Aggressiveness of Puccinia striiformis isolates on wheat cultivars

Priestley, R. H.; Doling, D. A.

doi:10.1016/s0007-1536(74)80104-x

Cited by 8 publications

(5 citation statements)

References 3 publications

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“…For the light intensity experiments (which were carried out in the glasshouse) seedling leaves were point-inoculated when approximately 200 mm long, using the technique of Priestley & Doling (1974). On the first day of sporulation, leaves with approximately similar infected areas were selected.…”

Section: Methodsmentioning

confidence: 99%

“…Latent period was recorded for each leaf, as was reaction type 5 days after sporulation commenced. Spores were collected by suction on a Millipore filter and counted using a Coulter Counter (Priestley & Doling, 1974) every 2 or 3 days for the 10 or 11 days that the leaves actively sporulated. Collection ceased after day 12, since in this experiment sporulation abruptly stopped after that day due to senescence of the infected area.…”

Section: Methodsmentioning

confidence: 99%

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The effect of temperature and light intensity on growth and sporulation of Puccinia striiformis on wheat

McGregor

Manners

1985

Plant Pathology

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Urediniospore production by Puccinia striiformis on wheat per unit leaf area infected was much lower at low light intensities than at high light intensities. The number of pustules per unit area of infected leaf and the daily sporulation rate per pustule increased linearly with increasing light over the range 10–50 W/m2. Increasing temperature between 7 and 20°C shortened latent period and reduced the longevity of sporulating leaves. Colonization rate and the frequency of pustules per unit area of infected leaf increased between 7 and 15°C but declined markedly at 20°C. Spore production reached its peak earlier and declined more rapidly with increasing temperature between 7 and 15°C. this decline being less marked in the highly susceptible cultivar Maris Beacon than in the more resistant Maris Nimrod and Maris Huntsman.

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Section: Methodsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

The effect of temperature and light intensity on growth and sporulation of Puccinia striiformis on wheat

McGregor

Manners

1985

Plant Pathology

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“…First seedling leaves were inoculated using the method of Priestley & Doling (1974). Spores were picked up on a small block of metal (2 mm diameter) attached to the inside of one arm of a pair of tweezers.…”

Section: Mycelial Growtb Witbin Tbe Leafmentioning

confidence: 99%

“…The length of leaf visibly colonized was measured 21 days after inoculation, using a ruler. Such measurements are equivalent to the pustulation values of Priestley & Doling (1974). There were 20-25 replicates for each treatment.…”

Section: Mycelial Growtb Witbin Tbe Leafmentioning

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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“…On this basis it could be suggested that the recent Pst populations emerging in the USA and Australia carry increased parasitic fitness, which contributed to a major shift in the genetic structure of Pst in both countries. Other components of aggressiveness that have been investigated in Pst have included urediniospore production (Johnson & Taylor, 1972, 1976Milus et al, 2009), lesion length (Priestley & Doling, 1974) and urediniospore germination (Volin & Sharp, 1973).…”

Section: Discussionmentioning

confidence: 99%

Temperature adaptation in Australasian populations of Puccinia striiformis f. sp. tritici

2013

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Stripe rust, caused by Puccinia striiformis f. sp. tritici, is one of the major fungal pathogens of wheat. A new pathotype was introduced to Australia in 2002 and several derivative pathotypes were detected in subsequent seasons. It has been suggested that the severity of stripe rust outbreaks in Australia since 2002 could be as a result of traits other than virulence in the pathogen population. This study was conducted to investigate the hypothesis that the stripe rust pathogen population dominant in Australia since 2002 was better adapted to warm temperature conditions compared to previous pathogen populations. Sixteen pathotypes were selected to examine the influence of two contrasting temperature regimes during the 24 h incubation (10°C and 15°C) and the subsequent post-inoculation (17°C and 23°C) periods on latent period and infection efficiency on four susceptible wheat cultivars. In addition, the effect of two contrasting incubation temperatures on urediniospore germination was examined. The results indicated that pathotypes of P. striiformis f. sp. tritici detected after 2002 did not show evidence of adaptation to high temperatures, which suggests that other factors contributed to the observed increased aggressiveness.

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Aggressiveness of Puccinia striiformis isolates on wheat cultivars

Cited by 8 publications

References 3 publications

The effect of temperature and light intensity on growth and sporulation of Puccinia striiformis on wheat

The effect of temperature and light intensity on growth and sporulation of Puccinia striiformis on wheat

Components of partial resistance to Puccinia striiformis in barley

Temperature adaptation in Australasian populations of Puccinia striiformis f. sp. tritici

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