Advanced search
Start date
Betweenand
Related content
(Reference retrieved automatically from SciELO through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Diversity of citrus gummosis in São Paulo State, Brazil

Full text
Author(s):
Alfredo Seiiti Urashima [1] ; Tatiane de Fátima Mistura [2] ; Cassiara Regina Noventa Correa Bueno Gonçalves [3]
Total Authors: 3
Affiliation:
[1] Universidade Federal de São Carlos. Centro de Ciências Agrarias - Brasil
[2] Universidade Federal de São Carlos. Centro de Ciências Agrarias - Brasil
[3] Centro de Tecnologia Canavieira. Fazenda Santo Antonio - Brasil
Total Affiliations: 3
Document type: Journal article
Source: Summa Phytopathologica; v. 42, n. 3, p. 209-215, 2016-09-00.
Abstract

ABSTRACT Citrus gummosis is an important disease because it causes the death of young plants, resulting in their replacement, a costly operation. Its causal agents are different species of Phytophthora. Dissemination of these microorganisms occurs mainly by contaminated nursery trees. Differences in aggressiveness, competitiveness and response to fungicides varied among species of this pathogen. Therefore, this study aimed to examine diversity among citrus isolates of Phytophthora from two different origins in São Paulo State. Thirty isolates from citrus nursery trees from 13 municipalities and 11 from seven commercial orchards were analyzed. Interspecific diversity was performed by species-specific primers and sequencing of the ITS region. Subsequently, intraspecific diversity was carried out with 16 RAPD primers and clustering analysis of UPGMA, using the Dice coefficient. Our data identified only P. nicotianae from either substrates or commercial fields. Isolates clustered into two genetically distinct populations. Genetically similar isolates were also found. The existence of these clonal lineages among isolates from geographically distinct nursery trees suggests an efficient dissemination mechanism. This was the first study to examine the diversity of Phytophthora in citrus from substrates of nursery trees in Brazil. (AU)

FAPESP's process: 12/20406-9 - Inter- and intra specific diversity of Phytophthora spp, the causal agent of gummosis in citrus seedings
Grantee:Tatiane de Fátima Mistura
Support Opportunities: Scholarships in Brazil - Scientific Initiation
FAPESP's process: 12/20758-2 - Inter- and intra-specific diversity of Phytophthora spp, the causal agent of gummosis in citrus seedlings
Grantee:Alfredo Seiiti Urashima
Support Opportunities: Regular Research Grants