24-05-12
ABSTRACT:
M. AJMAL KHAN AND N. BEENA

GERMINATION STUDIES ON ATROPA ACUMINATA ROYLE EX LINDLEY
ABSTRACT:
Seeds of Atropa acuminata Royle ex Lidley, which were mechanically scarified and then treated with IAA gave 78% germination while seeds subjected to acid scarification and soaking in water gave 50% germination. GA

COMPARATIVE EFFECT OF NACI AND SEAWATER ON SEED GERMINATION OF LIMONIUM STOCKSII
ABSTRACT:
Limonium stocksii (Boiss.) O. Kuntze, a secreting perennial in the family Plumbaginaceae is widely distributed in the coastal marshes of Karachi, Pakistan. We are reporting here the effect of seawater and NaCl on the seed germination of L. stocksii both under a 12 h photoperiod and in complete darkness. Seed germination decreased with increase in salinity and few seeds germinated above 30 dS m(-1) in both NaCl solution and seawater. Absence of light had little effect under non-saline condition however, addition of salinity synergistically inhibited seed germination. Seawater inhibited seed germination of L. stocksii more than NaCl solutions under both light and dark conditions. All un-germinated seeds when transferred to distilled water after 20 days of salinity treatments readily germinated.

EFFECTS OF ZINC, NITROGEN AND TEMPERATURES ON SEEDLING GROWTH OF RICE
ABSTRACT:
A water culture experiment was conducted to examine the effects of Zn (ZnSO4, 7H

COMPARATIVE PERFORMANCE OF TWO METHODS FOR PROLINE ESTIMATION IN WHEAT
ABSTRACT:
Wheat leaf extraction, with 3% sulfosalicylic acid and 0.5% toluene was compared for proline determination. It was observed that toluene extracted 50-60% more proline than sulfosalicylic acid. Accumulation of proline in the leaf, under salinity stress, is further substantiated.

ANTIBACTERIAL POTENTIALS OF SOME CONSTITUENTS OF LAVANDULA STOECHAS L.
ABSTRACT:
Antibacterial potential of 10 monoterpenes, isolated from the essential oil of Lavandula stoechas L., and identified as camphor, borneol, caryophyllene, cineole, alpha-terpineol, fenchol, linalyl acetate, citronellol, camphene and P.-pinene was investigated against seven species of gram (+) bacteria viz., Bacillus megaterium, B. subtilis, B. thuringiensis, Sarcina lutea, Staphylococcus albus, S. aureus and S. epidermidis and 12 species of gram (-) bacteria viz., Escherichia coli, Klebsiella pneumoniae, Micrococcus luteus, M. roseus, Proteus vulgaris, Pseudomonas aeruginosa, Salmonella typhi, S. paratyphi, Shigella boydii, S. dysenteriae, S. flexneri and S. sonnei. Kanamycin was used as standard antibacterial compound. Camphor, borneol and cineole appeared to be the most potent antibacterial agents than other active compounds.

CONTRIBUTION TO ASTERACEAE FROM PAKISTAN AND ADJOINING AREAS-SOME NEW TAXA, COMBINATION AND NEW RECORDS
ABSTRACT:
Anaphalis chitralensis M. Qaiser & Rubina Abid and a variety i.e., Phagnalon schweinfurthii Schultz Bip. ex Schweinf. var. lamondae M. Qaiser & H.W.,Lack of the tribe Gnaphalieae and Pluchea arguta Boiss. subsp. glabra M. Qaiser of the tribe Plucheeae are described here as new to science. A combination in the tribe Anthemideae viz., Tanacetum eriobasis (Rech.f.) Kovalvsk subsp. tricholepis (Podlech) Qaiser is validated whereas, two taxa viz., Pentanema nematolepis Rech. f. and Pulicaria glutinosa (Boiss.) Jaub. & Spach of the tribe Inuleae are proved as new records from Pakistan.

POLLEN FLORA OF PAKISTAN -XVIII. AMARANTHACEAE
ABSTRACT:
Pollen morphology of 18 species belonging to 10 genera of the family Amaranthaceae has been investigated using light microscope and scanning electron microscope. It is stenopalynous in nature. Pollen grains mostly oblate-spheroidal, pantoporate, +/- circular, pores small or large, nonoperculate, or operculate, with rounded or star-like operculum, pore plate +/- scabrate - spinulose. Tectum sparsely to densely scabrate, often spinulose. On the basis of exine ornamentation 2 distinct pollen types viz., Amaranthus viridus type and Gomphrena celosioides - type are recognized.

A NEW SPECIES OF SCORZONERA L. (ASTERACEAE) FROM ANATOLIA, TURKEY
ABSTRACT:
Scorzonera adilii A. Duran sp. nov., is described from the Aydos Mountain (C5: Konya) in Turkey. It is related to S. rigida Aucher, from which it mainly differs in its lanceolate leaves and features of pappus.

