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Year 1999 , Volume  31, Issue 2
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1
POLLEN FLORA OF PAKISTAN -XXXI. BETULACEAE
ANJUM PERVEEN AND M. QAISER

POLLEN FLORA OF PAKISTAN -XXXI. BETULACEAE
ABSTRACT:
Pollen morphology of the family Betulaceae from Pakistan has been examined by light and scanning electron microscope. Pollen grains are generally 3-5-porate, oblate or sub-oblate with scabrate tectum.

243-246 Download
2
BREAKING OF SEED DORMANCY IN DUCROSIA ANETHIFOLIA (DC.) BOIFF.
M.N. AL-YEMENI AND A.Y. BASAHY

BREAKING OF SEED DORMANCY IN DUCROSIA ANETHIFOLIA (DC.) BOIFF.
ABSTRACT:
Scarification of seeds of Ducrosia anethifolia (DC.) Boiff., in concentrated sulphuric acid was found most effective than boiling water or ethanol treatment to break seed dormancy. Germination percentage at optimum temperature of 30 °C for seed germination decreased at 1 M NaCI salinity level from 65 to 8 %, this decrease in germination was also observed in the other temperature and salinity treatments giving a lower percentage of germination compared to the optimum. No germination was recorded at 1 M NaCI salinity level at lowest 10 °C and highest 40 °C temperature and also at 0.5 M and 0.1 M NaCl levels. Significant effect of temperature, salinity and their interaction was found on seed germination.

247-252 Download
3
SEED SIZE VARIATION AND ITS EFFECTS ON GERMINATION, GROWTH AND SEEDLING SURVIVAL IN ACACIA NILOTICA SUBSP. INDICA (BENTH.) BRENAN
S. SHAHID SHAUKAT, ZAMIN S. SIDDIQUI AND SEEMI AZIZ

SEED SIZE VARIATION AND ITS EFFECTS ON GERMINATION, GROWTH AND SEEDLING SURVIVAL IN ACACIA NILOTICA SUBSP. INDICA (BENTH.) BRENAN
ABSTRACT:
The importance of seed size in germination, emergence, growth and survivorship was assessed. Seed weight of Acacia nilotica subsp. indica varied from 0.1104 to 0.2490 g per seed with a coefficient of variation of 19.56 %. Larger seeds showed greater rate and final germination percentage compared to medium and small size seeds. Survivorship curves for all three seed size categories approached Deevy type II curves but the curves for medium and small-sized seeds were slightly steeper. Final surviving percentage of seedlings after 120 days was higher for large seeds compared to that of medium and small seeds. Seedling fresh and dry weights after 120 days of growth were greater for the ones developed from large seeds. It is concluded that variation in seed size produces variation in seedling fitness.

253-263 Download
4
EFFECT OF LIGHT AND TWO ISOMERS OF NITROPHENYL INDOLE-2-CARBOXYLIC ACID ON GERMINATION OF CENCHRUS CILIARIS SEEDS
M. SHAFIQ CHAUDHRY*, MISBAHUL AIN KHAN** AND FAIZ-UL HASSAN NASIM

EFFECT OF LIGHT AND TWO ISOMERS OF NITROPHENYL INDOLE-2-CARBOXYLIC ACID ON GERMINATION OF CENCHRUS CILIARIS SEEDS
ABSTRACT:
Effect of light and different concentrations of m- and p- isomers of 1-nitrophenyl indole-2-carboxylic acid (NPICA) has been investigated on the germination of Cenchrus ciliaris seeds. Light not only delayed germination of the seeds but also reduced the germination by >62 %. Presence of 15 to 45 ppm of either 1m- or 1-p-NPICA in the germination medium showed a negative effect on seed germination whereas, presence of 30 ppm of either of the two isomers improved germination, albeit slightly and only in the presence of light.

