The effect of density-dependent and density-independent factors in regulating the resource allocation , reproductive effort, and fecundity of atriplex triangularis populations were studid in field ...

Germination and seedling growth of prosopis juliflora was tested using various dilutions of amended sea water. The plant exhibited high salt tolerance at germination as well as at the growth phase .fi...

Sixteen plant communities recognized on the basis of index of similarity were grouped into 4 steppe types (artemisis maritime steppe, haloxylon griffithii steppe, alhagi maurorum steppe salsola hbar...

The analysis of achyranthes aspera dominated stands revealed that 45 species were associated with a mean number of 9.54 +- 1.02 species per stand though most of them were of minor importance. A.aspe...

Ten species of the sub genus coprosma (rubiaceae ) have been studied palynologically, TEM was more informative where different components of the exine provide taxonomic characters. The useful char...

Three basic pollen types, namely auricular , farinose and veris are found in primula . the species occurring in Pakistan are catergorised and the relationship between various species discussed. SEM ...

Chromosome number and meiotic pairing of three varieties of themeda anathera (Nees) hack, from Pakistan show diploids , aneuploides and eupolyploids all with...

Anthers of nicotiana tabacum cv. Virginica were cultured and the development of pollen grains studied. A large proportion of pollen grains degenerated in culture , the surviving ones belonging to m...

In studies on callus induction from seeds and seedling explants 32% seeds produced calli when BA (10-7 M) + 2,4-D (10-5 M)+ NAA (10-6 M ) were used. Mode of regeneration was embryogenesis in a com...

Young leaves of rauwolfia serpentine baill, inoculated on MS medium supplemented with NAA @ 1 mg/l with 10mg/l K and and 10% CM under 24 h light induced callus while 2,4-D induced callus under 1...

The magnitude of genetic variability , heritability and genetic advance among 36 varieties of soybean was studied . considerable genetic variability was observed for pods per plant, plant height and g...

Influence of 5000 and 10,000 hux intensities on photosynthesis , leaf area, dry matter and nodulation in nodulated and non-nodulated soybean (glysine max CV. Covernia-5) was investigated. High ligh...

Nitrogen fixing root nodules of coriaria nepalensis consumed hydrogen pn incubation with a gas mixture containing hydrogen , indicating an uptake hydrogenase activity . the H2 uptake by the excised ...

In aganosoma caryophyllata , colleters are present on the basal adaxial side of the petiole, bract and calyx . these finger shaped structures are clearly divisible into head and stalk . the colleter...

The marine benthic brown alga iyengaria stellate (borg) borgesen , collected from the coast of Karachi was studied for its sterol composition . analysis of ethyl acetate fraction of the methanolic e...

The ethyl acetate fraction of methanolic extracts of acanthophora dendroides Harvey and halymenia porphyroides borgesen yielded a mixture of fatty acids and cholesterol as a major compound, while 7-o...

Brassica juncea seeds soaked in 1000 ppm chlormequat solution for 6 h increased seed germination, number of branches , flowers , pods and yield , while pod length , pod diameter , seed per pod, seed...

In-vitro digestibility of mung ( vigna radiate) , mash ( vigna mungo ), masur ( lens culinaris ) and gram (cicer arietinum ) in raw and boiled states was undertaken , mung had highest crude protei...

Association of mycorrhiza with jute plants ( corchorus sp ) is elucidated .a species of glomus is considered forming mycorrhizal association with jute plants . the effect of mycorrhiza on the growth ...