Ecoanatomical characterisation of a true mangrove, Aegiceras corniculatum Blanco, found in the West Coast of India.

S Anju, E.V. Anoop, A.S. Vijayan, K Vidyasagaran

Abstract


Aegiceras corniculatum Blanco is one of  the important true mangrove species of the western coast of India. Wood as well as increment core samples were collected from trees having GBH ≥10 cm, from three sites in the western coast of India and wood anatomical features were recorded in the laboratory. The results indicate simple, alternate, diffuse porous vessels; both diffuse and scanty axial parenchyma, homogeneous type III rays, vestured pits, helical thickening, sheath cells, breakdown areas in ray cells and vessel inclusions. A comparison of ecoanatomical characters of this true mangrove species was made with its nearest upland relative belonging to the same family viz.,, Myrsinesandwicensis A. DC. In contrast to its upland relative, Aegiceras corniculatum recorded short vessels with smaller diameter, exceptionally high vessel frequency and high vessel grouping. The vulnerability and mesomorphy ratio of Aegiceras corniculatum recorded were 0.27 and 80, respectively which showed the xeromorphic nature of wood. Modification of hydraulic architecture of Aegiceras corniculatumwith respect to ecological condition might be the reason for survival towards the seaward line of mangrove succession and are hence, less vulnerable to cavitation. This causes a safer sap flow in this species.

 


Keywords


Aegiceras corniculatum, Ecoanatomy, Hydraulic conductivity, Mangroves

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References


Anoop, E. V., Job. J. N., and Fasil, M. M. 2013. Eco-anatomical characteristics of the wood of certain selected mangrove species of Kerala. In: Bhatt, J. R., Ramakrishna, M., Sanjappa, M., Ramadevi, O. K., Nilaratna, B. P. and Venkitaraman, K. (eds.), Mangroves in India: their Biology and Uses. Zoological Survey of India, Kolkata, pp. 445-456.

Carlquist S. 2001. Comparative Wood Anatomy (2nd Ed.). Berlin: Springer-Verlag, 460 p.

Carlquist, S. 1977. Ecological factors in wood evolution: A floristic approach. Amer. J. Bot. 64: 887-896.

Carlquist, S. 1988. Comparative Wood Anatomy. Springer-Verlag, Berlin & Heidelberg, 460p.

Givinish, T.J. 1986. Optimal stomatal conductance, allocation of energy between leaves and roots, and the marginal cost of transpiration. In: Givnish, T.J (ed.), On the Economy of Plant Form and Function, Cambridge University Press, Cambridge, pp.171–213

Jeffrey, E.C.1917. The anatomy of woody plants. University of Chicago Press, Chicago, Illinois 150p.

Johansen, D. A. 1940. Plant Microtechnique .Mc Graw-Hill Book Company, New York, 502p.

Kallersjo, M., Bergqvist, G and Anderberg, A. A. 2000. Generic realignment in primuloid families of the Ericales: a phylogenetic analysis based on DNA sequences from three chloroplast Genes and morphology. Am. J. of Bot. 87(9): 1325–1341.

Kathiresan, K. and Bingham, B.2001 Biology of mangroves and mangrove ecosystems. Adv. Mar. Biol. 40, 81-251.

Lens, F. 2005. Systematic significance of wood anatomical characters in Ericales. PhD Thesis. Laboratorium voor Systematiek, K. U. Leuven, Belgium, 290 pp.

Lindorf, H. 1994. Ecoanatomical wood features of species from a very dry tropical forest. IAWA 15 (4): 361-376.

Naskar, K. R. and Mandal, R. N. 1999. Ecology and Biodiversity of Indian Mangroves: (Vol. I). Daya Publishing House, New Delhi, pp.1-754.

TTomlinson, P. B. 1986. The Botany of Mangroves. Cambridge University Press, Cambridge, 419p.

Webber, I. E. 1936. The woods of sclerophyllous and desert shrubs and desert plants of California. Am. J. Bot. 23:181-188

Weerdt, J. D. 2010. Is the wood hydraulic structure contributing to mangrove survival? A wood anatomical comparison with upland relatives. PhD thesis, Vrije University, Brussel, 93 p.


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