265-270 Download
5
HEAT STRESS TOLERANCE STUDIES IN CALLUS CULTURES OF GOSSYPIUM HIRSUTUML. CV. ACALA SJ2.
LAL HUSSAIN AKHTAR, JOHN GORHAM*, MASOOD AKHTAR, MUHAMMAD SAFDAR AND MUHAMMAD ASLAM

HEAT STRESS TOLERANCE STUDIES IN CALLUS CULTURES OF GOSSYPIUM HIRSUTUML. CV. ACALA SJ2.
ABSTRACT:
Heat stress tolerance was studied in cotton (Gossypium hirsutum L.). Callus cultures of two cotton cultivars viz., Coker 312 (cotyledonary-derived) and Acala SJ2 (leaf and petiole-derived) showed significant stimulation in growth at stress temperature of 44 °C for 2 hours after 2 days of pre-incubation at 28 °C followed by 26 days of incubation at 28 °C. Reduction in callus growth at 47 and 50 °C was higher in Acala SJ2 compared to Coker 312. Petiole-derived callus exhibited more heat tolerance than leaf-derived callus. At 50 °C callus tissue turned brown. The relative significance of increases in growth rate at 44 °C and drastic reduction in growth rate at temperatures above 44 °C is discussed in the light of heat induced production of proline, glycinebetaine, heat-shock proteins and killing of some viruses which have been reported to protect plant tissues from damage caused by heat stress.

271-281 Download
6
TISSUE CULTURE OF MICROSPERMA LENTIL (LENS CULINARIS MEDIK) CV. MASOOR-85
NAFEES ALTAF, JAVED IQBAL* AND MUHAMMAD SALIH AHMAD

TISSUE CULTURE OF MICROSPERMA LENTIL (LENS CULINARIS MEDIK) CV. MASOOR-85
ABSTRACT:
Various combinations of plant hormones were tested for canogenesis in different explants of microsperma lentil cultivar Masoor-85. Callogenesis was observed under dark conditions. Calli could regenerate bud primordia and a few buds developed into shoots with leaves when transferred under light conditions. Elongated shoots were cut from the base and adventitious rooting was induced to develop these into pod bearing plants in the field.

283-292 Download
7
SOMATIC EMBRYOGENESIS IN PROTOPLAST CULTURES DERIVED FROM MESOPHYLL AND EMBRYOGENIC CALLUS OF SUGARCANE (SACCHARUM SPP. HYBRID CV. COL-54)
FAHEEM AFTAB AND JAVED IQBAL

SOMATIC EMBRYOGENESIS IN PROTOPLAST CULTURES DERIVED FROM MESOPHYLL AND EMBRYOGENIC CALLUS OF SUGARCANE (SACCHARUM SPP. HYBRID CV. COL-54)
ABSTRACT:
Protoplasts were isolated both from leaf mesophyll tissue as well as from compact globular white embryogenic callus of mesophyll origin in sugarcane (Saccharum spp. hybrid cv. COL 54). Totipotent protoplasts with an yield of 1x106 and1x105 ml-1 with 72 and 68% viability were obtained respectively from mesophyll and embryogenic callus cultures. A heterogeneous population of protoplasts (30-60µm Ø) was obtained from both sources. Protoplasts isolated from compact globular white embryogenic callus were less heterogeneous (30-40µm Ø)and cytoplasmically dense. Of the several protoplast culture methods tried, the best results were achieved using protoplast embedding in agarose-solidified medium. Medium P9 proved good for somatic embryogenesis from mesophyll-derived protoplasts in which further differentiation of somatic embryos was not possible. Protocallus formation from protoplasts isolated from embryogenic callus cultures was achieved in dark using agarose-solidified KPR medium in 16 weeks. Shoot formation was achieved from such protocalluses by further transferring to MS basal medium containing 9µmol (2 mg-1) 2,4D for 8 weeks under 16h photoperiod condition. Transfer of such proliferated callus masses to MS basal medium containing 9.29µmol (2 mg-1) Kinetin + 5.37µmol (1.0 mg-1) NAA and 200 mg-1 activated charcoal for 10 weeks resulted in shoot formation.

293-300 Download
8
CHROMOSOME STUDIES OF SOME SPECIES OF CENTAUREA SECTION ACROCENTRON (ASTERACEAE) FROM IRAN
SEYYED MAHMOOD GHAFFARI

CHROMOSOME STUDIES OF SOME SPECIES OF CENTAUREA SECTION ACROCENTRON (ASTERACEAE) FROM IRAN
ABSTRACT:
Original chromosome observations of seven species of the genus Centaurea (Sect. Acrocentron) are reported. Of these, counts for 3 taxa viz. C. irritance 'Wagenitz., C. persica Boiss, and C. sosnovskyi Grossh., are new 10 science. Meiotic behaviour of chromosomes and chiasmata frequency are noted here for the first time Basic chromosome numbers for section are x = 10 and x = 11.

