Bidyut kumar Jana | University of Kalyani (original) (raw)

Papers by Bidyut kumar Jana

The vasculature pattern of petal is known as petal venation. In comparison with leaf venation, pe... more The vasculature pattern of petal is known as petal venation. In comparison with leaf venation, petal venation shows greater simplicity and diversity. Present paper deals with the detailed survey of petal venation in vascular plants. (120)

significant researcher, has contributed in the field of Taxonomic Research in India with over 60 ... more significant researcher, has contributed in the field of Taxonomic Research in India with over 60 publications including 3 reference books and 1 -edited book with all books having ISBN Number, within a span of less than 4 years of Research, prior to submission of his Ph.D. Thesis.

Abstract The present paper deals with the detail anatomical features of cypselas of 38 species of... more Abstract The present paper deals with the detail anatomical features of cypselas of 38 species of the family Compositae. All the studied cypselas are round to elliptical to triangular to spheroidal to pentangular to cylindric in cross sectional configuration and with cellular variations, specially in mesocarpic region. Actually, pericarp is differentiated into 3 layers- epicarp, mesocarp and endocarp. In some cypselas (Leontodon crispus, Hieravium racemosum, Crepis dioscoridis, Crepis alpine, Crepis aspera, Crepis neglecta, Solidago virgaurea, Solidago canadensis, Centaurea aspera, Centaurea sabiosa, Centaurea stoebe, Vernonia ceneria, Vernonia galamensis, Vernonia hymenolepis, Vernonia stenolepis, Acanthospermum hispidum, Tridax procumbens, Pulicaria dysentrica, Telekia speciosa, Media elegans ) mesocarpic region is homomorphic, whereas in remaining 18 cypselas, mesocarpic region is heteromorphic i.e. presence of distinct cellular variations in mesocarpic region. Anatomically, phyt...

This paper deals with the details variation of petal venation in Kallstroemia pubescens of the fa... more This paper deals with the details variation of petal venation in Kallstroemia pubescens of the family Zygophyllaceae. In the present study, from a pool of 100 petals, 40 petals were selected randomly to observe the variation of venation patterns of petals in different flowers of same species collected from different population of the same ecological area. All the 40 petals examined, as per Foster's classification, shows various type of anastomoses. Detailed study reveals that after the entry of a single vain in a petal, it divided into two costals and one median. Actually anastomosis takes place between the sister's branches of the costal or between a branch of the costal and a branch of the medion. Present observation on the anastomosis of the petal venation of the K. pubescens is clearly fits with the study of Foster (1968). At the basal region of petal, Type-I(35.2%) and Type-II(35.2%) are more prevalent, than Type-III (5.8%), Type-VI (5.8%) and Type-V (17.5%).At the middle region of petal, Type-II (47.56%) is more prevalent than Type-I (17.07%), Type-V (13.41%), Type-III (13.41%), Type-IV (4.8%) and Type-VI (3.65%). At the distal region, Type-II (44.7%) is more prevalent than Type-III (33.33%), Type-I (10.41%), Type-V (8.33 %), Type-VI (2.08 %) and Type-IV (1.04 %).

The composite structure of style base and associated nectariesof Asteraceae is called stylopodium... more The composite structure of style base and associated nectariesof Asteraceae is called stylopodium
(Plural- Stylopodia) and whichis present at theupper part of cypsela (Mukherjee, 2005). Not only
in the membersof the family Asteraceae, is it also present in the family Apiaceae. Actually,
stylopodium is the modified, persistent style base. The stylopodiafrom maturecypselas in 29
species ofAsteraceae have been studied with the help of Scanning Electron Microscope

Detailed anatomical features of cypselas of five species (Calendula arvensis L., Calendula madere... more Detailed anatomical features of cypselas of five species (Calendula arvensis L., Calendula maderensis DC., Calendula stellata Cav., Calendula suffruticosa Vahl ssp. suffruticosa and Osteospermum vaillantii (Decne.) Norl.) of the tribe Calenduleae have been studied to observe the variation pattern among them. Among the five cypselas, in case of C. stellata, mesocarpic region is made up of only parenchyma cells, containing pits. In remaining four cypselas, mesocarpic region is made up of both parenchyma and sclerenchyma cells. In the cypsela of O. vaillantii, vallecular cavity is present in mesocarpic region. This cavity is absent in remaining four cypselas. In the cypsela of C. arvensis and C. suffruticosa, secretory duct exists in mesocarpic region, which is absent in remaining three cypselas. In the cypsela of C. arvensis and C. maderensis, six vascular traces are present in mesocarpic region, whereas in O. vaillantii, eight vascular traces; in C. stellata, five vascular traces; in C. suffruticosa, four vascular traces are present in mesocarpic region. Based on the above mentioned anatomical features, an artificial key to the species has been constructed.

