Zobrazeno 1 - 10
of 29
pro vyhledávání: '"Govindappa D. Arekal"'
Publikováno v:
Proceedings of Indian National Science Academy, Vol 48, Iss 5B (2015)
On the Extra-Aquatic Fungi from Polluted and Unpolluted Water of River Kapila, Karnataka
Autor:
C. R. Nagendran, Govindappa D. Arekal
Publikováno v:
Proceedings / Indian Academy of Sciences. 86:287-294
Many anatropous tenuinucellate and bitegmic ovules are present in the trilocular ovary ofIndotristicha ramosissima (Wight) van Royen andDalzellia zeylanica (Gardn.) Wight. The two integuments in both species originate simultaneously. The four nuclei
Publikováno v:
Annals of Botany. 47:735-745
During germination of the ‘seed’ of Balanophora, endosperm cells at the radicular pole grow out as tubular structures and anchor the ‘seed’ to the host rootlet. The radicular tier of cells of the embryo elongate as primary h
Autor:
Govindappa D. Arekal, S. N. Ramaswamy
Publikováno v:
Plant Systematics and Evolution. 138:175-188
Eriocaulon setaceum can be characterized by: young microsporangium wall with epidermis, endothecium (with fibrous thickenings), and glandular tapetum (uninucleate cells); pollen grains 3-celled, spiraperturate; embryo sac development according to the
Publikováno v:
Annals of Botany. 48:853-859
The locus of origin of the inflorescence in the tuber of Balanophora J.R. & G. Forst, is predetermined. A small nest of deep-seated hypodermal cell-layers of the tuber, encircled by composite conducting strands, becomes meristematic and organizes a m
Autor:
R. K. Somashekar, Govindappa D. Arekal
Publikováno v:
CYTOLOGIA. 48:621-625
It is established that heavy metal complex ions and cyanides induce chromosomal aberrations in Allium cepa. It is concluded that these pollutants present in the electroplating waste water increase mutation rates when they are present in high concentr
Autor:
Govindappa D. Arekal, K G Ekanthappa
Publikováno v:
Proceedings / Indian Academy of Sciences. 86:211-216
The embryo sac ofCirrhopetalum fimbriatum is 6-nucleate, generally bisporic, and occasionally monosporic. The reduction of nuclei is due to the ‘strike’ phenomenon. The two chalazal nuclei receive the micropylar polar. The secondary nucleus is tr
Publikováno v:
Proceedings / Indian Academy of Sciences. 90:1-7
The development of the zygote following sexual union inZeuxine longilabris exhibits a predetermined polarity and patternized sequence of developmental stages leading to the initiation of cotyledonary and epicotylary activity in adjacent sectors, both
Autor:
Govindappa D. Arekal, S. N. Ramaswamy
Publikováno v:
Annals of Botany. 49:99-102
Embryo development in Leiothrix nubigena, Paepalanthus bifidus and Syngonanthus nitens is described. Distinct differentiation of cotyledonary and epicotyledonary sectors in the three taxa is demonstrated. The cotyledonary and the epicotylary loci sha
Autor:
Govindappa D. Arekal, S. N. Ramaswamy
Publikováno v:
Caryologia. 34:187-196
SUMMARYThe female gametophyte development in the fourteen investigated taxa of the Eriocaulaceae conforms to the Polygonum type. Three circumaxial antipodal cells are organized at the chalazal pole of the embryosac. The size and form of cells vary in