Genetic variability for quantitative characters among mutagen- derived barley populations
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Seeds of five barley cultivars (clipper, CI, 3576 , proctor, ketch and prior) having contrasting iyelds and adaption characteristics were treated with 0.04M ethyl methanesulphonate (EMS) for 8 hours and populations of M2-derived treated and control lines were assessed in replicated field trials over four different sites in south austrailia in the M4 generation. The treated populations of each of of five cultivars gave significantly reduced mean yields over all sites and exhibited significant increases in genotype variance , compared with the respective control populations similarly, the genotype variances for heading date, plant height and seed weight were significantly increased in the treated populations. The mean heading date of treatd lines of each cultivar , was shifted towards lateness whereas the mean values for height and seed , weight in the treated lines were not significantly altered except for seed weight of prior which was significantly reduced

Increased genetic variability in th M2 generation of three gamma-
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To test the effectiveness of gamma radiation for the induction of quantitative variations, dry seeds of three broad bean varieties (sinjar. Egyptian and French )were exposed

Combined effects of hydrostatic pressure and
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Activity of alkaline phosphatases from differebt growth forms of D sanguinea sea and north sea was measured under hydrostatic

Effect of eythanol on the survival and catalase activity of some filaments fungi under high pressures of oxygen
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Survival of replacement cultures of aspergillus niger, mucor racemosus M. plumbeus and rhizopus oryzae were markedly effected by the presence of one percent ethanol under hyperbaric oxtgen . this effect of ethanol on survval time was accomplained by an initial increase in catalase activity which was maintained for quite prolonged period of time. It is suggested that

Biogenesis of thiophene and selenophene derivatives in liatris sp. And tagetes reecta
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A number of selenophene derivatives were found to be presey in the extracts of the roots of targets and liatris. Studies with radioactive selenium showed that inorganic selenium but not selenomethionine could be incorporated into slenophenes

K contribution to the hitology of root nodules of sesbania sesban L
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Rhizobia entered the root via root hairs and formed infection threads . the nodules were exogenous in origin. A mature nodule consisted of four regions . namely apical meristem, bacteroid region, vascular region ans nodule cortex. The vascular supply of the nodule consisted of 1-2 strands which branched and enriched the bacteroid zone as a skeletal mantle. The vascular bundles were amphicribral. The cortex of 8 weeks old nodules showed a layer of sclereids with heavily lignified walls. Degeneration of the nodule occurred due to the formation of a layer of suberized cells and appearance of tannin bodies at the base of the nodule.

Performance of different graffing methods in
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Six different asexual methods of propagation tried in chiku , (achras sapota L). revealed that percentage of

Taxanomic notes on floria mattei and thespesia L. excorr. From pakistan
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In floria mattei two new combinations are made . typification of thespesia populnea (linn.) sol. Ex corr. Is discussed. Thespesia populnecoids (Roxb) kostel is recorded for the first time from Pakistan.

Zygnema and zygnamopsis in Peshawar
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The paper deals with species Zygnema and zygnamopsis . in all 14 species of zygema and three of zygnemopsis have been collected from Peshawar valley, Pakistan the description of a new species zygnema pakistanica, and an incompletely known species have been described . all these are new records for Pakistan.

The effect of consistant light on vaucheria sessilis (vauch) DC
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A comparative study of the characters of Streptomyces acidophilus ( Jensen , 1928) and the newly isolated acidophilic streptomyces
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Calibration of the cell sap concentration as an index of the need for irrigation of cotton variety D- 9
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