301-305 Download
9
C-BANDED CHROMOSOMES OF FOUR VICIA L., SPECIES
SEMA HAYIRLIOGLU-AYAZ, YRJÖ VIINIKKA* OSMAN BEYAZOGLU

C-BANDED CHROMOSOMES OF FOUR VICIA L., SPECIES
ABSTRACT:
The distribution of heterochromatin on the chromosomes of Vicia hybrida L. (2n= 12), V. hirsuta (L.) S. F. Gray (2n= 14). V. tetrasperma (L.) Schreb, Spic. (2n = 14) and V. sativa L. subsp. nigra (L.) Ehrh._n= 12) have been established with the aid of the C-banding technique.

307-313 Download
10
KARYOTYPE ANALYSIS OF SOME LILIUM L. (LILIACEAE) SPECIES FROM TURKEY
HÜSEYIN INCEER, QSMAN BEYAZOGLU AND SEMA HAYIRLIOGLU-AYAZ

KARYOTYPE ANALYSIS OF SOME LILIUM L. (LILIACEAE) SPECIES FROM TURKEY
ABSTRACT:
Karyotype analysis of four Lilium L (Liliaceae) species viz., L. candidum L. L. martagon L. L.ciliatum P.H. Davis and L. carniolicum subsp. ponticum. (C.Koch) Davis & Henderson distributed in North East Anatolia, Turkey, was carried out. The chromosome number was found to be 2n = 24 in all taxa. The karyotype analysis showed that the karyotypes of these taxa consist of median, submedian, subterminal and terminal chromosomes.

315-321 Download
11
ESTIMATION OF GENETIC EFFECTS AND HERITABILITY FOR EARLY MATURITY AND AGRONOMIC TRAITS IN PEANUT (ARACHIS HYPOGAEA L.,)
NAAZAR ALl, J.C. WYNNE* AND J.P. MURPHY*

ESTIMATION OF GENETIC EFFECTS AND HERITABILITY FOR EARLY MATURITY AND AGRONOMIC TRAITS IN PEANUT (ARACHIS HYPOGAEA L.,)
ABSTRACT:
Studies were carried out to detennine the inheritance and heritability of early maturity and yield traits where 2 high yielding virginia types (No. 334 and 'NC 9') were crossed with an early maturing spanish type (lCGSE-4) of peanut (Arachis hypogaea L.). A field trial with eight generations per cross (P1, P2, Fl, F2, BC11, BC12, BC11S, BC12S) was conducted at two locations in North Carolina during 1989. Analysis of generation means indicated that additive genetic effects were important for yield per plant, maturity index and seed weight in both crosses. Dominance effects were also important for yield per plant, maturity index, seed number and shelling percentage in cross 1but only for maturity index in cross 2. Epistasis was not important for the desired traits in either population. Significant additive effects suggest that effective selection for early maturity, seed weight and yield is possible. Selection for seed weight could be accomplished in the F2 generation in both crosses. Selection for early maturity would be more effective in later generations. Narrow sense heritability (h2) was estimated using variance components in F2 generation and two backcrosses.2 Narrow sense heritability estimates were fairly high for seed number (0.83) and pod length (0.43) in cross 1 and for all the traits except yield/plant in cross 2. The results suggested that selection for seed number, pod length and seed weight is possible in early segregating generations in both the crosses while for early maturity it is possible in cross 2 only. For yield selection would be more effective in later generations. Correlations of maturity with seed number and shelling percentage were positive and highly significant in both the crosses. Maturity was negatively correlated with pod length and seed weight in cross 2. Positive and highly significant correlations for yield per plant with seed number, seed weight and shelling percentage indicated that selection based on any of these traits could indirectly increase yield.