STUDIES ON THE FLORA OF IRAN, NEW SPECIES AND NEW RECORDS
ABSTRACT:
Cerasus yazdiana, Convolvulus kurdistanicus and Dionysia khatamii are described as new species, Chesneya rytidosperma is reported as a new record for Iran and more information about the distribution of Frangula alnus Mill., in Iran are added.

OCCURRENCE OF PERSISTENT INFECTION THREADS IN THE ROOT NODULES OF DALBERGIA SISSOO ROXB.
ABSTRACT:
Root nodules of Dalbergia sissoo Roxb., were globose and present in the axils of lateral roots. Histological studies showed that rhizobia entered the root via root hairs and formed infection threads some of which were branched. The nodule cortex showed a sclereid layer at its periphery. The bacteroid region showed infected and non infected (interstitial) cells intermingled with each other. Persistent infection threads were observed which are being reported for the first time.

MITOTIC APPARATUS MOVEMENT AND CELL WALL PATTERNING IN ROOT APICAL MERISTEM OF ALLIUM CEPA
ABSTRACT:
The positioning of cell wall in a dividing cell is very crucial for organ development. It is determined by the cortical information of the cytoskeleton in G2 phase called Preprophase Band (PPB). The cell plate is also perpendicular to the Mitotic Apparatus (MA). Thus coordination of PPB, the MA orientation and the position of the aforesaid future cell wall is of critical importance in these cells. Cells with oblique MAs and their position in the apical meristem was studied by cytological techniques. The role of microfilaments in cell plate formation is described by application of Cytochalasin B. The oblique MAs have a developmental role in the formation of long cortex cells and the central cylinder. Actin filaments are responsible for organization of the cell wall position.

CULTIVATION OF STERNBERGIA FISCHERIANA (HERBERT) RUPR., AND A STUDY ON ITS MORPHOLOGICAL CHARACTERISTICS
ABSTRACT:
Bulbs of Sternbergia fischeriana collected from the village Taslica of the province of Marmaris in the first weeks of March, April and May 1998 were planted after separating them into 4 groups based on size with three replications each at the experimental farms of the Department of Field Crops, Faculty of the Agriculture, University of Ankara, Turkey during 1998-2000. Percentage of emerging plants, percentage of flowering plants, percentage of plants setting fruits, number of leaves per plant and the plant height showed a range of 60.00- 96.67 %, 0-13.69 %, 0-7.50 %

EVALUATION OF LOCAL AND EXOTIC PEA PISUM SATIVUM GERMPLASM FOR VEGETABLE AND DRY GRAIN TRAITS
ABSTRACT:
Sixty-eight pea genotypes both local and exotic were evaluated for 17 quantitative traits related to earliness, green pod yield, shelled fresh yield and grain yield. Results based on basic statistics, frequency distribution and correlation. studies gave hope for the improvement of pea varieties for green pod yield and shelled fresh yield, Three genotypes (10303

EVALUATION OF CHICKPEA GERMPLASM AGAINST ASCOCHYTA BLIGHT
ABSTRACT:
Of the 269 chickpea breeding lines evaluated against gram blight caused by Ascochyta rabiei under glass house conditions, only 7 lines viz., F16-90C, NCS950088, NCS950038, CMC228S, SEL96TH 11488, FLIP96-75C and 86135 were found resistant while 46 lines were tolerant to Ascochyta blight. This study provides some additional source of resistant materials against Ascochyta blight which can be used in hybridization program for the development of chickpea resistant cultivars for commercial cultivation in Pakistan.

GENETIC VARIATION AMONG FUSARIUM OXYSPORUM F.SP. CICERIS ISOLATES IN PAKISTAN AS DETERMINED BY BIOLOGICAL PATHOTYPING AND VEGETATIVE COMPATIBILITY
ABSTRACT:
Fusarium oxysporum f.sp. ciceris isolates 2005

A TAXONOMIC STUDY OF THE FAMILY DICTYOSTELIACEAE BASED ON RIBOSOMAL DNA SEQUENCES
ABSTRACT:
The sequences of the 5.8S nuclear ribosomal DNA and the internal transcribed spacer (ITS1 and ITS2) regions from 12 species of Dictyosteliaceae were analyzed. These regions were extremely divergent in what we consider to be a single family. In the ITS I and ITS2 regions there were high nucleotide length variations between two genera, Dictyostelium and Polysphondylium. The results of sequence alignments revealed that the sequences of the 5.8S rDNA had sufficient divergences to be used for a taxonomic study of these taxa and the ITS regions were useful to discriminate between closely related species.

FURTHER STUDIES ON SEIMATOSPORIOPSIS SUTTON, GHAFFAR & ABBAS
ABSTRACT:
Detailed studies on additional hosts of Seimatosporiopsis viz., Salvadora persica, Acacia Senegal, Prosopis juliflora, Citrullus colocynthes, Calotropis procera and Capparis decidua belonging to different angiospermic families and collected from different claimatic regions of Pakistan showed significant variation from the original description of the genus, therefore generic description has been amended.