Combining ability estimates of some tester lines used onto cytoplasmic male sterile cotton
ABSTRACT:
Three cytoplasmic male sterile lines of cotton and six hirsutum ono-restore pollinators were used as tester lines on to CMS parents to study the general and specific combining ability parameters for yield of seed cotton, seed index , lint index, ginning outumn percentage and staple length . of tht tester lines used , K- 68/9 was observed to be the best combiner for yield of seedcotton and therefore was considered suitable for converting it into restore parent to be utilized in hybrid cotton development programme. Per se performance of hybrids for yield of seedcotton was correlated with specific combining ability ffects but the correlation did not hold good with respect to seed index , lint index, g.o.t.% and staple length. Generally the GCA of a tester line was not correlated with the SCA of a hybrid for all the characters. GCA effects were more pronounced with respect to yield , as compared to SCA effects , and therefore selection has been advocated on the basis of GCA’s of the tester lines.

Changes in nucleic acid content , peroxidase content and its isozymic forms in in vitro propagated of chick
ABSTRACT:
Culture were developed to facilitate callus inducation by seeds and from explants of shoot tip, root tip, node and leaf of chick pea, cicer arietinum L. cv. CM 72. DNA RNA content and peroxidase activity of calli raised from seeds showed

The role of medium composition and light intensity on in vitro root formation of strawberry
ABSTRACT:
In vitro propagated strawberry shoots were subjected to in vitro rooting under different BA levels, types of media, incubation temperatures and light intensities . root formation started within 10 days of culture undr high light intensity of 13.5W.m-2. In vitro rooting of strawberry shoot tips occurred redily on inorganic salts of murashige and skoog medium . the extent of root formation was directly related to sucrose and light intensity. No root formation occurred in the dark , under low light and in sucrose free medium. BA upto 1 um did not inhibit root formation . addition of

Regulations of pollen germination and tube growth of different parts of catharanthus roseus L.
ABSTRACT:
Alcoholic extract of vegetative and reproductive parts of catharanthus roseus was tested for substances responsible for germination and growth of pollen tube of the same plant. Several promoters and inhibitors of pollen germination and tube growth were detected in extracts of anthers , stigma, style and ovary. In the ovary extract no pollen tube growth promoter was found. The major differences in the quality of the growth regulators dependent on the type of tissue tested. Extracts of leaf , young fruit, mature fruits and seeds contained compounds which inhibited the pollen germination and the tube growth of C. roseus . the Rf value of the inhibitors differed according to the tissue used . no promoter was found in any of these extracts.

Acid phosphate and adenosine triphosphatase from plant lattices
ABSTRACT:
Fifteen plant lattices of the families apocynaceae , asclepiadaceae and sapotaceae have been investigated for the presence of acid phosphatase and adenosine triphospahatse enzymes. The lattices studied possess both acid phosphatase and adenosine triphosphatase enzymes. One of the richest sources of enzymes was from the

Studies on photosynthetic rates and species composition of an epilithic periphyton community in a stream at fresno, california
ABSTRACT:
an epilithic periphyton community howed significant seasonal changes I species composition , abundance and photosynthetic rates in a slow-flowing , mammade stream. Blue green algae were dominant during summer, diatoms were dominant during spring and winter, and green algae dominated the community during fal. The highest photosynthetic rates were found in winter with 240C as the optimum temperatures for production in all seasons.

Effect of brown rust infection on indole- 3-acetic acid and the activity of enzyme IAA-oxidase in different cultivars of wheat.
ABSTRACT:
Effect of brown rust infection on endogenous level of IAA and the activity of enzyme IAA-oxidase in three different cultivars of wheat was investigated . infected stem tissues of highly susceptible cultivars Pak-70 and Chenab- 70 showed significant increase in IAA level as comparatively resistant cv., ZA-77. Diseased leaves of cv., ZA-77 and Pak-70 showed no significant change in IAA contents, whereas it increased significantly in cv., Chenab-70. Pronounced decline In IAA oxidase activity was observed in leaves and stem tissues of cv., Chenab-70, while in cv., Pak-70 it is increased after sporulation and then declined. Rust infection does not seem to have any considerable effect on

Effect of N-sources on growth of wheat
ABSTRACT:
Effect of urea , (NH4)NO3 and NH4Cl on the growth of wheat cv., Lu-26-S in sandy clay loam was studied . N fertilizers significantly increased palnt height , number of tillers , straw weight and grain yield with marked effects where urea was used. Maximum uptake of N,P and K by wheat plant was recorded under yrea fertilization , indicating urea as a better N- source for growth of wheat.

Field trial of c A. juss . under highly saline water irrigation at arid sandy coastal region of pakistan
ABSTRACT:
In a field trial at sandy acid coastal land of bhawani (gaddani coast , Baluchistan ) epilithic periphyton community . A. juss , plants irrigated with highly saline (EC:10.0-15.3 dS.m-10 and sodic (irriation quality : C4S2; SAR:c. 28 ) underground water exhibited relative inhibition of growth in height during winter months. Such inhibition was more conspicuous in stem dimeter of the treated plants which was overcome after rainfall (100mm) in april with no difference in height or stem diameter after one year of post- transplantation groth. Saline water

Effect of sea water salinity on nodulation and nitrogen fixation in prosopis juliflora (Swartz) DC.
ABSTRACT:
Fifty six day old prosopis juliflorasedlings were subjeacted to 40, 50, 60, 70 and 80% sea water treatment for one month. After 86 days the morphology of nodules , root-shoot ratio and total nitrogen content in root and shoot were analysed. Nodules showed morphological alterations in size and shape . root-shoot ratio was lowest in the control and showed a gradual increase with increasing sea water concentrations. The amount of nitrogen in the stem and leaves showed a gradual decrease due to disturbance in the translocation od divalent cations to the aerial parts, while roots registered a gradual increase with increasing sea water concentrations due to accumulation of assimilated nitrogen n the rocks.

