Recent Issues
Uploaded: 15/02/2023 |
Uploaded: 04/01/2023 |
Uploaded: 20/06/2022 |
Uploaded: 23/05/2022 |
|
Year 1972 , Volume 4, Issue 2
Move your mouse curser on the title to view the
abstract of the paper
S.No. |
Title |
Authors |
Pages |
Download |
1 |
THE GENETICS OF FLOWERING TIME
IN RAPHANUS
SATIVUS L. III. EARLY X LATE CROSSES, F, AND
F2GENERATIONSAHSAN A. VAHIDY[1] AND RICHARD W. HARTMANN
THE GENETICS OF FLOWERING TIME
IN RAPHANUS
SATIVUS L. III. EARLY X LATE CROSSES, F, AND
F2GENERATIONS ABSTRACT: Crossing experiments between early flowering and
late flowering lines were conducted in the green-
house. For this purpose, 10
Early and 10 Late plants were divided into two sets
(each set consisting of 5
Early and 5 Late plants). The crosses were made
between Early and Late
plants in all the possible combinations (including
reciprocals) within each set.
No significant differences between the crosses and their reciprocals were found for the time of flowering. The data of both the F, and
F2 plantings were adjusted by comparing with check plants to make the data of these plantings comparable to that of the original
parental planting. Frequency distributions of the Fj and
F2 showed no dominance for the time of flowering and indicated that there probably
| 89-97 |
Download |
2 |
DISTRIBUTION OF
PEROXIDASE IN REGENERATING ROOT SEGMENTS OF TARAXACU M OFFICINALE WEB.M. I. KHAN*
DISTRIBUTION OF
PEROXIDASE IN REGENERATING ROOT SEGMENTS OF TARAXACU M OFFICINALE WEB. ABSTRACT: Qualitative and quantitative measurements of the activity of peroxidase was carried out in the regenerating and non-
regenerating parts
of Taraxacum officinale Web., root cuttings. High peroxidase activity was found in the differentiating tissues as compared to the non- regenerating ones. A relation- ship between the peroxidase activity and the formation of new tissues was observed.
| 99-110 |
Download |
3 |
COMPARATIVE STUDY OF PYRUVIC KINASE AND PHOSPHATASE
IN GLYCOPHYTtC AND HALOPHYTIC SPECIES
OF BEEr ROOTRAFIQ AHMAD
COMPARATIVE STUDY OF PYRUVIC KINASE AND PHOSPHATASE
IN GLYCOPHYTtC AND HALOPHYTIC SPECIES
OF BEEr ROOT ABSTRACT: Effect of sodium ion concentration on potassium dependent pyruvic kinase
reaction was investigated in glycophytic (Beta
vulgaris) and halophytic (Beta
maritima) plants. It was found that synthesis of pyruvic acid is mainly
through phosphatase in B. vulgaris. Where as this was
partly undertaken by kinase in B. maritima. These
| 111-116 |
Download |
4 |
THE EFFECT OF APPLIED GROWTH
HORMONES ON CELL PROLIFERATION IN THE
CAMBIAL ZONE OF THUJA ORIENTALIS L.KHALIDA KHATOON AND A. MAHMOOD
THE EFFECT OF APPLIED GROWTH
HORMONES ON CELL PROLIFERATION IN THE
CAMBIAL ZONE OF THUJA ORIENTALIS L. ABSTRACT: The effect of IAA, GA and Kinetin on cell division in the cambial zone of Thuja
orientalis L. was studied. IAA
was more effective than either GA or Kinetin when used alone. Interaction of growth
substances in the combinations used have shown a greater tendency towards cell divisions for the first 15 days of the experimental period. Between
15-30 days period, number of cells decreased in all experi- ments except where IAA and GA were used together in culture. Maximum number of cells were produced when IAA, GA and Kinetin were used together. Cell division in the cambial zone responded more to growth hormones used in tissue cultures than applied in lanolin. This has been related to better physical conditions prevailing in cultures.
| 117-127 |
Download |
5 |
THE EFFECT OF APPLIED GROWTH HORMONES ON XYLEM
DIFFERENTIATION IN COLEUS BLUM
El STEM TISSUESALEEMA KHATOON AND A. MAHMOOD
THE EFFECT OF APPLIED GROWTH HORMONES ON XYLEM
DIFFERENTIATION IN COLEUS BLUM
El STEM TISSUE ABSTRACT: Xylem differentiation was observed as a response to IAA alone, interaction of IAA and GA and combined effect of IAA, GA and Kinetin. There was no significant difference in the amount of xylem differentiation when
0.1 ppm Kinetin was added
| 129-135 |
Download |
6 |
A CONTRIBUTION TO THE
AUTECOLOGY OF CAPPARIS DECIDUA (FORSK.) EDGEW. II. EFFECT OF EDAPHIC AND BIOTIC
FACTORS ON GROWTH AND ABUNDANCE.M. QAISER AND S. A. QADIR
A CONTRIBUTION TO THE
AUTECOLOGY OF CAPPARIS DECIDUA (FORSK.) EDGEW. II. EFFECT OF EDAPHIC AND BIOTIC
FACTORS ON GROWTH AND ABUNDANCE. ABSTRACT: Soil samples were collected at surface and subsurface
levels from several sites of
occurrence of Capparis decidua (Forsk.) Edgew. The community associates and community dominants of C. decidua were
recorded. Soil was analyzed for texture, structure, consistency, maximum
water holding capacity, wilting coefficient and
hydrogen ion concentration. In angular blocky soil growth was found to be the best
and the abundance was low, while in granular and crumb
soil highest abundance with poor growth was found. In
sub-angular blocky soil structure intermediate
growth and abundance were
observed. Best growth was found in clay loam followed by sandy clay loam soils but the abundance was less in these soils. The highest abundance coupled with poor growth was found in sand while sandy loam and
| 137-156 |
Download |
7 |
GENUS PERIDINIUM EHRE
NBERG, FROM INSHORE WATERS OF KARACHIDURRESHAHWAR HASSAN AND S.M.
