title: Effect of drought stress on the yield and composition of volatile oils of drought-tolerant and non-drought-tolerant clones of Tagetes minuta.
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.
authors.affiliation: School of Science and the Environment, Coventry University, Priory Street, Coventry, UK.
authors.forename: M A-H
authors.initials: MA
authors.lastname: Mohamed
authors.forename: P J
authors.initials: PJ
authors.lastname: Harris
authors.forename: J
authors.initials: J
authors.lastname: Henderson
authors.forename: F
authors.initials: F
authors.lastname: Senatore
mesh_terms: D000064:Acclimatization / Q000187:drug effects* / Q000502:physiology; D000080462:Acyclic Monoterpenes; D019659:Asteraceae; D004190:Disasters; D008353:Mannitol / Q000008:administration & dosage; D009822:Oils, Volatile / Q000737:chemistry* / Q000302:isolation & purification; D010938:Plant Oils / Q000737:chemistry / Q000378:metabolism*; D013729:Terpenes / Q000737:chemistry / Q000302:isolation & purification; D014867:Water / Q000008:administration & dosage*
chemical_list: D000080462:Acyclic Monoterpenes; D009822:Oils, Volatile; D010938:Plant Oils; D013729:Terpenes; D014867:Water; C121716:2,6-dimethyl-5,7-octadien-4-one; D008353:Mannitol