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Studies in Geraniale: 1. The nodal organization

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Proceedings / Indian Academy of Sciences

Abstract

A study of the nodal organization of 29 members of this order revealed four nodal types: I. Trilacunar three-traced, II. Bilacunar three-traced, III. Bilacunar two-traced and IV. Unilacunar one-traced. Trilacunar three-traced condition has been observed in 25 out of 29 species investigated. Whereas bilacunar two-traced condition is represnted by some half a dozen species, bilacunar three-traced condition and unilacunar one-traced conditions have been observed only inGeranium robertianum andLinum usitatissimum respectively. It is significant to note thatGeranium robertianum in addition shows a trilacunar three-traced and bilacunar two-traced conditions. Trilacunar three-traced condition is considered to be basic for this group and it is believed that the unilacunar one-traced condition is derived by approximation and coalescence of the laterals with the median, followed by the obliteration of their gaps. Such a tendency has been observed in some members of this group and a reduction series has been traced. The mode of branching in Geraniaceae is referred to as sympodial. This has been confirmed by the behaviour of the vascular cylinder at the node.

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References

  • Bailey I W 1956 Nodal anatomy in retrospect;J. Arnold Arbor. 37 269–287

    Google Scholar 

  • Benzing D H 1967a Developmental patterns in the stem primary xylem of woody Ranales I. Species with unilacunar nodes;Am. J. Bot. 54 805–813

    Article  Google Scholar 

  • Benzing D H 1967b Developmental patterns in the stem primary xylem of woody Ranales II. Species with trilacunar and multilacunar nodes;Am. J. Bot. 54 813–820

    Article  Google Scholar 

  • Canright J E 1955 The comparative morphology and relationships of the Magnoliaceae IV. Wood and nodal anatomy;J. Arnold Arbor. 36 119–140

    Google Scholar 

  • Carlquist S 1961Comparative Plant Anatomy (New York: Holt Rinehart and Winston)

    Google Scholar 

  • Dickison W C 1969 Comparative morphological studies in Dilleniaceae IV. Anatomy of the node and vascularization of the leaf;J. Arnold Arbor. 50 384–410

    Google Scholar 

  • Eames A J 1961Morphology of Angiosperms (New York: McGraw Hill Book Company Inc.)

    Google Scholar 

  • Engler A and Prantl K 1931Die Natürlichen Pflanzenfamilien (Band 19a Wilhelm Engelmann: Leipzig)

  • Esau K 1965Plant Anatomy (New York: John Wiley and Sons Inc.)

    Google Scholar 

  • Fahn A and Bailey I W 1957 The nodal anatomy and the primary vascular cylinder of the Caly canthaceae;J. Arnold Arbor 38 107–117

    Google Scholar 

  • Foster A S and Gifford E M Jr 1959Comparative Morphology of Vascular Plants (San Francisco: W H Freeman and Company)

    Google Scholar 

  • Johansen D A 1940Plant Microtechnique (New York: McGraw Hill Book Company Inc.)

    Google Scholar 

  • Kumar A 1976 A new type of nodal organization in angiosperms,Acta Botanica Indica 4 76–77

    Google Scholar 

  • Marsden M P F and Bailey I W 1955 A fourth type of nodal anatomy in dicots. Illustrated byClerodendron trichotomum Thunb;J. Arnold Arbor. 36 1–51

    Google Scholar 

  • Meeuse A D J 1966Fundamentals of Phytomorphology (New York: The Ronald Press Company)

    Google Scholar 

  • *Ozenda P 1949Recherches sur les dicotyledones apocarpiques (Publ. Lab. I’Ecole Normal Supérieure Ser. Biol. Fasc. II Paris)

  • Pant D D and Mehra B 1964 Nodal anatomy in retrospect;Phytomorphology 14 384–387

    Google Scholar 

  • Philipson W R and Philipson M N 1968 Diverse nodal types inRhododendron;J. Arnold Arbor. 49 193–224

    Google Scholar 

  • Singh Asha NEE Kakra 1972 Studies in Euphorbiaceae I. Trends of specialization in nodal vasculature;J. Indian bot. Soc. 51 350–355

    Google Scholar 

  • Sinnott E W 1914 Investigations on the phylogeny of the angiosperms I. The anatomy of the node as an aid in the classification of the angiosperms;Am. J. Bot. 1 303–322

    Article  Google Scholar 

  • Stebbins G L 1974Flowering Plants: Evolution above the species level (London: Edward Arnold Ltd.)

    Google Scholar 

  • Takhtajan A 1969Flowering Plants: Origin and Dispersal (Edinburgh: Oliver and Boyd, Translated from Russian by C. Jeffrey)

    Google Scholar 

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Authors and Affiliations

  1. School of plant morphology, Meerut College, 250 001, Meerut

    Ashok Kumar

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  1. Ashok Kumar
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Research contribution No. 121

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Kumar, A. Studies in Geraniale: 1. The nodal organization. Proc. Indian Acad. Sci. 86, 99–106 (1977). https://doi.org/10.1007/BF03050912

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  • DOI: https://doi.org/10.1007/BF03050912

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