Histopathological Studies on Two Symptom Types of Phytoplasma Associated with Lettuce Yellows.
نویسندگان
چکیده
منابع مشابه
The phytoplasma associated with ash yellows and lilac witches'-broom: 'Candidatus phytoplasma fraxini'.
Phytoplasmas associated with the plant diseases ash yellows (AshY, occurring in Fraxinus) and lilac witches'-broom (LWB, occurring in Syringa) represent a putative species-level taxon. Phytoplasmal DNA from 19 ash or lilac sources across the known geographic range of AshY (71-113 degrees W) was examined to determine if AshY and LWB phytoplasmas are a coherent group, if variability exists in bot...
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A phytoplasma was detected in naturally diseased 'Chardonnay' grapevines exhibiting symptoms of Australian grapevine yellows disease. The use of PCR designed to amplify phytoplasma DNA resulted in detection of phytoplasma DNA in all of the diseased plants examined; no phytoplasma DNA was detected in healthy seedling grapevines. The collective restriction fragment length polymorphism (RFLP) patt...
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ABSTRACT Epidemics of aster yellows in lettuce in Ohio are caused by at least seven distinct phytoplasma strains in the aster yellows (AY) group. Five of the strains are newly reported: AY-BW, AY-WB, AY-BD3, AY-SS, and AY-SG. All seven strains were characterized based on symptoms in aster and lettuce, and by polymerase chain reaction (PCR). Strain AY-BD2 (formerly 'Bolt') causes yellowing and l...
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a survey was carried out in citrus nurseries in mazandaran and kerman provinces as the major citrus growing regions of iran. different varieties of orange and tangerine with abnormal symptoms were examined for the occurrence of candidatus liberobacter asiaticus, spiroplasma citri and phytoplasma as the most important vascular limited pathogens in citrus. by visual inspection and molecular exami...
متن کاملOverwintering non-crop sources of aster yellows phytoplasma
Research Overview: This project is directed at further enhancing our present understanding of the epidemiology and overwintering biology of the aster yellows phytoplasma (AYp) with a focus on factors that influence its geographical distribution in the upper Midwest and spread into Wisconsin muck crops. Our current research program focuses on: 1) generating new information about the identity, ge...
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ژورنال
عنوان ژورنال: Japanese Journal of Phytopathology
سال: 1999
ISSN: 1882-0484,0031-9473
DOI: 10.3186/jjphytopath.65.465