Effect of Drought Stress on the Yield and Composition of Volatile Oils of Drought-Tolerant and Non-Drought-Tolerant Clones of Tagetes minuta

M. A.-H. Mohamed; P. J. C. Harris; J. Henderson; F. Senatore

doi:10.1055/s-2002-32072

Planta Medica, Table of Contents

Planta Med 2002; 68(5): 472-474
DOI: 10.1055/s-2002-32072

Letter

Effect of Drought Stress on the Yield and Composition of Volatile Oils of Drought-Tolerant and Non-Drought-Tolerant Clones of Tagetes minuta

M. A-H. Mohamed^1, ³ , P. J. C. Harris¹ , J. Henderson¹ , F. Senatore²

¹School of Science and the Environment, Coventry University, Priory Street, Coventry, UK
²Department of Chemistry of Natural Substances, Faculty of Pharmacy, Naples University ”Federico II”, Napoli, Italy
³Present address: Department of Horticulture, Faculty of Agriculture, Mania University, El-Mania, Egypt

Abstract

A drought-tolerant clone of Tagetes minuta L. (Asteraceae) was selected in vitro on a medium containing 60 mM mannitol. In the greenhouse, a decrease in soil field capacity (FC) from 100 to 40 % reduced oil yield by 49, 71 and 71 % for drought-tolerant, non-drought tolerant cloned and seed-grown plants, respectively. In soil at 40 % FC, the drought-tolerant clone had the highest leaf dry weight and oil yield. At 100 % FC, there was no significant difference in leaf dry weight, but the drought-tolerant clone had a significantly higher percentage oil content and yield than seed-grown plants. The main components of the oil were monoterpenes of which trans- and cis-tagetone together were 52.3 % - 64.2 %. Drought significantly altered the content of some oil components.

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P. J. C. Harris

School of Science and the Environment

Coventry University

Priory Street

Coventry, CV1 5FB

UK

Email: p.harris@coventry.ac.uk

Fax: +44 24-7688 8702