Comparison of hydrocarbon yields in cotton from field grown vs. greenhouse grown plants.

摘要

Four accession of cotton (SA-1181, 1403, 1419, and 2269) were grown both in field conditionsand a greenhouse to compare the environmental effects on leaf biomass, % yield of hydrocarbons (HC),and total HC (g HC /g leaves) under natural and controlled (protected) conditions. Leaf biomass wassimilar but higher in two field cultivated accessions. All four accessions produced higher % HC yieldsunder field conditions, with greenhouse plants producing lower yields ranging from 20.6 to 46.0% asmuch HC as found in naturally grown plants. Total HC yields (g HC / g 10 leaves) were even lower inthe greenhouse with yields being only 19.7 to 39.1% as high as from field grown plants. Overall, theenvironmental component to the yield of free HC in cotton leaves was a major factor, with the geneticcomponent contributing to less than half (46%) of the HC yield. This trend corresponds to literaturereports of large induction of defense chemicals in cotton upon attack by herbivores and diseases. Thesame pattern has been found in sunflowers and is discussed in regards to cotton. Ontogenetic variation inHC for SA-2269 showed HC yields in leaves remained at a constant, low level from bud to flowering,then increased rapidly as bolls matured. Published on-line www.phytologia.org Phytologia 99(3): 200-207 (Aug. 8, 2017). ISSN 030319430.