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Studies On Plant Growth Regulators And Enzymes Production By Some Bacteria
(
Qatar University
, 1994 , Article)
Twenty four bacterial strains of thallobacteria belonging to genus Streptomyces were tested for their potentialities to produce plant growth regulators and some hydrolases in shake cultures. Seven strains namely; Streptomyces ...
Effect Of "Ethrel" On Colour Development And Juice Quality Of Sweet Oranges And Grapefruits
(
Qatar University
, 1994 , Article)
"Ethrel" was sprayed at 0,120, 420 and 480 ppm on sweet orange and grapefruit trees at fruit maturity stage to improve colouring and juice quality. Changes in fruit colour were observed in both varieties but the results ...
Contribution of the Fungal Flora and Mycotoxins of Some Canned Tomato Paste Samples
(
Qatar University
, 1994 , Article)
Twenty-two species belonging to seven genera were isolated and identified from 21 tomato paste samples on glucose-Czapek's (5 genera and 14 species) and 10% NaCl-glucose-Czapek's (6 genera and 17 species) agar media, at ...
Nature Of The Aflatoxin B, - Induced Inhibition Of Photosynthesis In Chlorella Fusca (Chlorococcales, Chlorophyta)
(
Qatar University
, 1994 , Article)
Treatment with Aflatoxin E^ (AFBi) resulted in inhibition of photosynthetic oxygen evolution in Chlorella fusca Shih.et Krauss. Treatments also induced a marked reduction of both chlorophyll and carotenoid contents. ...
Effect of gamma radiation on the morphology and Thermophysical properties of the pollen wall of Phoenix dactylifera L.
(
Qatar University
, 1994 , Article)
Pollen grains of Phoenix dactylifera were exposed to different doses of gamma radiation (250,500,1000 rad and 1 M rad). To access the effect of radiation on the external morphology of the pollen grains, they were examined ...
Response of Nile Phytoplankton to Algicide (CuSO4, 5H2O) In Multispecies Chemostat Experiments
(
Qatar University
, 1994 , Article)
The addition of CuSO4 . 5H2O (algicide) to cultures of phytoplankton populations from the river Nile, grown under steady-state conditions using chemostat, resulted in remarkable alterations in species composition, total ...
Edaphic Gradients And Species Attributes Influencing Plant Distribution In Littoral Salt Marshes Of Qatar
(
Qatar University
, 1994 , Article)
Edaphic gradients of moisture and salinity are critical environmental stresses that seriously influence littoral salt marsh flora, and determine the zonation of coastal vegetation. Shoreline communities subjected to severe ...
Condition and trend of a depression-type habitat In rainfed desert rangelands of Qatar In response to fertilizer application
(
Qatar University
, 1994 , Article)
Characteristics of a rainfed depression-type habitat in desert ranges, and its response to fertilizer application were studied. A single fertilizer application at a rate of 75 Kg ha1 prior to the rainy season improved range ...
Response of Date Palm Pollen Tube Growth to Storage Period and Conditions
(
Qatar University
, 1994 , Article)
The growth rate of pollen tube of date palm (Pheonix dactylifera L.) pollen grains stored either freeze-dried or unfreeze-dried at 25, 4 and - 8°C was measured after 3,7 and 12 months of storage. The growth of pollen tube ...
Cytology and palynology of common monocots in mariut, egypt i. Common species of the families alliceae and liliaceae
(
Qatar University
, 1994 , Article)
The present sludy includes cytological and palynological investigations of five species belonging to the families Alliaceae and Liliaceae, as an impetus for more in-depth floristic, taxonomic and phytogeographical ...