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Annals of Botany 61: 377-387, 1988
© 1988 Annals of Botany Company

RESEARCH-ARTICLE

Distribution, Development and Structure of Resin Ducts in Guayule (Parthenium argentatum Gray)

JOY P. JOSEPH, J. J. SHAH* and J. A. INAMDAR

Department of Biosciences, Sardar Patel University Vallabh Vidyanagar 388 120, Gujarat, India

* Address for correspondence: Biotechnology Centre, Department of Microbiology, M.S. University of Baroda, Baroda 390 002, India.

Accepted: 15 November 1987   

The distribution, development and structure of resin ducts in guayule (Parthenium argentatum Gray), the second best source of natural rubber, have been studied. Resin ducts are widely distributed in stem, root, leaf, petiole and peduncle. The ducts in the primary tissues are initiated schizogenously and their further development is schizolysigenous. The ducts in the cortex of the root do not have a well-defined epithelium. Ducts developed from the vascular cambium are initiated and develop schizogenously. Both resin and rubber are produced in the epithelial cells of resin ducts. While resin is secreted into the duct lumen, rubber is stored within these cells. Epithelial cells store more than neighbouring parenchyma cells.

Guayule, rubber, resin, ducts, epithelial cells


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