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Origin, development and structure of spiny projections on the pericarp of Datura innoxia MILL
Author(s) -
Dave Y. S.,
Patel N. D.,
Rao K. S.
Publication year - 1980
Publication title -
feddes repertorium
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.24
H-Index - 25
eISSN - 1522-239X
pISSN - 0014-8962
DOI - 10.1002/fedr.19800910117
Subject(s) - pith , anatomy , spine (molecular biology) , biology , botany , vascular bundle , trichome , epidermis (zoology) , microbiology and biotechnology
The ornamentations called spines of Datura pericarp originate from the local active meristems of the subhypodermal tissue of the ovary wall. The complete development of the spine is traced here. The mature spine is composed of outer epidermis consisting trichomes. A zone beneath the epidermis is 2–3 layered chlorenchymatous cortex with intercellular spaces. The vascular skeleton of spine is branched and anastomosed; and connected at the base with the vascular cylinder of the mesocarp, so the spine is persistent with the pericarp. There are 1–3 vascular bundles in the spine tip. The parenchymatous pith in its basal and middle parts contains starch. The pith at the spine tip and the bundles in the entire spine become sclerenchymatic towards the maturity of the spine. Definition of spiny ornamentations is amended.