323-335 Download
12
OPTIMIZATION OF METHOD AND TIME OF NITROGEN APPLICATION FOR INCREASED NITROGEN USE EFFICIENCY AND YIELD IN MAIZE
FEROZE AKBAR, ABDUL WAHlD*, SHAMSHAD AKHTAR*, ABID NISAR AHMAD* AND FATEH MUHAMMAD CHAUDHARY

OPTIMIZATION OF METHOD AND TIME OF NITROGEN APPLICATION FOR INCREASED NITROGEN USE EFFICIENCY AND YIELD IN MAIZE
ABSTRACT:
Nitrogen application at 3 different times using 2 methods was used for increasing nitrogen use efficiency of maize in terms of above ground dry matter and grain yield. Side-drilling with 245 g N/plot at sowing and 123 g N/plot soil-dressed at silking significantly improved the vegetative and reproductive growth of maize except number of grains per cob and harvest index. Nitrogen use efficiency in above ground dry matter yield was positively related to plant height, cob length and above ground dry matter, whereas, nitrogen use efficiency in grain yield showed positive relationship with cob bearing plants per plot

337-341 Download
13
ACCUMULATION OF URANIUM IN RAPHANUS SP.
TARIQ M. BHATTI, KHALID MAHMOOD* AND KAUSER A. MALIK

ACCUMULATION OF URANIUM IN RAPHANUS SP.
ABSTRACT:
An appreciable amount of uranium was accumulated by Raphanus sp. growing on heap piles of uranium mine wastes and overburdens in the mining area. About 40 % of the plant samples contained > 5 µg U3 O8 / g on dry weight basis. The descending order of average U content in various plant parts was: leaves > roots > stems.

343-346 Download
14
ISOZYME MARKERS IN COTTON BREEDING-II: INTER AND INTRAVARIETAL VARIATION IN THE ACTIVITY OF ISOZYMES OF THE ENZYME PEROXIDASE AS AFFECTED BY AREA OF COTTON CULTIVATION
SHAFQAT FAROOQ AND HINA SAYYED

ISOZYME MARKERS IN COTTON BREEDING-II: INTER AND INTRAVARIETAL VARIATION IN THE ACTIVITY OF ISOZYMES OF THE ENZYME PEROXIDASE AS AFFECTED BY AREA OF COTTON CULTIVATION
ABSTRACT:
Isozyme peroxidase was studied in different varieties of cotton (Gossypium hirsutum) growing at three different locations to detect possible variation in the activity of peroxidase within a variety growing at three different locations, between different cotton varieties growing at a particular location and to identify possible reason(s) of the observed (if any) variation in Pox. activity as measured by the intensity of isozyme bands observed in the extract of the material collected from different areas. Significant differences were observed in peroxidase activity within the plants of a variety growing at a particular location, between different varieties growing at one location, within a variety growing at three locations and between different loci of a variety growing at all the three locations. Isozymic phenotypes of varieties growing at locations III were significantly different from those growing at other two locations. Locus 4b expressed fully at location I and II while it did not show any activity at location III. Also, locus 3b showed maximum activity in varieties growing at location III while there was no activity at this locus in varieties growing at locations I and II. Prevalence of cotton leaf curl virus (CLCuV) disease at location III could be one of the reasons of observed isozymic variation. It was inferred that instead of different varieties, if similar varieties growing simultaneously at all the three locations were studied, it would have been possible to [rod a locus and/or loci which may show effect of CLCuV. Possibilities of success in such studies and their utilization in breeding cotton varieties having resistance agaist cotton leaf curl virus disease are discussed.

347-359 Download
15
ISOZYME MARKERS IN COTTON BREEDING-III. VARIATION IN THE INTENSITY OF ISOZYMES OF ENZYME PEROXIDASE HIBITED BY DIFFERENT LOCI OF DIFFERENT COTTON VARIETIES AND THERE RELATIONSHIP WITH COTTON LEAF VIRUS DISEASE
SHAFQAT FAROOQ AND HINA SAYYED

