OCCURRENCE OF A NEW SPECIES OF CHARA (CHAROPHYTA) NEAR BALOCHISTAN COAST OF PAKISTAN
ABSTRACT:
A new taxon, Chara krausei Shameel, has been described from a seawater lagoon near the coast of Gwadar, Balochistan (Pakistan) and compared with the ecorticated taxa like Chara braunii Gmelin. C corallina f. corallina Wood, C socotrensis f. pashanii Dixit and Lamprothamnium succinctum (A. Braun) Wood. It has been distinguished due to its small height, large number of branchlets in a whorl. small crown at branchlet apex, swelling Of penultimate and shortening of lower most segments of branchlets, Sturdy stipulodes and bracts, absence of gametangia at shoot nodes and bearing antheridia below oogonia.

SEASONAL VARIATIONS IN BIOMASS, ABUNDANCE AND SPECIES DIVERSITY OF PHYTOPLANKTON IN THE ISKENDERUN BAY (NORTHEASTERN MEDITERRANEAN)
ABSTRACT:
Phytoplankton biomass. abundance, diversity and their relations with physico-chemical properties of water were determined in the northwestern part of the iskenderun Bay, northeastern Mediterranean coast of Turkey, Nine stations were sampled monthly from July 2000 to July 2001. Phytoplankton biomass, in terms of chlorophyll a values ranged from 0.05 to 2,7 mug.L-1 during the study period. Phytoplankton abundance was lowest in summer (2.64x10

A NEW SPECIES OF SEPTORIA
ABSTRACT:
Septoria oleandriicola sp.nov., is described and illustrated from leaves of Nerium oleander. collected in Turkey.

STAURONEMATOPSIS ABBAS, SUTTON AND GHAFFAR GEN.NOV., AN ADDITION TO COELOMYCETES
ABSTRACT:
Study of isotype of Pseudorobillarda sojae Uecker & Kulik (IMI 1298796) revealed that it does not belong to Pseudorobillarda and differs from other Coelomycetous genera, therefore a new generic name Stauronematopsis Abbas, Sutton & Ghaffar and a new combination S sojae (Uecker & Kulik) Abbas, Sutton & Ghaffar is proposed.

CITRIC ACID FERMENTATION BY A UV-TREATED MUTANT OF ASPERGILLUS NIGER
ABSTRACT:
The production of citric acid of by Aspergillus niger was investigated with wild-type (GCB-1) and UV-treated mutant (UV-6) using 7.5, 9.0 and 10.5 L medium in stirred fermentor. Yield of citric acid was found to be seven-fold higher as compared to the parent in 9.0 L medium and the corresponding increase was two-fold in the 7.5 L medium. With 10.5 L I fermentation, the yield was low with both the parent and the mutant strain, though the mutant gave higher yield compared to the parent.

FREE PROLINE CONTENT IN ASTRAGALUS SPECIES
ABSTRACT:
Free proline content was determined in roots and leaflets of 23 species of Astragalus collected from different regions of Iran. The content of free proline in roots and leaflets varied from 0.09-1.23 and 0.04-0.95 % dry weight, respectively, In a number of species proline content was higher in leaflets than in roots, whereas in some other species proline content in roots was higher than in leaflets. The accumulation of free proline in different organs of different species can be attributed to the osmotic conditions of the plants which could represent differences in their mode of adjustment to the environmental condition. The habitat of the species can also affect the organ of proline accumulation. In the present paper, the proline content in roots and leaflets of various species of Astragalus is reported for the first time.

GROWTH RESPONSE OF WHEAT CULTIVARS TO NAPHTHALENEACETIC ACID (NAA) AND ETHREL
ABSTRACT:
Study was conducted at experimental farm using two growth regulators i.e. naphthaleneacetic acid (NAA) and ethrel at concentrations of 0

EFFECTS OF PLANT AND WEED RESIDUES ON THE GROWTH OF RICE
ABSTRACT:
An experiment was carried out in plastic pots to examine the effect of plant residues of mesquite,, lambsquarters, mundi flower and purple nutsedge on the growth of rice cv. Shadab. Incorporation of plant and weed residues increased plant height, number of tillers, dry matter wt., weight of earhead and straw and grain yields of rice as compared to control. Maximum yield in growth parameters were recorded when powdered leaf of lambsquarters was used.

