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Embryology ofMicrargeria wightii Benth. (Scrophulariaceae)

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Proceedings / Indian Academy of Sciences

Abstract

The anther is tetrasporangiate. The young microsporangium wall comprises of an epidermis, a fibrous endothecium, a middle layer and a layer of glandular tapetum of binucleate cells. The tapetum is of dual origin and exhibits morphological dimorphism. The development of the female gametophyte conforms to the Polygonum type. An endothelium surrounds the middle part of the embryo sac at maturity. The endosperm isab initio cellular. The chalazal haustorium is single-celled and binucleate. The micropylar haustorium is highly aggressive. To begin with it has two binucleate cells, which subsequently fuse forming a single-celled, quadrinucleate bulbous body. Branched hyphalike tubular processes extending down along the conducting strand of the developing seed reaching almost the chalaza arise from it. The development of the embryo conforms to Crucifer type. The mature seed coat consists of 2–3 layers of cells together with the degenerating remains of the endothelium. The systematic position of the tribe Gerardeae in the subfamily Rhinanthoideae has been evaluated on embryological grounds.

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References

  • Arekal G D 1963a Embryological studies in the tribe Rhinantheae;Can. J. Bot. 41 267–302

    Article  Google Scholar 

  • Arekal G D 1963b Contribution to the embryology ofChelone glabra L.;Phytomorphology 13 376–388

    Google Scholar 

  • Arekal G D 1964 Contribution to the embryology ofGerardia pedicularia L.;J. Indian Bot. Soc. 43 409–423

    Google Scholar 

  • Arekal G D 1966 Embryology ofVeronica serpyllifolia L.;Proc. Indian Acad. Sci. B64 241–257

    Google Scholar 

  • Arekal G D and Raju D 1967 Endosperm in the genusSopubia;Curr. Sci. 36 22–23

    Google Scholar 

  • Arekal G D and Raju D 1976–77 Contribution to the embryology ofBuchnera hispida Ham.;J. Mysore Univ. B27 61–72

    Google Scholar 

  • Arekal G D, Rajeshwari S and Swamy S N R 1970 Contribution to the embryology ofScoparia dulcis L.;Bot. Not. 124 237–248

    Google Scholar 

  • Berg R Y 1954 Development and dispersal of the seed ofPedicularis silvatica;Nytt. Mag. Bot. 2 1–60

    Google Scholar 

  • Hakki M I 1977 Embryologische und morphologische Untersuchengen an Pflanzen aus Sudafrika 1. Uber die Embryologie, Morphologie und Systematische Zugehorigkeit vonDermatobotrys saundersii Bolus.;Bot. Johrb. Syst. 98 93–119

    Google Scholar 

  • Krishna Iyengar C V 1937 Development of embryo sac and endosperm haustoria in some members of Scrophulariaceae I. An account ofSopubia delphinifolia G Don andAlonsoa sp.;J. Indian Bot. Soc. 16 99–109

    Google Scholar 

  • Krishna Iyengar C V 1940 Structure and development of seed inSopubia trifida Ham.;J. Indian Bot. Soc. 19 251–261

    Google Scholar 

  • Krishna Iyengar C V 1942 Development of seed and its nutritional mechanism in Scrophulariaceae Part IRhamphicarpa longiflora Benth.,Centranthera hispida Br. andPedicularis zeylanica Benth.;Proc. Natl. Inst. Sci. India 8 249–261

    Google Scholar 

  • Michell M R 1915 The embryo and endosperm ofStriga lutea;Bot. Gaz. 59 124–135

    Article  Google Scholar 

  • Nagendran C R, Ramakrishna T M and Narayana B M 1980 Development of embryo sac and endosperm haustoria inStriga densiflora Benth. (Scrophulariaceae);Indian J. Bot. 3 51–54

    Google Scholar 

  • Souèges R 1948Embryogenie et Classification (Paris: Hermann et Cie)

    Google Scholar 

  • Srinivasan A R 1946 Morphological and cytological studies in Scrophulariaceae V.Striga euphrasioides Benth.;Proc. Indian Acad. Sci. B24 21–33

    Google Scholar 

  • Tiagi B 1956 A contribution to the embryology ofStriga orobanchoides Benth. andS. euphrasioides Benth.;Bull. Torrey Bot. Club 83 154–170

    Article  Google Scholar 

  • Tieghem M Ph van 1903 Structure de l'etamine chez les Scrofulariacees;Ann. Sci. Nat. 17 363–371

    Google Scholar 

  • Vijayaraghavan M R and Ratnaparkhi S 1972 Some aspects of embryology ofAlectra thomsoni Hook.;Phytomorphology 22 1–8

    Google Scholar 

  • Vijayaraghavan M R and Ratnaparkhi S 1973 Dual origin and dimorphism of the anther tapetum inAlectra thomsoni Hook.;Ann. Bot. 37 355–359

    Google Scholar 

  • Wettstein R 1897 Scrophulariaceae; inDie Naturlichen Pflanzenfamilien (eds) A Engler and K Prantl (Leipzig) Vol IV 39–107

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Authors and Affiliations

  1. Department of Botany, University of Mysore, 570 006, Manasagangotri, Mysore, India

    H G Vijay Gopalraj Urs

  2. Department of Botany, Bangalore University, 560 056, Jnanabharathi, Bangalore, India

    Govindappa D Arekal

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  1. H G Vijay Gopalraj Urs
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  2. Govindappa D Arekal
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Gopalraj Urs, H.G.V., Arekal, G.D. Embryology ofMicrargeria wightii Benth. (Scrophulariaceae). Proc. Indian Acad. Sci. 97, 277–288 (1987). https://doi.org/10.1007/BF03053381

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  • DOI: https://doi.org/10.1007/BF03053381

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