Cypselar morpho-anatomy is very helpfull for the separation of taxa in fruting stage. For this p... more Cypselar morpho-anatomy is very helpfull for the separation of taxa in fruting stage. For this
purpose, three species of the tribe Coreopsideae have been studied to separate the taxa more clearly.
Morphologically, cypselas are either homomorphic {Bidens cernua and Cosmos sulphureus) or
heteromorphic (Bidens pilosa). In Cosmos sulphureus, pappus is absent. Whereas in others, pappus is
present. Pappus is represented by retrosely barbed awn-like structure. In Cosmos sulphureus, stylopodium
is enlarged, knobe like structure whereas in the remaining, stylopodia are prominent but not enlarged. In
cypselas, carpopodia are symmetric and carpopodial cells are arranged in 1-3 rows. Anatomically, in all die
studied cypselas, phytomelanin layer is present in mesocarpic region but discontinuously developed, but
except in Cosmos sulphureus where phytomelanin layer is continuous in rib region whereas in furrow region,
it is discontinuous. Except in Cosmos sulphureus in other cypselas vellicular cavity exist. Testal layers are
made up of crusted layers of parenchyma cells. Based on the aforesaid morpho-anatomical characters,
an artificial key has been presented.
Key words : Cypselar features, Coreopsideae, Asteraceae

Mrinalini Datta Mahavidyapith

This paper deals with the detail morpho-anatomical structures of cypselas of six species (Anthem... more This paper deals with the detail morpho-anatomical structures of cypselas
of six species (Anthemis maritima, Artemisia vulgaris, Tanacetum
parthenium, Tanacetum vulgare, Tripleurospermum inodorum and
Tripleurospermum maritimum ) of the tribe Anthemideae. Except the
cypselas of Tanacetum vulgare and Tripleurospermum inodorum, the
remaining 4 studied cypselas are heteromorphic. In the cypsela of
Anthemis maritima, bristelate pappus is present, whereas in remaining 5
studied cypselas pappus are absent. Stylopodium is very prominent,
enlarged and dome shaped in the cypsela of Anthemis maritima,
whereas in remaining studied cypselas stylopodia are inconspicuously
developed. In the cypsela of Anthemis maritima, Tanacetum vulgare,
Artemisia vulgaris and Tripleurospermum inodorum true carpopodia are
present i.e. histologically carpopodial cells are clearly distinct from the
remaining part of cypsela. Remaining 2 studied cypselas, carpopodial
cells are not clearly distinct from the remaining part of cypsela i.e.
pseudocarpopodia. Anatomically all the studied cypselas are elliptical to
trigonos to tetragonus in cross sectional configuration. In the cypsela of
Anthemis maritima and Tripleurospermum inodorum, mesocarpic region
is heterogeneously developed, whereas in remaining 4 studied cypselas,
mesocarpic region is homogenously developed. Vellicular cavity is present
in the mesocarpic region of the cypsela of Anthemis maritima and
Tripleurospermum maritimum. Cypselas of Artemisia vulgaris, vellicular
cavity is present at the lower region of testa, near the lateral lobe
region of cypsela. Secretary ducts are present in the mesocarpic region
of the cypselas of Tanacetum parthenium. Testal layer is uniseriately
developed in case of all the studied cypselas. In the cypsela of
Tripleurospermum inodorum and Anthemis maritima endosperm layers
are uniseriately develop but in 4 studied cypselas, endosperm layer is
biseriately developed. The morpho-anatomical features of the above
studied cypselas have been investigated to establish their potential
usefulness in taxonomy.

Indian Journal of Applied and Pure Biology

The present paper deals with the detailed morpho-anatomical features of cypsela of Calea cymosa ... more The present paper deals with the detailed morpho-anatomical
features of cypsela of Calea cymosa of the tribe Neurolaeneae.
Morphologically, special attention has been taken to the surface, pappus
structure, stylopodium and carpopodium. Anatomically, mesocarpic
region is more interesting than other layer of pericarp. Mesocarp is
made up of both parenchyma and sclerenchyma cells. In between this
two cellular zones, phytomelanin layer exist; discontinuously arranged.
Testa and endosperm layers are parenchymatous, uni-seriately arranged.