ISOZYME MARKERS IN COTTON BREEDING-III. VARIATION IN THE INTENSITY OF ISOZYMES OF ENZYME PEROXIDASE HIBITED BY DIFFERENT LOCI OF DIFFERENT COTTON VARIETIES AND THERE RELATIONSHIP WITH COTTON LEAF VIRUS DISEASE
ABSTRACT:
Isozymes of the enzyme peroxidase was studied in different resistant, tolerant and susceptible varieties of cotton growing at a location known as a hot spot for cotton leaf curl virus disease. Plant material used for extraction was collected from the field in the month of September when leaf curl virus disease its peak and the results were compared with those obtained in July when disease intensity stays in 50 to 80%. Significant differences were observed in the Pox. activity (as measured by the intensity;) exhibited by different loci in different varieties while among different varieties, variation in mean activity of 7 loci was generally not significant. In most of the cases, Pox. activity increased with in virus intensity from July to September. The differences due to locations in Pox. activity exhibited specific locus in a variety were mostly non-significant in September compared to July when they were not. When differences in mean Pox. activities of 3 varieties growing simultaneously at three locations onth of July and September were compared, significant increase in the activity was observed at locus 1 in varieties growing at location-1 while locus 7 exhibited progressive decrease in the activity at location 111. The mean varietal Pox. activity increased in all the varieties and at all the 3 locations but the differences were not significant. Prevalence of cotton leaf curl virus at location-Ill appeared to be positively correlated JS 4a and 6 under low to medium virus intensity while under high virus intensity, locus 2 appeared to lated with increased Pox. activity. Possibilities of using Pox. activity as marker for selection of to be cultivated under the areas of high disease intensity are discussed.

361-370 Download
16
FURTHER STUDIES ON GELIDIUM (RHODOPHYTA) FROM THE COAST OF PAKISTAN
SYED AFAQ-HUSAIN AND MUSTAFA SHAMEEL*

FURTHER STUDIES ON GELIDIUM (RHODOPHYTA) FROM THE COAST OF PAKISTAN
ABSTRACT:
The circumscription of Gelidium pusillum (Stackhouse) Le Jolis has been discussed and a new taxon G. pusillum var. pakistanicum Afaq-Husain et Shameel is described. The vegetative, anatomical arid reproductive structures of the Pakistani populations of this species have been investigated in detail. The new variety showed distinctive characters as turf or cushion forming habit, the primary erect fronds being teretocompressed below and becoming flat in the upper half, plants up to 11 mm in length appearing distinctly segmented under microscope, random arrangement of surface cells as well as of tetrasporangia borne on stichidia-like structures as well as on the tips of branch fronds, presence of rhizines in abundance and sexual plants not being present. This species has also been compared with G. usmanghanii Afaq-Husain et Shameel.

371-382 Download
17
AN UNUSUAL FLAT SPECIES OF CODIUM (CODIALES, CHLOROPHYTA) FROM THE COAST OF PAKISTAN
MOHAMMED NIZAMUDDIN

AN UNUSUAL FLAT SPECIES OF CODIUM (CODIALES, CHLOROPHYTA) FROM THE COAST OF PAKISTAN
ABSTRACT:
A new species. Codiurn gerloffi has been described from the coast of Pakistan, which differs from other species of the genus in being unusually flat in form.

383-386 Download
18
EM AND VAM TECHNOLOGY IN PAKISTAN V: RESPONSE OF CHICKPEA (CICER ARIETINUM L.) TO CO-INOCULATION WITH EFFECTIVE MICROORGANISMS (EM) AND VAMYCORRHIZA UNDER ALLELOPATHIC STRESS
RUKHSANA BAJWA, ARSHAD JAVAID AND BUSHRA HANEEF

EM AND VAM TECHNOLOGY IN PAKISTAN V: RESPONSE OF CHICKPEA (CICER ARIETINUM L.) TO CO-INOCULATION WITH EFFECTIVE MICROORGANISMS (EM) AND VAMYCORRHIZA UNDER ALLELOPATHIC STRESS
ABSTRACT:
A pot experiment was conducted to study the tolerance induced by vesicular arbuscular mycorrhizal fungi (VAM) and effective microorganisms (EM) in chick pea (Cicer arietinum L.) against allelopathic stress caused by aqueous leaf extract of Syzygium cumini (L.) Skeels. The adverse impact due to aqueous leaf extract on plant vegetative and reproductive growth and shoot nitrogen content was significantly reduced by the application of EM and VAM, Co-inoculation of EM and VAM was found more effective than inoculation with either alone. However, reduction in shoot phosphorus content due to allelopathic stress could only be compensated by VAM inoculation alone. VAM colonization was stimulated by EM application.

