Organization of the Stigma and Transmitting Tissue of Rice, Oryza sativa (L.)

F. Ciampolini; K. R. Shivanna; M. Cresti

doi:10.1055/s-2001-12899

Plant Biology, Table of Contents

Plant Biol (Stuttg) 2001; 3(2): 149-155
DOI: 10.1055/s-2001-12899

Original Paper

Georg Thieme Verlag Stuttgart ·New York

Organization of the Stigma and Transmitting Tissue of Rice, Oryza sativa (L.)[1]

F. Ciampolini ² , K. R. Shivanna ³ , M. Cresti ²

¹ Dipartimento di Scienze Ambientali, Università degli Studi di Siena, Siena, Italy
² Department of Botany, University of Delhi, Delhi 110007, India

Abstract

The stigma of Oryza sativa (L.) is typically dry and plumose. The pistil is bifurcated just above the ovary. The distal parts of the two main branches are densely covered by multicellular, multiseriate papillae. The papillae are covered by a cuticle-pellicle layer. The pecto-cellulosic wall of the papillae is distinctly three-layered. The transmitting tracts of the two main axes are not clearly demarcated, and are made up of several compactly arranged cell layers around the vascular bundle. The cells of the transmitting tissue are polygonal, narrow and elongated. They show plasmodesmata on the transverse, as well as longitudinal walls. The extracellular matrix in the transmitting tissue, containing polysaccharides and pectic substances, is restricted to the corners of the cells, forming long, narrow, linear canals along the axes.

Abbreviations

ECM: Extracellular matrix

Key words

Oryza sativa - stigma and style - transmitting tissue - ultrastructure

Full Text

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1 The present work was initiated just a few weeks before the death of Prof. J. Heslop-Harrison. The authors dedicate the paper to the memory of this irreplaceable teacher.

F. Ciampolini

Dipartimento di Scienze Ambientali
Università degli Studi di Siena

Via P. A. Mattioli n. 4
53100 Siena
Italy

Email: ciampolini@unisi.it

Section Editor: A. M. C. Emons