Characteristics of chloroplast thylakoid lipid composition associated with resistance to triazine herbicides |
| |
Authors: | D. J. Chapman J. De-Felice J. Barber |
| |
Affiliation: | (1) AFRC Photosynthesis Research Group, Department of Pure and Applied Biology, Imperial College of Science and Technology, Prince Consort Rd., SW7 2BB London, UK |
| |
Abstract: | A detailed comparison of the polar-lipid composition of chloroplast thylakoid membranes isolated from triazine-susceptible and triazine-resistant biotypes of Chenopodium album, Senecio vulgaris, Poa annua and Amaranthus retroflexus has been carried out. No major differences in the composition of the bulk lipid matrix were found except for a slightly higher monogalactosyldiacylglycerol to digalactosyldiacylglycerol ratio in resistant compared with susceptible biotypes. There was, however, in the case of resistant plants a higher level of phosphatidylglycerol-containing transhexadecenoic acid in membrane fractions enriched in photosystem two. It is concluded that although the minor differences could contribute to triazine resistance it is more likely that they reflect secondary alterations in membrane organisation associated with changes in relative levels of pigment-protein complexes.Abbreviations DGDG digalactosyldiacylglycerol - MGDG monogalactosyldiacylglycerol - PG phosphatidylglycerol - PSII photosystem two |
| |
Keywords: | Chloroplast thylakoid Herbicide resistance Membrane lipid Triazine |
本文献已被 SpringerLink 等数据库收录! |
|