McAinsh, Martin R. and Ayres, Peter G. and Hetherington, Alistair M. (1989) The respiration of protoplasts from leaves of barley infected by powdery mildew (Erysiphe graminis f.sp. hordei). Plant Science, 64 (2). pp. 221-230. ISSN 0168-9452Full text not available from this repository.
Infection of barley leaves by powdery mildew (Erysiphe graminis f.sp. hordei) causes increased dark respiration, par tof which is associated with active host responses to infection, and a consequence of which is reduced plant growth. The pathogen cannot be grown separately from the host. Therefore, in order to examine those changes in respiratory activity peculiar to the host, attempts were made to isolate protoplasts from infected tissues, and from healthy controls. Isolation of useful numbers (> 106cm−6) of viable mesophyll protoplasts from infected tissues was possible with one among several batches of commercial ‘Cellulysin’ tested; on analysis by sodium dodecyl sulphate-polyacrylamide gel electrophoresis (SDS-PAGE), this batch contained a low molecular weight protein at 20.1 kDa not found in other batches. In all isolated protoplasts, total respiration increased with the age of the source-leaf, but within 24 h of inoculation respiration was stimulated by infection. Protoplasts from infected leaves showed a small initial increase in the cyanide (CN)-sensitive component (cytochrome pathway) of total respiration, but an increase in the CN-insensitive component (alternative pathway) was the major cause of the stimulation of total respiration.
|Journal or Publication Title:||Plant Science|
|Uncontrolled Keywords:||barley ; mesophyll protoplasts ; powdery mildew (Erysiphe graminis hordei) ; dark respiration ; alternative pathway|
|Subjects:||Q Science > QH Natural history > QH301 Biology|
|Departments:||Faculty of Science and Technology > Lancaster Environment Centre|
Faculty of Science and Technology > Engineering
|Deposited By:||Dr Martin R McAinsh|
|Deposited On:||31 Jul 2009 11:27|
|Last Modified:||07 Jan 2015 14:02|
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