Epidemiology of bacterial leaf stripe disease of arecanut palm

1983 ◽  
Vol 29 (3) ◽  
pp. 249-252 ◽  
Author(s):  
S. N. S. Kumar
Keyword(s):  
Leaf Stripe ◽  
Arecanut Palm

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.

scholarly journals Exhibition of Local but Not Systemic Induced Phenolic Defenses in Vitis vinifera L. Affected by Brown Wood Streaking, Grapevine Leaf Stripe, and Apoplexy (Esca Complex)

Plants ◽  
2019 ◽  
Vol 8 (10) ◽  
pp. 412 ◽  
Author(s):  
Piebiep Goufo ◽  
Ana C. Marques ◽  
Isabel Cortez
Keyword(s):  
Vitis Vinifera ◽  
Latency Period ◽  
Total Phenolic ◽  
Induced Response ◽  
Vitis Vinifera L ◽  
Induced Responses ◽  
Biotic Stresses ◽  
Leaf Stripe ◽  
Long Latency ◽  
Arachidonic Acids

Balance between constitutive and induced responses provides plants flexibility to cope with biotic stresses. This study tested the hypothesis that invasion of grapevine wood by esca-associated fungi induces the production of defensive compounds as part of locally- and systemically-induced responses. In a vineyard, different symptomatic expressions of “Esca complex” in Vitis vinifera L. ‘Malvasia’ were evaluated in annual inspections. Then, levels of phenolics and fatty acids were determined in asymptomatic leaves of brown wood streaking (BWS) and grapevine leaf stripe (GLSD) vines, and in symptomatic leaves of GLSD and apoplectic vines; the results were compared with levels in healthy vines. In asymptomatic leaves of BWS and some GLSD vines, levels of phenolics decreased, independent of the total phenolic group. Such responses were usually associated with an increase in levels of linoleic, γ-linolenic and arachidonic acids, well-known signal transduction mediators. In symptomatic leaves, levels of phenolics increased, which is consistent with a locally-induced response; the onset of symptoms coincided with the highest increases e.g., 35% for quercetin-3-O-glucuronide. Thus, the long latency period between trunk invasion by fungi and visible foliar damage and the year-to-year fluctuation in symptomatic expressions observed with “Esca complex” might be partially attributed to a better utilization of constitutive defenses.

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.

Sign in / Sign up

Export Citation Format

Share Document