387-396 Download
19
MULTIPLICATION OF PLANT GROWTH-PROMOTING RHIZOBACTERIA FOR USE IN THE CONTROL OF ROOT ROT DISEASE OF CROP PLANTS
ISHRAT IZHAR, IMRAN ALl SIDDIQUI, SYED EHTESHAMUL-HAQUE AND ABDUL GHAFFAR

MULTIPLICATION OF PLANT GROWTH-PROMOTING RHIZOBACTERIA FOR USE IN THE CONTROL OF ROOT ROT DISEASE OF CROP PLANTS
ABSTRACT:
Efficacy of three strains of Pseudomonas aeruginosa multiplied on wheat bran, rice husk and saw dust evaluated in the control of soil-borne root infecting fungi under screen house and field conditions. Wheat was found as a good substrate for mass multiplication of the bacterium as compared to saw dust and rice husk, Wheat bran inoculum of P. aeruginosa strains significantly (p < 0.05) controlled infection of Macrophomina phaseolina, Fusarium solani and Rhizoctonia solani on cotton under green house and also on sunflower, soybean, uridbean and cotton under field conditions with enhancement in plant growth. Bacterial antagonists showed better biocontrol and growth promoting effects in the screen house as compared to their use in the field.

397-405 Download
20
NEW SPECIES OF CONIOTHYRIUM ON SALVADORA FROM PAKISTAN
S.Q. ABBAS, B.C. SUTTON** AND A. GHAFFAR*

NEW SPECIES OF CONIOTHYRIUM ON SALVADORA FROM PAKISTAN
ABSTRACT:
Ten new species of Coniothyrium on Salvadora spp. viz., Coniothyrium pakistanicum, C. oblongatum, undulatum, C. maqsoodii, C. ismailii, C. suttonii, C. sultanii, C. sivanesanii, C. punithalingamii; C. truncatum and an already reported Coniothyrium salvadorae are described, illustrated and compared with related taxa.

407-436 Download
21
LEAF SPOT OF BETEVINE IN PAKISTAN
SALEEM SHAHZAD AND AMER-ZAREEN

LEAF SPOT OF BETEVINE IN PAKISTAN
ABSTRACT:
During a three year survey (1996-99) of betelvine fields in Karachi and Thatta districts of Sindh and area of Balochistan

437-443 Download
22
ADDITION TO SEEDBORNE MYCOFLORA OF MUSTARD (BRASSICA CAMPESTRIS L)
AMER-ZAREEN AND SHARFUNNAHAR

ADDITION TO SEEDBORNE MYCOFLORA OF MUSTARD (BRASSICA CAMPESTRIS L)
ABSTRACT:
Mustard (Brassica campestris L) is an important oil seed crop of Pakistan cultiated over 3,53,900 ha giving an yield of 2,85,600 tonnes annually (Anon.

445-446 Download
23
STUDIES ON THE MASHBEAN (VIGNA MUNGO) IN RAINFED AGRO-ECOSYSTEM
MUHAMMAD ASLAM, N .I. HASHMI AND ALAN. R.A. STAPLETON*

STUDIES ON THE MASHBEAN (VIGNA MUNGO) IN RAINFED AGRO-ECOSYSTEM
ABSTRACT:
On a loam soil having pH of 8.0., water requirements, dry matter accumulation, yield performance, water use efficiency (WUE) and economics of mashbean (Vigna mungo) were studied during kharif 1992 and 1993, at the National Agricultural Research Centre, Islamabad. Water requirement for mashbean growth cycle varied depending upon season, potential evapotranspiration (ETo) and crop coefficients. It ranged from 332.8 mm to 357.8 mm from sowing upto its maturity during 1992 and 1993, respectively. Overall under agroecosystem of Islamabad, rainfall was surplus than water requirements of mashbean. Dry matter (DM) accumulation vs days after planting (DAP), showed sigmoid response curve, Maximum crop growth rates were 15.8 g m-2 d-1from 50 DAP to 79 DAP during 1992 and 21.4 g m-2d-1 from 58 DAP to 77 DAP during 1993, Mashbean produced seed yield of 1147 kg ha-1 (Average of two seasons). Mean water use effeciency of both seasons was 3.4 kg/ha/mm. Net monetary benefits of Rs. 5788 per hectare could be obtained by sowing mash bean under rainfed ecology.

