04064nab a2200325 i 4500003000900000005001700009008004100026040001800067072001400085072000800099100003400107100003700141100002000178100002300198100002600221100002900247100003100276100003400307245011200341500005700453520143100510520143101941650001903372650002303391650001503414650002503429650002503454773018103479856007803660BR-BrBNA20260505154442.0260505b2020    bl.qr|pooa||| 00| 0 eng |  aBR-BrBNAbeng  aF30b1116  aH20  aFantinel, Vinícius Spolaor   aMuniz, Marlove Fátima Brião   aPoletto, Tales   aHarakava, Ricardo   aCiotta, Marlise Nara   aSavian, Lucas Graciolli   aFavaretto, Renata Fontana   aKrahn, Jaqueline Raquel Tomm   aPathogenicity and susceptibility/resistance reaction of feijoa (Feijoa sellowiana) cultivars to anthracnose  a

Publicação online; 25 ref.; Summaries (En, Pt)  a


ABSTRACT:        The objective of this study was to determine the pathogenicity of Colletotrichum theobromicola, C. siamense and C. fructicola, C. nympahaeae and C. pseudoacutatum to feijoa, as well as to study the susceptibility/resistance reaction of the commercial  cultivars  “Alcântara”,  “Helena”,  “Mattos”,  and  “Nonante”  to  anthracnose.  For  that,  spore  suspensions  (106  spores  mL-1)  of  the  Colletotrichum  isolates  were  prepared  from  colonies  grown  for  seven  days  in  Mathur  medium.  Ten  fruits  at  the  medium  stage  of  development  of  each  cultivar  were  used  for  the  inoculation  of  each  isolate.  First  the  fruits  were  disinfested  superficially, then they were accommodated in polypropylene trays and the suspension was applied in three places on the fruit’s surface, without injury. All those species are pathogenic to feijoa, as they reproduced the original symptoms of anthracnose. The susceptibility of cvs. “Helena” and “Nonante” were influenced by the specific variability of the pathogen. The cv. “Alcântara” is susceptible and cv. “Mattos” is resistant to all tested Colletotrichum species. Thus, cv. “Mattos” is the most suitable feijoa cultivar to reduce anthracnose levels in orchards in a conventional, integrated or organic cultivation system.  


Key words:      breeding program; Colletotrichum spp.; inoculation  a


RESUMO:       Objetivou-se  determinar  a  patogenicidade  de  Colletotrichum  theobromicola, C.  siamense  e  C.  fructicola, C. nympahaeae  e  C.  pseudoacutatum,  a  goiabeira-serrana,  bem  como  estudar  a  reação  de  suscetibilidade/resistência  das  cultivares comerciais “Alcântara”, “Helena”, “Mattos”, e “Nonante” à antracnose. Para tanto, a partir de colônias com sete dias de crescimento em meio Mathur, foram preparadas suspensões de esporos (106 esporos mL-1) dos isolados de Colletotrichum. Foram utilizados 10 frutos para cada cultivar os quais foram desinfestados superficialmente, em seguida foram acomodados em bandejas de polipropileno e a suspensão foi aplicada em três locais sobre a superfície do fruto, sem ferimento. As espécies são patogênicas à goiabeira-serrana, pois reproduziram os sintomas originais da antracnose. A suscetibilidade das cvs. “Helena” e “Nonante” foi influenciada pela variabilidade específica do patógeno. A cv. “Alcântara” é suscetível e a cv. “Mattos” é resistente à todas as espécies de Colletotrichum testadas. Dessa forma, a cv. “Mattos” é a cultivar de goiabeira-serrana mais indicada para reduzir os níveis de antracnose nos pomares em sistema de cultivo convencional, integrado ou orgânico.    


Palavras-chave:      programa de melhoramento; Colletotrichum spp.; inoculação  aGOIABA-SERRANA  aDOENÇA DE PLANTA  aANTRACNOSE  aVARIEDADE RESISTENTE  aMELHORAMENTO VEGETAL0 04656dRecife-PE Universidade Federal Rural de Pernambuco 2006o2026-1793tRevista Brasileira de Ciências Agrárias (Brazil)x1981-1160gv. 15(3) p. 1-7; (2020)wBR2026000545  uhttp://www.agraria.pro.br/ojs32/index.php/RBCA/article/view/v15i3a8395/46