Effect of temperature on germination and viability of urediniospores of four races of Puccinia striiformis from barley

Osman-Ghani, N.; Manners, J.G.

doi:10.1016/s0007-1536(83)80075-8

Cited by 8 publications

(5 citation statements)

References 5 publications

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“…Similarly, the germ tube development was low under 15°C and over 25°C. This is similar to the findings of Osman-Ghani and Manners (1983) and Leonard and Martinelli (2005), whose noted that the germ tube growth for P. coronata sharply decreased under 15°C and which was also reported by Kolmer and Chong (1993). Moreover, our studies indicate that both germination and germ tube growth were influenced by the illuminations conditions.…”

Section: Discussionsupporting

confidence: 92%

Applications of response surface methodology approach to determine the effect of temperature, time of incubation and light conditions on germination and germ tube growth of Puccinia coronata f.sp. avenae urediosopores

Benali¹,

Bencheikh²,

Henni³

2011

Afr. J. Biotechnol.

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Crown rust caused by Puccinia coronata f.sp. avenae is the most damaging disease on oat. This work analyzed the effects of temperature and illumination regime during different time of incubation on both spore germination and germ tube growth, using both analysis of variance (ANOVA) and response surface methodology (RSM). This study reveals that the maximum of germination approached 95% under dark conditions at 20°C. Similarly, the maximum germ tube length was 125±23 µm under dark conditions at the same temperature after 18 h. Both spore germination and germ tube growth were observed over a wider temperature range of 5 to 30°C. The darkness conditions seem to enhance significantly (P < 0.05) both the germination and germ tube growth. After 4 h of incubation, germination was significantly higher under darkness regime at 15, 20 and 25°C than under light conditions. The effect of darkness conditions on germ tube growth paralleled its effect on germination. Furthermore, the response surface methodology (RSM) was applied to determine the optimal conditions of temperature, time and illuminations conditions for both the germination process and germ tube growth of urediospores for P. coronata f.sp. coronata. Values for the optimal germination and germ tube growth were 20°C and 8 h under darkness conditions. Moreover, urediospores of P. coronata f.sp. coronata germination and germ tube growth had followed a quadratic response function on temperature (R² = 0.94 and 0.97). On the other hand, the experimental values were in good agreement with the predicted ones and the model was highly significant with the correlation coefficient R being 0.97 and 0.98, respectively for germination and germ tube growth.

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Section: Discussionsupporting

confidence: 92%

Applications of response surface methodology approach to determine the effect of temperature, time of incubation and light conditions on germination and germ tube growth of Puccinia coronata f.sp. avenae urediosopores

Benali¹,

Bencheikh²,

Henni³

2011

Afr. J. Biotechnol.

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“…1936;Straib, 1940;Manners. 1950;Tollenaar & Houston, 1966;Osman-Ghani & Manners. 1983;Tollenaar, 1985).…”

Section: Discussionmentioning

confidence: 99%

The role of temperature and rainfall in the epidemiology of Puccinia striiformis f.sp. tritici in the summer rainfall area of eastern Australia

Park

1990

Plant Pathology

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Infection of wheat seedlings by Puccinia striiformis f.sp. tritici was investigated under both laboratory (constant temperature) and field conditions using a 15‐h period of 100% r.h. In laboratory studies, infection decreased from 100% at 15 4 C to 0.8% at 20.5 C, and it was estimated that no infection would occur at or above 20.8 + 0.2 C. In contrast, high levels of infection occurred under field conditions even when temperatures fluctuated within the range 19–30°C. Overnight infection experiments conducted at Toowoomba over an 18‐month period demonstrated that periods of moisture and temperature favouring infection by P. striiformis f.sp. tritici occurred regularly, even during summer, and that high temperature was a limiting factor on only 3% of the nights tested. This indicates that stripe rust could oversummer readily in this region of the eastern Australian wheat belt, at least in sheltered areas, given a susceptible host. Regression equations relating mean temperature to infection and minimum temperature to infection identified mid to late autumn as an important period in the epidemic development of the disease in this region. The amount of rain recorded during this period was closely associated with subsequent levels of stripe rust observed in commercial crops over the years 1983–87.

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“…The rust isolates employed were those used for spore germination studies (Osman-Ghani & Manners, 1983), kindly supplied by Dr R. H. Priestley, National Institute of Agricultural Botany,' Cambridge. They were B/23 (BYVO), assigned under the old race system to race 23, and three isolates previously assigned to race 24, namely B/24 (BYVl), B/72/32 (BYVl, 2) and B72/14 (virulence factors uncertain).…”

Section: Methodsmentioning

confidence: 99%

Components of partial resistance to Puccinia striiformis in barley

Osman-Ghani

Manners

1985

Plant Pathology

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Substantial differences in the rates of mycelial growth and sporulation of different isolates of Puccinia striiformis were observed when seedling and upper leaves of five barley cultivars with susceptible reaction types were inoculated. The highest rate of mycelial growth was usually on cv. Sultan, followed by Proctor, Astrix, Senta and Zephyr in that order, but more spores were produced on Senta and Astrix than on Proctor, Zephyr or seedlings of Sultan. Host-specific differences between isolates were slight, but some isolates were more aggressive than others, with generally higher mycelial growth and sporulation rates and shorter latent periods. The effect of temperature on sporulation varied little between cultivars or isolates, but there was some evidence of high temperature resistance in Senta and Zephyr. Latent periods were longer on flag leaves than on seedling leaves, and spore production per unit area of leaf infected was lower on the flag leaf of all cultivars except Sultan. Low sporulation rates seemed due to adult plant resistance in Astrix and Senta, and overall resistance, more strongly expressed in adult plants than in seedlings, in Proctor and Zephyr. Sultan exhibited slight seedling resistance, but lacked the adult plant resistance of other cultivars.

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Effect of temperature on germination and viability of urediniospores of four races of Puccinia striiformis from barley

Cited by 8 publications

References 5 publications

Applications of response surface methodology approach to determine the effect of temperature, time of incubation and light conditions on germination and germ tube growth of Puccinia coronata f.sp. avenae urediosopores

Applications of response surface methodology approach to determine the effect of temperature, time of incubation and light conditions on germination and germ tube growth of Puccinia coronata f.sp. avenae urediosopores

The role of temperature and rainfall in the epidemiology of Puccinia striiformis f.sp. tritici in the summer rainfall area of eastern Australia

Components of partial resistance to Puccinia striiformis in barley

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