447-454 Download
24
EFFECT OF WATER STRESSES ON THE GROWTH FEATURES OF DIFFERENT MAIZE (ZEA MAYS L.) CULTIVARS
M. AKKAS ALl, A.K.M. GOLAM SARWAR AND A.K.M AZAD-UD-DOULA PRODHAN

EFFECT OF WATER STRESSES ON THE GROWTH FEATURES OF DIFFERENT MAIZE (ZEA MAYS L.) CULTIVARS
ABSTRACT:
A pot experiment was conducted to study the effect of water stresses on the growth features of maize (Zea mays L.) cultivars viz., Amper pop, Bomali, Suvra, Sadaf and Sayar II. The treatments were with soil moisture (control), constant drought, constant saturated soil moisture and waterlogged conditions of soil. The growth features were plant height, base diameter, leaf number and total life span of the plants height, base diameter, leaf number and total life span were severely affected by drought and waterlogged conditions in all the test cultivars with significant effect in drought than under waterlogged. There were little adverse effects in saturated soil moisture condition. Within the treatment, different cultivars suffered at different magnitude. Amper pop was more resistant to both drought and waterlogging as compared to other cultivars.

455-460 Download
25
25-11-10
RESPONSES OF GROWTH, WATER RELATION AND SOLUTE ACCUMULATION IN WHEAT GENOTYPES UNDER WATER DEFICIT

25-11-10
ABSTRACT:
A.H, KHAN, S.M. h-.11JJTA4BAA ND B. KHANZADA

461-468 Download
26
MUTAGENESIS FOR REDUCED PLANT HEIGHT AND HIGH GRAIN YIELD IN JAJAI 77, AN AROMATIC RICE (ORYZA SATIVA L.) VARIETY
A.W. BALOCH, A.M. SOOMRO, G. MUSTAFA, M.S. BUGIDO AND H.R. BUGIDO

MUTAGENESIS FOR REDUCED PLANT HEIGHT AND HIGH GRAIN YIELD IN JAJAI 77, AN AROMATIC RICE (ORYZA SATIVA L.) VARIETY
ABSTRACT:
Ionizing radiation was successfully utilized to develop the mutant variety Jajai 77-30 with reduced plant height and high grain yield from a commercially grown aromatic variety Jajai 77. About 22 % reduction in plant height was recorded in the mutant variety Jajai 77-30 compared with its parent variety. The data of zonal and national trials indicated that the mutant variety Jajai 77-30 had significantly higher (P< 0.05) grain yield than the commercial varieties viz., Jajai 77, Basmati 370 and Basmati 385. The mutant variety Jajai 77-30 yielded 3781 kg/ha during 1990 and 4232 kglha during 1991 in the National Uniform Rice Yield Trials, securing second and first positions, respectively. This mutant has been named as "KHUSHBOO 95" and also released as a rice variety in 1996 for general cultivation in the province of Sindh.

469-474 Download
27
YIELD AND QUALITY OF DIFFERENT RICE (ORYZA SATIVA L.) VARIETIES AS AFFECTED BY SOIL SALINITY
IMDAD ALl MAHMOOD, R.H. QURESI* AND M. ASLAM*

YIELD AND QUALITY OF DIFFERENT RICE (ORYZA SATIVA L.) VARIETIES AS AFFECTED BY SOIL SALINITY
ABSTRACT:
A pot experiment was conducted using six rice varieties viz., NR-I, IR-6, NIAB-6, KS-282, Basmati 370 and Basmati-385 to determine their yield potential and quality under non-saline (1.7 dS m-1) and saline condition (10 dS m-1) by adding appropriate amount of NaCI salt. Basal dose of NPK and ZnSO4 respectively was applied. On an average, the grain yield of rice varieties was reduced by 30% with salinized soil over the normal soil whereas, protein content in rice grain was greater on salinized soil. Among the varieties, NIAB-6 gave better performance with improved grain yield as well as protein contents of both straw and grain.

475-479 Download
28
BOOK REVIEW
SALEEM SHAHZAD

BOOK REVIEW
ABSTRACT:
Research on Plant Viral Diseases in Pakistan - Bibliography and Abstracts. 1999. Compiled by: Saif Khalid. Plant Virology Programme, National Agricultural Research Centre, Islamabad 45500, Pakistan. e-mail: saif@pvirol.sdnpk.undp.org ISBN 9969-8497-00-5. viii+215 pp. Price (including postage): Rs. 300 (in Pakistan), $ 20 (outside Pakistan).

481- Download
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