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Year 1980 , Volume  12, Issue 1
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S.No. Title Authors Pages Download
1
Transmission of deficient gametes bu monosomics of avena sativa L.
H.M. I. HAFIZ

Transmission of deficient gametes bu monosomics of avena sativa L.
ABSTRACT:
Parental monosomics (2n-1=4) derived from the cultivars garry (WM 2-1 ) from Canada and borreck (GM I-I) from west Germany , their monosomic F hybrids and BC 1-BC4 to sun II were used to study the transmission of deficient gamtes. The frequency for functional 20- chromosome male gametes was lower in the homozygous than heterozygous monosomics. The 40-, 41- and 42- chromosome progenies in selfed monosomic indivisuals depend upon the proportion of deficient (2n-I) but functional male gametes . the correlation between the proportion of 20-chromosome gametes produced and the proportion that function is significant. (r= 0.86)

1-12 Download
2
Genotype x interaction among mutagen-derived barley populations
A. Ghafoor arain and K.W. shephered

Genotype x interaction among mutagen-derived barley populations
ABSTRACT:
Investigation were conducted on genotype x site interaction of mutagen=derived barely lines in comparision to control over four different sites in south austrailia. Seeds of five cultivars (clipper , C.I 3576, proctor , ketch and prior ) having different yields and adaptation characteristics were treated with 0.04 M ethyl methanesulphonate (EMS) for 8 hours and population of M2- derived

13-30 Download
3
Estimates of genetic variability in mutated populations of triticum aestivum
A.S. LARIK, K.A. SIDDIQUI AND A.H. SOOMRO

Estimates of genetic variability in mutated populations of triticum aestivum
ABSTRACT:
M2 populations of four cultivars of Mexican origin ( miexipak-65, nayab , pak-70 and 6134 x C-271) and two locally bred cultivars (H-68 and C- 591) of braed wheat triticum aestivum (2n=6x= AA BB DD )derived from six irradiation treatments (gamma rays Co60 ; 10, 15, and 20 KR and fast neutrons ; 300, 600 and 900 RADS ) were critically examined for

31-41 Download
4
Abutilon muticum and abutilon pannosum complex
Sultanul abedin

Abutilon muticum and abutilon pannosum complex
ABSTRACT:
Abutilon muticum (Del.ex. DC.) sweet generally considered conspecific with either abutilon

43-48 Download
5
Critical notes on some hibiscus species
Sultanul abedin

Critical notes on some hibiscus species
ABSTRACT:
The present paper deals with critical discussions on hibiscus micranthus L.f.,H aristivalvis garcke and H. purpurreus forssk. H micranthus var. ovalifolius sensu boiss. Generally accepted as a distinct variety is reduced to the synonymy under H. micranthus var. alii S. abedin , which is described as a new variety . H. micranthus var. asper Cuf . is reduced to the synonymy under H. micranthus var. rigidus (L.f.) Cuf.

49-56 Download
6
Studies on the organization of genes controlling lysine biosynthesis in neurospors crassa IV. Segregation patterns, maturity and viability of ascospora and conidiation of some lys05 mutants .
Majeed ahmad and S. haque and M.U. ahmad , A. zaman , M. mohiuddin, Y.A. saeed and A. khairul.

Studies on the organization of genes controlling lysine biosynthesis in neurospors crassa IV. Segregation patterns, maturity and viability of ascospora and conidiation of some lys05 mutants .
ABSTRACT:
Studies on 39 U.V. induced lys-5 mutants have shpwn that a mutation at this locus not only results in a requirement for lysine but also retards the maturation of spores. The mutant spores lack pigment at a stage of development when the wild type spores have acquitted it. Mutant spores are mostly inviable, the inviability of mutant acospores have been found to range from about 70 to 95%. Both the pigments and viability of acspores generally improves with time. In addition to the expcted first and second division, segregation patterns of coloured and colourless spores , 98 different