GENETIC VARIABILITY, CORRELATION AND PATH ANALYSIS OF YIELD AND ITS COMPONENTS IN WINTER RAPESEED (BRASSICA NAPUS L.)
ABSTRACT:
Twenty-five winter type rapeseed genotypes selected from diverse germplasm were studied to estimate heritable variation, correlation among yield and yield components and effective selection criteria to improve yield. The genotypes differed significantly for all the traits studied. Genotypic and phenotypic variances were high for pods per plant and plant height, whereas the highest genotypic and phenotypic coefficients of variability were found for seed yield and pods per plant, respectively. Broad sense heritability ranged from 0,146 (seeds per pod) to 0.488 (seed yield). Moderate heritability of seed yield and seed weight coupled with high genetic advance indicated that improvement could be done through mass selection for these traits. Seed yield was positively correlated with all the yield components. Plant height has also shown positive correlation with branches per plant, pods per plant and seeds per pod. Path coefficient analysis indicated that pods per plant, seeds per pod and seed weight have considerable direct positive effect on seed yield. Pods per plant has also shown positive indirect effect for all the yield components.

STABILITY ANALYSIS OF SEED YIELD IN WINTER TYPE RAPESEED (BRASSICA NAPUS) VARIETIES
ABSTRACT:
Twelve winter type rapeseed varieties of Brassica napus were evaluated at 10 different locations in mild cold and cold regions of Iran for stability parameters of grain yield. Genotype x Environment interaction was significant indicating the influence of environment on grain yield. The linear component has major contribution towards differences in stability of genotypes. A top yielding genotype SLM-046 was found a stable cultivar for grain yield. Genotypes Regent x Cobra and A.W. are suitable for favourable environments, whereas PF-7045/91 and Eureka are suitable for poor environment. Variety Cobra is unpredictable across the environments.

POLLEN FLORA OF PAKISTAN -XXXV. CORNACEAE
ABSTRACT:
Pollen morphology of the family Comaceae has been examined from Pakistan by light and scanning electron microscope. Pollen grains are generally tricolporate, triangular, prolate-spheroidal with densely fossulate to foveolate tectum. 161-171

SEED MORPHOLOGY OF CARYOPHYLLACEAE SPECIES FROM TURKEY (NORTH ANATOLIA)
ABSTRACT:
Scanning electron microscopy (SEM) techniques were used to investigate the macro and micromorphology of seed of 17 species (12 genera) of Caryophyllaceae, All material Studied was collected from North Anatolia (Square A3-A8 of Flora of Turkey). Three of the species are endemic for Turkey. Some important character states identified were: Seed type: Reniform, ovoid, reniform to orbicular, orbicular, peltate, scaled-winged, winged, cylinderical, ovoid to reniform; seed surface type: Flat-concave, flat, convex, wringed crugosus aculeate, concavo-convex, rounded; tubercle shape: Tall/short conical, obtuse, rounded, flat and aculeate-verrucate, digitate; surface granulation: Medium, fine and coarse or not; suture outline: Digitate/serrate/ stellate/sharply-sinuous, fine digitate and sharply serrate; hylar zone: Recessed, prominent, facial and flat.

TOP SENESCENCE IN SOME MEMBERS OF AMARYLLIDACEAE FAMILY IN CENTRAL AND EAST BLACK SEA REGIONS OF TURKEY
ABSTRACT:
In this Study nitrogen (N), phosphorus (P) and potassium (K) analysis were carried out during vegetative and generative growth periods hi some members of Amaryllidaceae family collected from the Central and East Black Sea Regions. oil the north of Turkey. The above ground parts of plant N ere found to have higher macroelement concentrations as compared to below ground parts during vegetative growth period. However, below ground parts have higher macroelement concentrations during generative growth phase due to "top senescence". In addition to this there were significant and mostly negative correlations between plant and soil macroelement concentrations.

SEQUENCE DIVERGENCE OF RBCL GENE AND HYLOGENETIC RELATIONSHIPS IN LILIALES
ABSTRACT:
DNA sequences of the chloroplast gene encoding the large submit of ribulose-1. 5-bisphosphate-carboxylase (rbcL) of 20 taxa representing four different orders of Liliflorae was compared, Two different methods (maximum parsimony using PAUP and neighbour joining (NJ) were employed for phylogenetic reconstruction. Similar tree topologies were obtained by both methods. Both trees indicate that Liliales sensu Dahlgren et at., (1985) is not a monophyletic group. Phylogenetic analysis revealed two clades within order Liliales. Clade "A" includes Tricyrtidaceae and Liliaceae sensu stricto and corresponds to Liliales sensu stricto. Clade "B" includes Colchicaceae and Uvulariaceae. Monophyly of the taxa within groups A and B is supported in 92 and 100% respectively, of the bootstrap replications for parsimony method and 97 and 100% for neighbour joining method. The Iridaceae form a clade with Asparagales that is supported in 100% of the bootstrap replications for both parsimony and NJ methods. Smilax, which Dahlgren et at., placed in Dioscoreales, is clustered with those of clade "A" of Liliales.