• K V Krishnamurthy

      Articles written in Proceedings – Plant Sciences

    • On the origin of vascular cambium in dicotyledonous stems

      B G L Swamy K V Krishnamurthy

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      The present paper reviews the relationship between the procambium and the vascular cambium. It is suggested that the procambium is not a pre-requisite for the formation of vascular cambium, even in the stems, as is claimed by several morphologists.

    • On embryos and embryoids

      B G L Swamy K V Krishnamurthy

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      The ontogeny of the embryoids arising from a variety of somatic and male gametophytic tissues has been compared to that of a zygote embryo; it has often been stressed that a free cellrecapitulates the ontogenetic sequence of stages that are seen in the development of a zygote into an embryo. An embryoid significantly lacks a polarised ontogenetic pattern throughout the gamut of differentiation; it lacks typical centres of polar organization like the hypophysis and the epiphysis in early ontogeny; the protoderm formation is belated and also incomplete; the organization of tap root is suppressed. In spite of assuming exomorphic contours comparable with those of the gross developmental stages recognized in embryogenesis consequential to sexual fusion, the embryoid is devoid of internal differentiation both in degree and pattern. Under these circumstances the ontogeny of an embryoid never stands comparison with that of a zygotic embryo. From the morphological standpoint an embryoid is more closely related to a shoot bud.

    • Endosperm controls symmetry changes in the developing embryos of angiosperms

      K V Krishnamurthy

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      During development the angiosperm embryo passes through the filamentous, globular and the cotyledonary phases after undergoing symmetry changes at each of these three steps. Evidences are presented to implicate endosperm control on embryo symmetry.

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