Flora and Fona

The morphology and anatomy of cypsela of the species Chaenactis fremontii A. Gray, belonging to t... more The morphology and anatomy of cypsela of the species Chaenactis fremontii A. Gray, belonging to the tribe
Chaenactideae was examined. Mature cypsela of this species showed prominent ribs on the surface. Carpopodium was
basal, asymmetric, irregular ring like. Carpopodial cells with thick walled, small, square, not pitted, arranged in two rows.
Surface was pubescent. Surface hair was ascending to inclined in orientation with the surface. Stylopodium was very
inconspicuous. Pappus was represented by, plumose type of pappus bristles, unequal, yellowish. Mesocarpic region was
heterogeneous and made up of outer and inner mesocarp. Phytomelanin layer was present in between outer and inner
mesocarpic region and discontinuously arranged. Both the testa and endosperm layers were uni-seriately arranged.

J. Botan. Soc. Bengal, Jun 30, 2014

Detailed morpho-anatomical features of cypselas of 3 species (Cichorium endivia, Microseris lanc... more Detailed morpho-anatomical features of cypselas of 3 species (Cichorium endivia, Microseris
lanceolata and Prenanthes purpurea) of the tribe Lactuceae have been studied. Special attention has
been taken to the surface, nature of pappus, stylopodia, carpopodia etc. Anatomically mesocarpic
region is very interesting. In all the studied cypselas, vellicular cavity is present in the mesocarpic
region. In the cypsela of Cichorium endivia, testal layer is made up of U- shaped, thick walled,
parenchyma cells, whereas in remaining 2 studied cypselas, testal layer is made up of crusted layer
of parenchyma cells.
Key words: Cypselar morpho-anatomy; Lactuceae; Compositae

Journal of Swami botanical club

Cypselar morpho-anatomy is very helpfull for the separation of taxa in fruting stage. For this pu... more Cypselar morpho-anatomy is very helpfull for the separation of taxa in fruting stage. For this purpose, three species of the tribe Coreopsideae have been studied to separate the taxa more clearly. Morphologically, cypselas are either homomorphic {Bidens cernua and Cosmos sulphureus) or heteromorphic (Bidens pilosa). In Cosmos sulphureus, pappus is absent. Whereas in others, pappus is present. Pappus is represented by retrosely barbed awn-like structure. In Cosmos sulphureus, stylopodium is enlarged, knobe like structure whereas in the remaining, stylopodia are prominent but not enlarged. In cypselas, carpopodia are symmetric and carpopodial cells are arranged in 1-3 rows. Anatomically, in all die studied cypselas, phytomelanin layer is present in mesocarpic region but discontinuously developed, but except in Cosmos sulphureus where phytomelanin layer is continuous in rib region whereas in furrow region, it is discontinuous. Except in Cosmos sulphureus in other cypselas vellicular cavity exist. Testal layers are made up of crusted layers of parenchyma cells. Based on the aforesaid morpho-anatomical characters, an artificial key has been presented.

Journal of Economic and Taxonomic Botany

The present paper deals with the structure and distribution of trichomes on the mature cypselar s... more The present paper deals with the structure and distribution of trichomes on the mature cypselar surface, with the help of both light microscopic and some with SEM observation. On the basis of the distribution of trichomes, 54 species of Compositae were studied. Among the studied cypselas, in maximum cases, non-glandular trichomes are present (Lactuca pseudoumbrella,

Mrinalini Datta Mahavidyapith

Indian Journal of Applied and Pure Biology

Flora and Fona

J. Botan. Soc. Bengal, Jun 30, 2014

Journal of Swami botanical club

Journal of Economic and Taxonomic Botany

Asteraceae or Compositae are regarded as one of the most advanced families of the dicotyledons. I... more Asteraceae or Compositae are regarded as one of the most advanced families of the dicotyledons. It is characterized by some characters, one of them is fruit. Fruit is developed from inferior, bicarpellary, one seeded structure, which is technically termed as achene or cypsela. In mature cypsela fruit wall or pericarp is either addpressed with seed wall or secondarily separated from seed wall. In mature cypsela, seed wall may or may not be associated with endosperm and endosperm layer exists in mature cypsela either one or two layers. The paper deals with cypselar morphology of 27 species from 11 genera of the family Asteraceae. Morphological features of the size, shape, colour of cypselas, apical part, surface hair, location of vascular trace, presence or absence of phytomelanin layer, structure of carpopodium and their cellular arrangements, pappus structure, stylopodia etc. are taxonomically significant. Exomorphic characters of cypselas serve as reliable taxonomic marker in systematic study. Artificial key prepared based on studied cypselar morphology for the identification of species has been provided.