Govindappa D Arekal
Articles written in Proceedings – Section B
Volume 58 Issue 6 December 1963 pp 375-385
The paper reports on an embryological investigation of
Volume 64 Issue 5 November 1966 pp 241-257
The young microsporangial wall of
Quadripartition of the microspore mother cells is simultaneous. The pollen grains at the time of release are two-celled.
Development of female gametophyte in the unitegmic, tenuinucellate, hemianatropous ovules conforms to the Polygonum type. An endothelium surrounds the middle part of the mature embryo sac.
The endosperm is
Development of the embryo conforms to the Crucifer type. The cell
The embryological data obtained in the study have been evaluated in the light of previous work in the tribe Digitaleae.
Volume 72 Issue 5 November 1970 pp 221-235
The results of an embryological investigation of
The young anther wall consists of three layers of cells in addition to the glandular tapetum. The tapetal cells become binucleate and the nuclei fuse together. The endothecium acquires fibrous thickenings in later stages and the middle layer disorganizes. Quadripartition of microspore mother cells is simultaneous. The pollen grains at shedding are two-celled and tricolpate.
The ovules on the massive axile placenta of the superior bicarpellary syncarpous ovary are anatropous, unitegmic and tenuinucellate. The development of the embryo-sac conforms to the Polygonum type. The two synergids are posteriorly vacuolate and have tapering anterior ends. The antipodal cells are ephemeral.
The endosperm is
The development of the embryo is of the Crucifer type. The daughter cell of
The seeds are albuminous. The remains of the endothelium and the outer epidermis of the integument constitute the seedcoat.
The results obtained have been evaluated in the light of earlier work in the tribe Gratiolae.
Volume 80 Issue 5 November 1974 pp 226-228