57-67 Download
7
Effect of different oxygen pressures and of age on changes in catalase and peroxidase activities of rhizopus oryzae under high pressures of oxygen.
Soaliha ahmed

Effect of different oxygen pressures and of age on changes in catalase and peroxidase activities of rhizopus oryzae under high pressures of oxygen.
ABSTRACT:
Changes in catalase activity of rhizopus oryzae on ethanol medium under high pressures of oxygen varied with varying pressure. The optimum pressure for induced increase of catalase was found to be 4 atmospheres. This induced increase in catalae activity was affected by the age of fungus culture , 44 and 69 hour old cultures showed a decrease in enzyme activity under high pressure of oxygen, whereas an increase was observed in 24 hour old culture. Long term studies under optimum pressure and age revealed that the induced changes in catalase and peroxidase activities of R. oryzae are essentially similar under HPO. Where as alchol dehydrogenase exhibits a decrease instead of an increase . these changes in enzyme activities in response to HPO are reversible on returning the treated samples to air.

69-76 Download
8
Influence of salinity
MUSTAFA

Influence of salinity
ABSTRACT:
Rates of gross photosynthesis and

77-80 Download
9
Preliminary investigations on the effect of (2- chloroethyl) trimethylammonium chloride (CCC) on the metabolism of chlorella.
Jamil ahmed and zaib-un-nisa abdullah

Preliminary investigations on the effect of (2- chloroethyl) trimethylammonium chloride (CCC) on the metabolism of chlorella.
ABSTRACT:
Chlorella cultures were grown in light with low and high concentrations of (CCC) and the rate of growth . photosynthesis , respiaratiion, nitrate and nitrite assimilation were studied. CCC at low concentrations up to 6.3 x 10-6M, did onot have any effect on these processes where as at higher concentrations 0.5 x 10-4 to 0.5 to 10-2M, all these processes were affected differently. CCC brings about qualitative change in the soluble pool of the amino acids in treated cells of chlorella.

81-89 Download
10
Qualitative estimation of free
M. athar and A. mahmood

Qualitative estimation of free
ABSTRACT:
Free amino acids in the root nodules of tribulus terrestris L. were

91-96 Download
11
Herbicide influence on germination and seedling growth of vigna mungo(L). hepper and V. radiate (L) wilczek.
S.shahid shaukat , naqvi A. khan and farzana ahmed.

Herbicide influence on germination and seedling growth of vigna mungo(L). hepper and V. radiate (L) wilczek.
ABSTRACT:
Tolerance of vigna mungo and V. radiate to chloro-phenoxyacetic acid, chloro-phenoxybutyric acid and triazine herbicides was evaluated. 2,4-D and 2, 4, 50T were found to be highly inhibitory to germination and early seedling growth of the legumes . MCPB suppressed the germination of V. radiata at > 50 ppm and that of V. mungo at 800 ppm , but inhibited root as well as shoot growth at > 25 ppm. The triazines viz. prometryne and terbutryne , did not inhibit

97-106 Download
12
Effect of aluminium on plant growth and mineral nutrition of barley
S. manzoor alam and W.A. ADAMS

Effect of aluminium on plant growth and mineral nutrition of barley
ABSTRACT:
Batley seedlings were grown in nutrients solution to study the effect of aluminium (0.0. 0.2, and 0.6 mM) on plant growth and mineral nutrition . chlorosis appeared on the young leaves of Altoxic plants and was severe on high Al level . stems of the Al0treated plants were purple. While the roots were short thick and brown in colour . dry matter yield of barley shoot and root decreased progressively with increase in Al-level . the concentration of K. Ca Mg and Mn substantially decreased in shoot and root while P decreased in shoot but it increased in root with high Al compared to control. With increased Al levels the concentrations of Al and Zn increased in shoot and root, while i.e content in shoot was not greatlu affected but in root decrease in Fe

107-113 Download
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