Influence of Cladonia substellata Vainio extracts and usnic acid on germination and growth of Allium cepa L. seedlings

Adriana Mayumi Yano-Melo; Carlos Vicente; Lauro Xavier-Filho

doi:10.11646/bde.16.1.5

Issue: Vol. 16 No. 1: (1999)

Type: Article

Published: 1999-12-01

DOI: 10.11646/bde.16.1.5

Page range: 11–15

Abstract views: 114

PDF downloaded: 0

**Influence of Cladonia substellata Vainio extracts and usnic acid on germination and growth of Allium cepa L. seedlings**

Adriana Mayumi Yano-Melo⁺⁻
Carlos Vicente⁺⁻
Lauro Xavier-Filho⁺⁻

Departamento de Micologia, Centro de Ciências Biológicas, Universidade Federal de Pernambuco, Av. Moraes Rego, s/n, Cidade Universitária, 50670-420, Recife – Pernambuco, Brasil

Laboratory of Plant Physiology, Faculty of Biology, Complutense University of Madrid, Madrid, Spain

Laboratório de Tecnologia Farmacêutica, Universidade Federal da Paraíba, Caixa Postal 5009, 58051-970, João Pessoa – Paraíba, Brasil.

Bryophyta Cladonia substellata Allium cepa

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Abstract

The effect of lichen extracts obtained from Cladonia substellata and its main constituent, usnic acid, on the germination and growth of onion (Allium cepa L.) seedlings was investigated. No significant inhibitory effect of the lichen extracts and usnic acid on germination was found, except of usnic acid at the concentration of 726.7 mM. Growth inhibition of the radicle and of the hypocotyl of the seedlings was found for the total extract and for usnic acid in concentrations of 290.6 mM and 726.7 mM.

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