Influence of Nalco on some biochemical aspects
ABSTRACT:
Effect of Nalco on two enzymes viz., amylase and protease and the metabolic sequence induced by them in two

Hitochemistry of cambium in holoptelea intergrifolia (ROXB.) planch. And mangifera indica L: its seasonal changes
ABSTRACT:
Seasonal histochemical localization of starch , lipids , proteins, tannins and crystals in fusiform and ray initials and their derivatives of holoptelea integrifolia and mangifera indica was carried out. The seasonal changes were correlated with the cambial activity of the trees.

Structure, compositon and above ground standing phytomass of some grazable grass- dominated communities of
ABSTRACT:
Herbaceous communities that emerge on the Pakistan sea coast during monsoon have high percentage of therophytes followed by chamaephytes . besides , dominant componentof grasses , legumes were invariably present in all the sites . the number of species in a stand varied with the nature of the site and its salinity

Temporal changes in vegetation of miranjani top galis , hazara , NWFP, Pakistan
ABSTRACT:
The vegetation of miranjani top has considerably changed in twelve years (1974-86) . more changes have occurred I the vegetation on east , west, and south- facing aspects ; whereas least change was noticed on north-facing slopes. The vegetation was dominated by koeleria gracilis , sibbaldia cunea:a , potentilla gerardiana, nepeta erecta and duchesnea

Astudy of natural regeneration of juniperus excels M.bieb . in Baluchistan , pakistan
ABSTRACT:
Regenerating seedlings from 60 mature stands on juniper track in Baluchistan ranged from zero to 219 ha-1 with a mean of 52 ha-1. Seedling density and basal area (p<.001) and tree basal area and seedling density (p<.05) were significantly correlated indicating that seedlings are shade loving. Highest average seedling density and basal area were recorded from west facting slope. Size frequency distribution of seedling showed a wave of recruitment in addition to past and future trends of the seedling populations suggesting that juniper forests are not deteriorating.

Phytosociology of woodland communities of hazarganji national park, quetta
ABSTRACT:
On the basis of bray and Curtis 1957 index of similarity , two plant communities were recognized . both the stand density as wel as stand cover per hectare values were higher in pistacia- cymbopogon- chrysopogon community than in pistacia-fraxinus-cymbopogon community. The latter community was homogenous while species diversity was moderate , community maturity index was low. Grasses particularly cymbopogon commutatus and chrysopogon aucheri

Controlling elements inducing mutational changes at the pal locus in anttrrhinum majus
ABSTRACT:
In anttrrhinum majus the pal-rec-low-o is a repressed state of the pallida-recurrens allele. In heterozygous condition, especially with pal-tub- pal—tub tester, its mutuation frequency increases from few tiny spots to very clear sectors of mutability on a recessive colourless background. This particular evocation of the pal-rec-low-o allele is considered to be dependent on the presence of a regulatory element Pr. In the absence of such a regulatory element, the pal-rec- low-o exhibits stable expression owing to the effect of a repressor Rp residing ai or near the locus. However, pal-tub- regulatory element could be inactive , when inactive , can be made transactive by introducing a fresh regulator which may segregate at meiosis.

Studies in the pollen morphology of arnebia species (boraginaceae ) from pakistan
ABSTRACT:
A palynological study of 9 species of the genus arnebia from Pakistan was carried out . the pollen were characterized by having two endoapertures per ectoaperture and a well developed costae with rectangular to constructed rectangular equatorial outline and echinate tectum. Using principle component analysis (PCA) and cluster analysis of various pollen characters a correlation of the style length and polen size was worked out.

A cladistics analysis of calandrinia (portulacaceae)
ABSTRACT:
The cladistics relationship among 34 species of the genus calandrinia H.B. et K. (portulacaceae), endemic to austrailia were analysed for 22 binary attributes , by using “OHYSIS” computer program. The criteria used to assign evolutionary polarity of attribute state is discussed indetail. In all the phenograms four main groups come out fairly clearly. The major diference in the trees produced by PHYSIS are the changes in the position of a few taxa, within the major group. The present paper provides data on variation and correlation in seed and pollen characters , and also syntheized detailed morphological relationships. The species having questionable position in some groups are discussed in the light of their unique characters.

Systematic structure of dampiera R. BR.
ABSTRACT:
An agglomerative hierarchial cluster analysis of dampiera R.Br. (goodeniaceae) species was under taken by using

Observations on ecodemes in girardinia diversifolia (link) friis , (urticaceae) in Nepal.
ABSTRACT:
Two ecodemes of girardinia diversifolia (link) friis are recognized on the bases of certain morphological features, seed and seedling characteristics and amino acid contents.

Reaction of wheat varieties to foot rot and root rot disease of wheat in Pakistan.
ABSTRACT:

Nepeta adenophyta hedge (labiatae), a new species from Pakistan.
ABSTRACT:
A new species of nepeta viz, N,adenophyta hedge is described from Pakistan. During the course of preparation of an account of the family labiatae for flora of Pakistan, the author came across a new Nepeta species.