and seedling dry weight were highly different initial moisture content of seed and
significantly decreased with the increase of both storage container, to improving the germination
root and leaf extracts. In some cases, root extract percentage of groundnut seed. The germination test
was more inhibitory, but in others leaf extract was was carried out after storing the seed for five
more inhibitory. Among the varieties, Dhali of months. Results revealed that seeds obtained from
rapeseed and Akbar of wheat were most sensitive 60kg S/ha. stored in polythene bags retained the
to the aqueous extract of Argemone mexicana. germination percentage up to the standard level of
ISTA for 5 months efficiently. Least initial
123 RAFIQUZZAMAN, M. ; HOSSAIN, M. moisture content of seed (7.25 %) produced from
A. & HASAN, A.J.M.M (BCSIR Laboratories, the above doses of fertilizer elements also played a
Rajshahi). Studies on the Characterization and vital role in keeping the quality of stored seed.
Glyceride Composition of Safflower (Carthamus Results in the respect of storage performance in
tinctorius) Seed Oil. Bang. J. Sci. Ind. Res., 2006, terms of percentage of germination indicated that
41 (3 & 4), 235-238. groundnut seed obtained from sulphur and
Bradyrhizobium fertilizer elements during
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