SAIFULLAH
GENUS PERIDINIUM EHRE
NBERG, FROM INSHORE WATERS OF KARACHI ABSTRACT: The present paper deals with a study of eleven species
of Peridinium from inshore
waters of Karachi. All the species are first reports from Pakistan’s coastal
area. Peridinium truncatum is recorded from the Indian Ocean for the first time. The species diversity
of Peridinium was very high from October to December,
1970, which is the post- monsoon period in the N. Arabian Sea. Most species indicated the coastal nature of the area under study. The temperature and salinity ranges within which all the species
were found growing in nature are given.
| 157-170 |
Download |
8 |
ON THE MORPHOLOGY
AND DEVELOPMENT OF SOME CHLOROCOCCALES FROM KARACHILFAT ARA AIZAZ AND PHOOL BEGUM FAROOQUI
ON THE MORPHOLOGY
AND DEVELOPMENT OF SOME CHLOROCOCCALES FROM KARACHI ABSTRACT: The morphology and development of eight
species of chlorococcales comprising of 4 genera
viz, Chlorella, Chloeococcum, Monoraphidium and Scened
esmus is described. This survey of plank tonic algae
| 171-181 |
Download |
9 |
MYCORRHIZAE IN THE PAKISTAN ERICALESA. G. KHAN
MYCORRHIZAE IN THE PAKISTAN ERICALES ABSTRACT: Ectendomycorrhizae of the
Pakistan Ericales viz., Rhododendron
lepidotum Wall, ex D.
Don., R. afghanicum Aitch.
& Herasl., Gaultheria trichophylla Royle., Cassiop
e fastigiata D. Don., Pyrola rotundifolia Michx.,
and Monotropa hypopitys L., were described. Microscopic examination showed typical
endophyte in and on the roots and its absence from
aerial or subaerial parts. This was supported by attempted isolation
experiments. Morphological and anatomical studies
suggest a series of increasing saprophytism and
its correlated characters from Ericaceae, through Pyrolaceae to
Monotropaceae. Endogone spores, responsible for the
formation of vesicular- arbuscular mycorrhiza in the majority of plants, were
extracted from heath rhizospheres, except that
of Monotropa hypopitys, but
| 183-194 |
Download |
10 |
FUNGI OF KARACHI— SUPPLEMENT IIABDUL
GHAFFAR AND SYED QAISER ABBAS
FUNGI OF KARACHI— SUPPLEMENT II ABSTRACT: No abstract
| 195-208 |
Download |
11 |
ROOT NODULES IN SOME
MEMBERS OF ZYGOPHYLLACEAE GROWING AT KARACHI UNIVERSITY CAMPUSMOHAMMAD ATHAR AND A. MAHMOOD
ROOT NODULES IN SOME
MEMBERS OF ZYGOPHYLLACEAE GROWING AT KARACHI UNIVERSITY CAMPUS ABSTRACT: Bacterial root nodules in Zygophyllaceae were re'ported from sandy soils of Egypt by Sabet (1946) and Mostafa & Mahmoud (1951). Allen & Allen
(1950) did not find any
endophyte in root nodules
of Tribulus cistoides L. Khan (personal communication) has also reported absence of nodules in Zygophyllaceae. On the basis of these contradictory reports a survey of Zygophyllaceae was made
from Karachi University Campus Area. The soil around this area is poor in nutrition and varies from sand to clay loam
in texture (Qadir et al, 1966). Three genera namely Tribulus, Zygophyllum and Fagonia were surveyed. Fig. 1 shows nodules on roots of Tribulus
| 209-210 |
Download |
12 |
INHIBITION OF CERTAIN
HUMAN PATHOGENIC FUNGI
BY STACHYBOTRYS
ATRAZAHID LATIF BUTT AND ABDUL GHAFFAR
INHIBITION OF CERTAIN
HUMAN PATHOGENIC FUNGI
BY STACHYBOTRYS
ATRA ABSTRACT: With the increasing recognition of fungi as disease causing organisms of man and animal, surveys of soil fungi as sources of new antimycotic agents have
been made (Brian, 1951;
Broadbent, 1966; Blunt & Baker, 1968). The efficacy of griseofulvin, a metabolic product of Penicillium nigricans, P. urticae and P. raistrickii, as a therapeutic agent in the treatment of dermatomycosis is well known (Brian, 1960). Considering the inhibitory effects
of Stachybotrys atra,a dematiaceous fungus and a common soil inhabitant,
towards a number of soil micro- organisms, an experiment was carried out to see its effects on
certain human pathogenic
fungi.
| 211-213 |
Download |
|
Indexing
PJB is indexed
in following international databases: View all
|
Contact Us
Pakistan Journal of Botany,
Botanical Garden, University of Karachi,
Karachi, Pakistan
pakjbot@pakbs.org | Facebook
Hit Counter:
217822, Today's: 1807, Yesterday's: 1768, Country Wise Counter
Copyright © 2017-18 - All Rights Reserved - www.pakbs.org
|