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Plant Biol (Stuttg) 2003; 5(4): 419-422
DOI: 10.1055/s-2003-42708
Original Paper

Georg Thieme Verlag Stuttgart · New York

Homomorphic Self-Incompatibility, with Stylar Rejection Site, in Luehea grandiflora Mart. and Zucc. (Tiliaceae-Malvaceae s.l.)

P. E. Gibbs 1 , 2 , P. E. Oliveira 2 , N. Taroda Ranga 3
  • 1Plant Science Laboratory, School of Biology, The University of St. Andrews, St. Andrews, Scotland UK
  • 2Instituto de Biologia, Universidade Federal de Uberlândia, Brazil, Cxp 593, Uberlândia MG 38400-902, Brazil
  • 3Departamento de Zoologia e Botânica, IBILCE, UNESP, Campus de São José do Rio Preto, São José do Rio Preto SP, Brazil
Further Information

Publication History

Publication Date:
02 October 2003 (online)

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Abstract

The breeding system of Luehea grandiflora (Tiliaceae-Malvaceae s.l.) was investigated using hand pollinations and fluorescence microscopy studies of pollen tube growth. Although selfed flowers persisted for some 10 days, our study indicates that L. grandiflora is self-incompatible, with self pollen tube inhibition in the upper style, as occurs in many taxa with homomorphic, gametophytic self-incompatibility (GSI). L. grandiflora is only the second species reported within the Malvales with homomorphic stylar inhibition. This result is discussed within the context of a report for self-compatibility in this species, and we also consider the phylogenetic implications for the occurrence of GSI in the family Malvaceae s.l.

Key words

Malvales - Luehea - breeding system - self-incompatibility - homomorphic gametophytic self-incompatibility - late-acting self-incompatibility.

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1 We follow [Cunha (1985)] who considered L. grandiflora to be the correct name for this widely distributed Brazilian species, with L. speciosa restricted to Central America and N Colombia.

P. E. Gibbs

Plant Science Laboratory, School of Biology
The University of St. Andrews

St. Andrews KY16 9AJ

Scotland UK

Email: peg@st-andrews.ac.uk

Section Editor: G. Gottsberger

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