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Now showing items 11-20 of 28
Plant growth, metabolism and adaptation in relation to stress conditions. Vi. Differential effects of sodium sulphate on growth and element content of phaseolus vulgaris and zea mays
(
Qatar University
, 1989 , Article)
Seeds of Phaseolus and Zea were germinated and then cultured either in Hoagland nutrient solution (1/4-strength) by itself or in combination with different concentrations of Na^SC^. Salinization induced, in general, varied ...
Mycoflora of cotton flowers and fungi associated with boll rot in egyptian cotton. I-saprophytic fungi
(
Qatar University
, 1987 , Article)
Isolation of fungi was made for nine weeks post flower opening for two consecutive years from young floral segments and capsule components, on glocuse and cellulose agar media.
The capsule components possesed fewer fungi ...
Mitotic Disturbances Induced By The Drug "Novalgin" In Allium Cepa Root Tips
(
Qatar University
, 1984 , Article)
Growing root tips of Allium cepa are treated with seven concentrations of Novalgin ranging from 2.81 x 10 4 M to 1.5 x 10 4 M for 4, 8, 24,48 and 72 hours.
The frequency of mitotic phases in the treated roots varies ...
Fluometuron Induced Growth, Chemical And Photosynthetic Changes In Chlorella Vulgaris
(
Qatar University
, 1988 , Article)
Presence of fluometuron at different concentrations in the culture medium of Chlorella vulgaris induced pronounced inhibition in the growth rate and dry weight of the alga throughout the experimental period. Furthermore, ...
Some Enzymatic Activities Of Fungi Isolated From Cotton Seeds And Cotton Seed Products
(
Qatar University
, 1984 , Article)
Five hundred different cultures which belong to fifteen genera and forty-one species, isolated from cotton seeds and cotton seed products were studied for proteolytic, amylolytic and lipolytic activities. About 80% of the ...
Water Conditions And Proline Content In Shade And Sun Plants
(
Qatar University
, 1984 , Article)
Different parameters of the water conditions (Water content, water saturation deficit, osmotic pressure of the cell sap and partial osmotic pressure due to sugars), chlorophyll and proline contents were investigated in sun ...
أشكال الارض وحياة النبات في قطر
(
Qatar University
, 1981 , Article)
Apical dominance in vicia faba l.
(
Qatar University
, 1983 , Article)
A side-effect of plant surgery was an interference with apical dominance. From the results of three experiments involving plant surgery, decapitation and the usage of "C-IAA, it appeared that the movement of the apically ...
Studies on growth and chemical composition of tobacco varieties. IV - comparative effects of various combinations of fertilizers on economic potentialities of tobacco plants
(
Qatar University
, 1987 , Article)
In two experiments, tobacco plants were treated with various combinations of ammonium nitrate (23% N) and compound C (3.5% N, 23% P and 16% K). At all levels used in experiment I, stem length and number of leaves were ...
أسماء النباتات اللاتينية ذوات الأصول العربية
(
Qatar University
, 1986 , Article)