Biosystematical studies in some taxa of Jatropha Linn

Elumalai, R. and Selvaraj, R. and Chidambaram, A.L.A. (2013) Biosystematical studies in some taxa of Jatropha Linn. International Journal of Current Science (6). pp. 63-69.

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Abstract

Biosystematical studies in four taxa of Jatropha have been made to understand the interrelationship among them. The following are the taxa studied with reference to morphological, anatomical and cytological characters (Jatropha curcas, Jatropha gossypifolia, Jatropha glandulifera, and Jatropha multifida). The study revealed that the various species of Jatropha differ morphologically among one another in leaf shape, size and texture. Anatomically the species of Jatropha differ from one another in epidermal cells; number of stomata; stomatal index and mesophyll tissue. Further, the leaf anatomies reveal a typical dicotyledonous type of leaf with a single palisade layer in all the taxa except J. curcas (two rows of palisade cells) and hence it has increase photosynthetic efficiency than the other species. All the species of Jatropha have the Rubiaceous type of stomata (paracytic). Detailed karyotypic analysis has been made in addition to the study of absolute chromosome length, average chromosome length, total chromosome length, relative chromosome length and arm ratio. In all the species, the chromosome number recorded is 2n=22. The chromosomes were classified on the basis of length of the chromosome, position of the centromere, primary and secondary constructions, presence or absence of satellite

Item Type: Article
Uncontrolled Keywords: Jatropha, morphology, anatomy, cytology, biosystematics
Author Affiliation: Annamalai University, Annamalai Nagar - 608 002, Tamil Nadu, India
Subjects: Crop Improvement
Divisions: Other Crops
Depositing User: Mr T L Gautham
Date Deposited: 29 Mar 2014 10:03
Last Modified: 29 Mar 2014 10:03
URI: http://eprints.icrisat.ac.in/id/eprint/12750

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