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extracts of L. perpusila (6.57 ppt) > Chloroform Seeds of mungbean, cv. Barimung-2 were
extracts of L. perpusila (7.28 ppt) > Petroleum ether germinated in different concentrations of lead
extracts of U. minor (12.24 ppt) > Petroleum ether (Pb), viz. 0.01, 0.03, 0.05, 0.1, 0.5, 1 & 3 mM to
extracts of A. pinnata (25.52 ppt) > Chloroform evaluate germination behavior and growth of
extracts of A. pinnata (25.98 ppt) > Methanol seedlings at early stage. Control seeds were
extracts of L. Perpusila (28.55 ppt) > Methanol treated with modified Hoagland solution. The
extracts of C. fragilis (30. 48 ppt) > Chloroform germination of the seeds was monitored daily for
extracts of U. minor (31.94 ppl) > Methanol extracts four days.The seedling growth, water content as
of S. polyrhiza (51.27 ppt) >Methanol extracts of U. indicated by the ratio of fresh and dry weight of
minor (52.91 ppt) > Methanol extracts of A. pinnata seedlings, chlorophyll contents were measured on
(66.52 ppt).
the 7th day of the experiment.Different
concentrations of Pb resulted in marked reduction
581.14 : BOTANY : GERMINATION in the percentage of seed germination, length and
weight of root and shoot as well as survivality of
108 AKHTER, N.; BEGUM, M.F.; mungbean seedlings. Contrary, fresh and dry
ALAM, S. & ALAM, M.S. (Dept. of Botany, weights of root and shoot per unit length were
Rajshahi University, Rajshahi). INHIBITORY increased.The induction and growth of root
EFFECT OF DIFFERENT PLANT EXTRACTS, systems were seriously inhibited by Pb as
COW DUNG AND COW URINE ON CONIDIAL compared to shoot growth.The water content of
GERMINATION OF BIPOLARIS SOROKINIANA. both root and shoot was conspicuously reduced
Bang. J. Bio-Sci., 2006, 14 (1), 87-92. by Pb. Total chlorophyll contents in leaves of the
treated seedlings were increased with the
Inhibition of conidial germination of Bipolaris increasing levels of Pb up to 0.1 mM of Pb, and
sorokiniana was tested using eight ethanolic plant then decreased. Chlorophyll b was more affected
extracts, ten aqueous plant extracts in than chlorophyll a by Pb. The results indicated
combination with cow dung and five aqueous that the tolerance level of Pb in relation to growth
plant extracts in combination with cow urine. of mungbean seedlings is lower than 0.01 mM.
Hundred percent of conidial germination was
inhibited with the application of ethanolic 110 SULTANA, M.S.; HOSSAIN, F.;
extracts of Adhatoda vasica (leaf) and Zingiber HOSSAIN, M.T. (Dept.of Botany,
officinale (rhizome) at 2.5% concentration. After Jahangirnagir University, Savar, Dhaka) &
the treatment with Vinca rosea, Piper betle and KARIM, M. A. (Dept. of Agronomy,
Azadirachta indica extracts in combination with Bangabandhu Sheikh Mujibur Rahman
cow dung suspension showed 100% inhibition of Agricaltural University, Gazipur). Effect of NaCl
conidial germination; where the lowest was noted on germination and seedling growth of mungbean
in case of Rauwolfea serpentina (30%) extract at varieties. Bang. J. Life Sci., 2007, 9 (2), 1-8.
same concentration. At 2.5% concentration of
Calotropis procera extracts in combination with Salinity tolerance at germination and early
cow urine, 91% inhibition of conidial seedling stage is the most important factor for
germination was observed. In most cases, crop establishment under saline conditions. In
Ocimum sanctum extract exhibited less inhibitory order to analyze salt tolerance behavior of
effect against B. sorokiniana. mungbean at early stages of growth, seeds of six
recommended varieties, viz. BARImung-2,
109 HOSSAIN, M.T.; HOSSAIN, F. BARImung-4, BARImung-5, BARImung-6,
(Dept. of Botany, Jahangirnagar University, BINAmung-5 and BUmung-2, were placed for
Savar, Dhaka) & KARIM, M.A. (Dept. of germination at different levels of NaCl solutions.
Agronomy Bangabandhu Sheikh Mujibur The six NaCI levels were as 25, 50, 100, 150, 200
Rahman Agricultural University, Gazipur). Effect mM and distilled water was used as the control.
of lead on germination, growth and chlorophyll The experiment was continued for 10 days.
contents in mungbean at early seedling stage. Germination percentage, germination index,
Bang. J. Life-Sci., 2007, 19 (1), 41-48.
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