Ultrastructural localization and epitope mapping of Beet yellows closterovirus replicative proteins

2002 ◽  
Vol 38 (SI 1 - 6th Conf EFPP 2002) ◽  
pp. S104-S107
Author(s):  
T.N. Erokhina ◽  
R.A. Zinovkin ◽  
D.-E. Lesemann ◽  
W. Jelkmann ◽  
A.A. Agranovsky
Keyword(s):  
High Resistance ◽  
Epitope Mapping ◽  
Ultrastructural Localization ◽  
Artificial Infection ◽  
Barley Cultivars ◽  
Leaf Stripe ◽  
Pyrenophora Graminea ◽  
Infection Experiments

A total of 19 Iranian native barley cultivars were in artificial infection experiments tested for resistance against isolate<br />19 of the leaf stripe fungs, Pyrenophora graminea. The cultivar Eram was immune against isolate 19 and the cultivars<br />Jonob, Makoy, C2, showed high resistance with less than 6% plant infected, the cultivars Zarjo, Valfajr, Reyhan, Karun,<br />Karun × Kavir were the most susceptible cultivars.

scholarly journals Evaluation of barley cultivars for resistance to leaf stripe

2002 ◽  
Vol 38 (SI 1 - 6th Conf EFPP 2002) ◽  
pp. 170-173
Author(s):  
H.R. Etebarian
Keyword(s):  
High Resistance ◽  
Artificial Infection ◽  
Barley Cultivars ◽  
Leaf Stripe ◽  
Pyrenophora Graminea ◽  
Infection Experiments

A total of 19 Iranian native barley cultivars were in artificial infection experiments tested for resistance against isolate<br />19 of the leaf stripe fungs, Pyrenophora graminea. The cultivar Eram was immune against isolate 19 and the cultivars<br />Jonob, Makoy, C<sub>2</sub>, showed high resistance with less than 6% plant infected, the cultivars Zarjo, Valfajr, Reyhan, Karun,<br />Karun × Kavir were the most susceptible cultivars.

scholarly journals Effect of several rhizobacteria strains on barley resistance against Pyrenophora graminea under field conditions

2017 ◽  
Vol 10 (1) ◽  
pp. 35-45
Author(s):  
A. Adam ◽  
M.I.E. Arabi ◽  
I. Idris ◽  
E. Al-Shehadah
Keyword(s):  
Early Stage ◽  
Field Conditions ◽  
Bacterial Strains ◽  
Resistance Level ◽  
Barley Cultivars ◽  
Leaf Stripe ◽  
Growing Seasons ◽  
Pyrenophora Graminea ◽  
Barley Leaf ◽  
Barley Leaf Stripe

Summary The effect of Pseudomonas putida BTP1, Bacillus subtilis Bs2500, Bs2504, and Bs2508 strains on the incidence (I) and severity (S) of barley leaf stripe disease caused by Pyrenophora graminea was evaluated under field conditions. Three barley cultivars varying in resistance level were used. The resistance achieved in our study was long-lasting. P. putida BTP1 and Bs2508 were in general the most effective strains in reducing significantly both I and S of barley leaf stripe disease vis-a-vis three cultivars in two growing seasons 2013/2014. The disease was reduced up to 66% in Arabi Abiad treated with P. putida BTP1. The susceptible landrace cultivar Arabi Abiad exhibited a significant induction of resistance by Bs2508 and BTP1. However, the resistant cultivar Banteng did not exhibit significant further increase in resistance by these bacterial strains. The grain yield of bacterized plants artificially inoculated with P. graminea was not affected, except that of the cultivar Arabi Abiad treated with Bs2508 and Bs2504. Triggering of resistance by treating seeds with the bacterial strains would be of great value in agriculture, especially in case of barley infection by P. graminea at an early stage of plant development.

scholarly journals Characterization of barley germplasm for leaf stripe (Pyrenophora graminea) resistance based on incidence and severity parameters

2020 ◽  
Vol 63 (2) ◽  
pp. 113-118
Author(s):  
M. I. E. Arabi ◽  
M. Jawhar ◽  
E. Al-Shehadah
Keyword(s):  
Plant Disease Resistance ◽  
High Yield ◽  
Infected Leaf ◽  
Barley Cultivars ◽  
Leaf Stripe ◽  
Resistant Lines ◽  
Pyrenophora Graminea ◽  
Barley Leaf ◽  
Significant Yield ◽  
Barley Germplasm

Barley leaf stripe (BLS) caused by Pyrenophora graminea is an important seed-borne disease of barley causing significant yield and quality losses worldwide. The development of resistant cultivars has proven difficult, therefore, in this work, BLSresistant barley germplasm was developed by crossing six barley cultivars currently used in Europe and West Asia. Out of 270 doubled haploid lines derived from these crosses, 40 lines were evaluated under field artificial infection conditions using incidence (I; proportion of diseased plants) and severity (S; proportion of infected leaf area per plant). Disease resistance parameters showed a broad range of variation in mean I and S values with a continuum of resistance levels ranging from highly susceptible to highly resistant with values being consistently higher in the susceptible ones. However, eight promising resistant lines with high yield per plant were identified. Moreover, BLS severity increased linearly as incidence increased (r = 0.76, P < 0.001). This work suggests that BLS resistance sources identified in this study can be used for further genetic analysis and introgression for varietal improvement, and that the positive correlation between I and S parameters may be beneficial for many types of studies on this disease.

Pyrenophora graminea. [Descriptions of Fungi and Bacteria].

1973 ◽  
Author(s):  
M. B. Ellis
Keyword(s):  
Geographical Distribution ◽  
Secondary Infection ◽  
Diseased Plant ◽  
Grain Production ◽  
Leaf Stripe ◽  
The World ◽  
Pyrenophora Graminea ◽  
Leaf Shedding ◽  
Dry Out ◽  
Seedling Infection

Abstract A description is provided for Pyrenophora graminea. Information is included on the disease caused by the organism, its transmission, geographical distribution, and hosts. HOSTS: Barley and other Hordeum spp. Also, occasionally, on oats, wheat and rye. DISEASE: Causes leaf stripe of barley. Severe seedling infection can cause stunting and post-emergence death, but symptoms are not usually apparent until later, when long, chlorotic or yellow stripes on leaves and sheaths appear. Most leaves of a diseased plant are usually affected. Dark brown streaks develop later in the stripes, which eventually dry out and cause leaf shedding. Ears may not emerge or be deformed and discoloured. Grain production by infected plants is severely restricted. GEOGRAPHICAL DISTRIBUTION: Widespread distribution; occurs in most barley-growing areas of the world. TRANSMISSION: Seed-borne (49, 1342) usually by mycelium in the pericarp. Perithecia are uncommon, but overwintering sclerotia on crop debris have been reported from Russia (42, 13). Secondary infection by conidia is apparently important only for floral infection and subsequent seed contamination.

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