• C M Govil

      Articles written in Proceedings – Plant Sciences

    • Floral anatomy and embryology of some species ofCuscuta L.

      C M Govil Seshu Lavania

      More Details Abstract Fulltext PDF

      Floral anatomy ofCuscuta hyalina Roth.Cuscuta europaea L.,Cuscuta chinensis Lamk. andCuscuta calycina Webb, and Berth, and embryology ofCuscuta europaea L.,Cuscuta calycina Webb, and Berth, have been investigated. Sepals, petals and stamens are singlet-traced and the corpels have only the ventral bundles. The disc is ovarian without vascular supply inCuscuta hyalina,Cuscuta chinensis andCuscuta calycina. The placentation is anatomically parietal. The anther wall is 4-layered and pollen is shed at 2-celled stage. Ovule is tenuinucellate, unitegmic and anatropous. Archesporial cell directly functions as megaspore mother cell which gives rise to bisporic Allium type of embryo sac. The synergids are persistent. Endosperm is nuclear and the embryo development follows Solanad type.

    • Stomatal response of chlorocholine chloride and indole-3-acetic acid inCommelina communis L.

      C M Govil

      More Details Abstract Fulltext PDF

      The apertures of stomata on isolated epidermal peels from both the leaf surfaces ofCommelina communis were reduced in response to chlorocholine chloride as the concentrations increased from 0·01–10·0 mol m−3. When chlorocholine chloride was applied in combination with different concentrations of indoleacetic acid, stomatal closure occurred only when a high concentration of chlorocholine chloride was applied with a low concentration of indoleacetic acid, while low concentrations of chlorocholine chloride did not affect the stimulation of aperture caused by indoleacetic acid treatments. Chlorocholine chloride treatments caused depletion of K+ from the guard cells while indoleacetic acid resulted in accumulation of K+.

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