Production of aneuploidy gametes by monosomics of avena sativa L.
ABSTRACT:
Parental monosomic (2n-1-41 ) derived from three different cultivars of avena saltiva were crossed with another cultivar (sun II) of the same species and their backcross derivatives were compared. On the basis of micronuclei counts od pollen tetrads , it was found that 20- chromosome gametes were produced in disproportionately higher frequency as compared with the normal haploid gametes. Homozygous background results in more deficient gametes.

Studies on the organization of
ABSTRACT:
The classification through heterocaryon and linkage tests of 189

Mitosis in cladosporium herbarum
ABSTRACT:
The paper provides observations on somatic nuclear division in cladosporium herbarum based on light microscopic work outlining the division in fixed and stained hyphae. An intranuclear spindle, developing between a dividing lateral granule or centriole equivalent , is seen in division figures A double-track anaphase configuration peculiar to hyphomycetous nuclei is also observed.

Conidium ontogeny in hyphomycetes the holoblastic conidia of hyphomyces roseus
ABSTRACT:
Conidium ontogeny in hypomyces roseus (=cladobotryum mycophilum (oudem)w . gams and hoozem.) is analysed by time-lapse photomicrography . the fungus isshown to produce conidia holoblastically from a determine ,

The influence of stage of host development on vescular- arbuscular mycorrhizae and endogonaceous spores in field- grown vegetable crops . II winter- grown crops
ABSTRACT:
The pattern of mycorrhizal of roots of the fully grown vegetable crops studied showed three phases , a lag phase , a phase of rapid development and a constant phase . twenty eight days after sowing or transplanting 12.21% of the root length was infected , but the proportion then increased progressively to a more or less constant value which ranged between 58 to 90 % depending upon the host species. With carrot (daucus carota L.) coriander ( coriandrum sativum L.) onion ( allium cepa L.) and fenugreek (trigonella focnunigraecum L.) no constant phase was observed with in the sampling period. No VA mycorrhizae were found in cauliflower ( brassicaoterarea L var. botrytis L.) radishal ( raphanus saltiva L.) turnip ( brassica napobrassica mill ). Spinach beet (beta vulgaris L.spp maritime) and beet (beta vulagaris L.) . during the first 4-8 weeks of crop growth , the endogonaceous spore population of the soil decreased , but then increased to final harvest time.

Vescular- arbusular mycorrhizae in
ABSTRACT:
The incidence of vescuar-arbuscular (VA) mycorrhizae in roots and spores of species of endogonaceous in soil

Studies on the cercospore of pakistan
ABSTRACT:
Seven species of cercosspora viz, C, brachiate, c . catalpa, C. centrostachydis, C. daturicola, C. eucalypti, Cgrewiae and C. polyzonacea are reported for the first time from Pakistan and a new species C ehriticola is described.

Lavatera linn . from Pakistan
ABSTRACT:
One cultivated species lavatera trimestris L. is reported for the first time from Pakistan . one new variety viz, lavatera cachemiriana camb . var. haroonii S. abedin is described.

The life history of cladophora crispate (ROTH) Kg
ABSTRACT:
The life cycle of cladophora crispate (ROTH)kg is different from the rest of the species of the genus. The plant is aploid and the diploid phase is

Effect of salinity on germination , seedling growth and amylase activity in wheat.
ABSTRACT:
Studies on wheat seed germination , shoot growth and x-amylase activity showed that H-68 was comparatively more salt tolerant and mexi-pak most sensitive amongst the various cultivars tested. Seeds of H-68 and mexi-pak contained identical amounts of amylase . however , the enzymes activity in mexi-pak seeds decreased with increase in salnity. An enhancement in the enzyme activity in pressure of gibberellic acid has been observed in both the cultvars.