Tropicsafe project: Detection and management of lethal yellowing and grapevine yellows diseases in partner countries

2021 ◽  
Vol 11 (1) ◽  
pp. 9-14
Author(s):  
Assunta Bertaccini
Keyword(s):  
Grapevine Yellows ◽  
Lethal Yellowing ◽  
Yellows Diseases

Detection of Phytoplasmas Associated to Grapevine Yellows Diseases in Research and Diagnostics

2017 ◽  
pp. 69-95
Author(s):  
Nataša Mehle ◽  
Maja Ravnikar ◽  
Magda Tušek Žnidarič ◽  
Amal Aryan ◽  
Günter Brader ◽  
...  
Keyword(s):  
Grapevine Yellows ◽  
Yellows Diseases

Grapevine Yellows Diseases and Their Phytoplasma Agents

2017 ◽  
Author(s):  
Marina Dermastia ◽  
Assunta Bertaccini ◽  
Fiona Constable ◽  
Nataša Mehle
Keyword(s):  
Grapevine Yellows ◽  
Yellows Diseases

scholarly journals Yellow Disease of Grapevines: Impact, Pathogen Molecular Detection and Identification, Epidemiology, and Potential for Control

1994 ◽  
Author(s):  
Robert E. Davis ◽  
Edna Tanne ◽  
James P. Prince ◽  
Meir Klein
Keyword(s):  
United States ◽  
The United States ◽  
Effective Control ◽  
Molecular Diagnostic ◽  
Rrna Gene ◽  
Grapevine Yellows ◽  
Weed Host ◽  
Detection And Identification ◽  
The Usa ◽  
Yellows Diseases

Grapevine yellows diseases characterized by similar symptoms have been reported in several countries including Israel, the United States, France, Italy, Spain, Germany and Australia. These diseases are among the most serious known in grapevine, but precise knowledge of the pathogens' identities and modes of their spread is needed to devise effective control stratgegies. The overall goals of this project were to develop improved molecular diagnostic procedures for detection and identification of the presumed mycoplasmalike organism (MLO) pathogens, now termed phytoplasmas, and to apply these procedures to investigate impact and spread and potential for controlling grapevine yellows diseases. In the course of this research project, increased incidence of grapevine yellows was found in Israel and the United States; the major grapevine yellows phytoplasma in Israel was identified and tis 16S rRNA gene characterized; leafhopper vectors of this grapevine yellows phytoplasma in Israel were identified; a second phytoplasma was discovered in diseased grapevines in Israel; the grapevine yellows disease in the U.S. was found to be distinct from that in Israel; grapevine yellows in Virginia, USA, was found to be caused by two different phytoplasmas; both phytoplasmas in Virginia grapevines were molecularly characterized and classified; commercial grapevines in Europe were discovered to host a phytoplasma associated with aster yellow disease in the USA, but this phytoplasma has not been found in grapevine in the USA; the Australian grapevine yellows phytoplasma was found to be distinct from the grapevine phytoplasmas in Israel, the United States and Europe and was described and named "Candidatus phytoplasma australiense", and weed host plants acting as potential reservoirs of the grapevine phytoplasmas were discovered. These and other findings from the project should aid in the design and development of strategies for managing the grapevine yellows disease problem.

Biochemical Changes in Roots of Coconut Palms (Cocos nucifera L.) Affected by Lethal Yellowing

1999 ◽  
Vol 155 (1) ◽  
pp. 48-53 ◽  
Author(s):  
Ignacio Islas-Flores ◽  
Jorge M. Santamaria ◽  
Ivan Cordova ◽  
Carlos Oropeza
Keyword(s):  
Cocos Nucifera ◽  
Biochemical Changes ◽  
Lethal Yellowing ◽  
Cocos Nucifera L

scholarly journals "Candidatus Phytoplasma australiense," a New Phytoplasma Taxon Associated with Australian Grapevine Yellows

1997 ◽  
Vol 47 (2) ◽  
pp. 262-269 ◽  
Author(s):  
R. E. DAVIS ◽  
E. L. DALLY ◽  
D. E. GUNDERSEN ◽  
I.-M. LEE ◽  
N. HABILI
Keyword(s):  
Grapevine Yellows

scholarly journals Unraveling the Etiology of North American Grapevine Yellows (NAGY): Novel NAGY Phytoplasma Sequevars Related to ‘Candidatus Phytoplasma pruni’

Plant Disease ◽  
2015 ◽  
Vol 99 (8) ◽  
pp. 1087-1097 ◽  
Author(s):  
Robert E. Davis ◽  
Ellen L. Dally ◽  
Yan Zhao ◽  
Ing-Ming Lee ◽  
Wei Wei ◽  
...  
Keyword(s):  
16S Rdna ◽  
North American ◽  
Phylogenetic Analyses ◽  
New York State ◽  
16S Rrna Genes ◽  
Rrna Genes ◽  
Vitis Vinifera L ◽  
Polymorphism Analysis ◽  
Ribosomal Protein Genes ◽  
Grapevine Yellows

North American grapevine yellows (NAGY) disease has sometimes been attributed to infection of Vitis vinifera L. by Prunus X-disease phytoplasma (‘Candidatus Phytoplasma pruni’) but this attribution may not be fully adequate. In this study, phytoplasma strains related to ‘Ca. Phytoplasma pruni’ were found in NAGY-diseased grapevines in Maryland, Pennsylvania, Virginia, Ohio, Missouri, and New York State. Based on restriction fragment length polymorphism analysis of 16S ribosomal RNA gene (16S rDNA) sequences, the strains (termed NAGYIII strains) were classified in group 16SrIII (X-disease group) but they contained a recognition site for the restriction endonuclease MseI that is not present in the 16S rDNA of ‘Ca. Phytoplasma pruni’. The 16S rDNA of the strains differed by three or four nucleotides from that of ‘Ca. Phytoplasma pruni’, indicating that they belonged to two novel 16S rDNA sequevars, designated NAGYIIIα and NAGYIIIβ. Both sequevars differed from ‘Ca. Phytoplasma pruni’ by a single base in each of three regions corresponding to species-unique (signature) sequences described for ‘Ca. Phytoplasma pruni’. Phylogenetic analyses of 16S rRNA genes and SecY proteins, and single-nucleotide polymorphism analyses of secY and ribosomal protein genes, further distinguished the two grapevine sequevar lineages from one another and from ‘Ca. Phytoplasma pruni’. The NAGYIIIα and NAGYIIIβ sequevars also differed from ‘Ca. Phytoplasma pruni’ in regions of the folded SecY protein that are predicted to be near or exposed at the outer surface of the phytoplasma membrane. No evidence indicated that diseased grapevines contained any phytoplasma strain conforming to ‘Ca. Phytoplasma pruni’ sensu stricto. Because the NAGYIII sequevars have not been reported in X-disease, a question is raised as to whether NAGYIII and Prunus X-disease are caused by different phytoplasma genotypes.

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