EurekaMag.com logo
+ Site Statistics
References:
52,725,316
Abstracts:
28,411,598
+ Search Articles
+ Subscribe to Site Feeds
EurekaMag Most Shared ContentMost Shared
EurekaMag PDF Full Text ContentPDF Full Text
+ PDF Full Text
Request PDF Full TextRequest PDF Full Text
+ Follow Us
Follow on FacebookFollow on Facebook
Follow on TwitterFollow on Twitter
Follow on Google+Follow on Google+
Follow on LinkedInFollow on LinkedIn

+ Translate

The effects of infection by powdery mildew (Erysiphe graminis f.sp. hordei) and low temperature on the respiratory activity of winter barley


Physiological and Molecular Plant Pathology 39(1): 13-23
The effects of infection by powdery mildew (Erysiphe graminis f.sp. hordei) and low temperature on the respiratory activity of winter barley
The rapid changes in respiratory metabolism that follow exposure of plants grown at cold temperatures to warm conditions have been investigated in barley infected by powdery mildew (Erysiphe graminis f.sp. hordei D.C. Marchal). Total rates of dark respiration, measured between 4 and 20 degrees C, were higher in cold-grown plants (9 +/- 2 degrees C day, 4 +/- 2 degrees C night) than in warm-grown plants (20 +/- 2 degrees C). Infection caused an increase in respiration at all temperatures. Leaves from healthy cold-grown plants showed a marked change in the contribution of the individual components of total respiration in response to increasing temperature; cyanide-sensitive respiration dropped from 71.2 to 42.8%, while cyanide-insensitive respiration increased from 16-4% to 44.0%, over the temperature range 4-20 degrees C. Such changes were inhibited by mildew infection. Mitochondrial respiration exhibited similar trends in response to temperature and infection. Mitochondria isolated from infected cold-grown barley exhibited a higher respiratory control index and a lower ADP:O ratio than those from healthy cold-grown plants. With the exception of a 16% reduction in the fructan fraction in infected barley, there were no significant (P < 0.05) differences in the carbohydrate contents of healthy and infected cold-grown plants. Temperature and infection-induced changes in the pattern of respiration are discussed with respect to plant carbohydrate status and modified mitochondrial efficiency.

Accession: 002249242

DOI: 10.1016/0885-5765(91)90028-G

Download PDF Full Text: The effects of infection by powdery mildew (Erysiphe graminis f.sp. hordei) and low temperature on the respiratory activity of winter barley



Related references

The effect of temperature on infection of barley by powdery mildew (Erysiphe graminis DC. f.sp. hordei Marchal). Zeitschrift fur Pflanzenkrankheiten und Pflanzenschutz 81(10): 597-601, 1974

The effects of plant extracts on powdery mildew in winter barley erysiphe graminis f sp hordei. Mededelingen van de Faculteit Landbouwwetenschappen Universiteit Gent 50(3 PART B): 1153-1162, 1985

Effects of sowing date and vernalisation on the growth of winter barley and its resistance to powdery mildew (Erysiphe graminis f.sp. hordei). Annals of Applied Biology 126(2): 269-283, 1995

Cytological studies of early stages of powdery mildew in barley and wheat. V. Effects of calcium on the infection of coleoptiles of barley by Erysiphe graminis hordei. Canadian Journal of Botany 56(20): 2544-2549, 1978

Resistance of winter barley to powdery mildew (Erysiphe graminis DC ex Merat f. sp. hordei). Hodowla Roslin, Aklimatyzacja i Nasiennictworecd 1986; 28(1): 1-31, 1984

Cytological studies of early stages of powdery mildew in barley and wheat part 5 effects of calcium on the infection of coleoptiles of barley by erysiphe graminis hordei. Canadian Journal of Botany 56(20): 2544-2549, 1978

Influence of planting time on powdery mildew (Erysiphe graminis f. sp. hordei) in winter barley and two-rowed barley. Analele Institutului de Cercetari pentru Cereale si Plante Tehnice Fundulea: 87-392, 1981

Effect of plant extracts on powdery mildew of winter barley, Erysiphe graminis f. sp. hordei. Mededelingen van de Faculteit Landbouwwetenschappen Rijksuniversiteit: 01153-1161, 1985

The effect of plant extracts on powdery mildew of winter barley, Erysiphe graminis f.sp. hordei. Mededelingen van de Faculteit Landbouwwetenschappen Rijksuniversiteit Gent 50(3b): 1153-1161, 1985

Cytological studies of early stages of powdery mildew in barley and wheat VI. Antagonistic effects of calcium and lithium on the infection of coleoptiles of barley by Erysiphe graminis hordei. Canadian Journal of Botany 57(4): 408-412, 1979