First Report of Root Rot caused by <i>Rosellinia bunodes</i> on a Poplar Species (<i>Populus deltoides</i>) in Brazil

Santos, Á. F. dos; Thomazi, Heloisa; Duarte, Henrique da Silva Silveira; Machado, Edilene Buturi; Silva, C. N.; Tessmann, Dauri José

doi:10.1094/pdis-09-16-1268-pdn

Cited by 5 publications

(3 citation statements)

References 2 publications

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“…However, teleomorphism is relatively difficult to perform under natural field conditions and in artificial culture media (Hoopen and Krauss, 2006). In these cases, pathogen identification is possible through the use of molecular biology tools (Santos et al, 2017).…”

Section: Discussionmentioning

confidence: 99%

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PHYSIOLOGICAL CHARACTERIZATION OF Rosellinia bunodes AND SYMPTOMATOLOGY OF Rosellinia ROOT ROT IN POPLAR SEEDLINGS

et al. 2018

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Poplar (Populus deltoides) is a forest species that has several phytosanitary problems, such as leaf spots, rusts and root rots. Since 2010, the death of poplar trees has been observed in commercial plantations in the state of Paraná, Brazil, caused by the fungus Rosellinia bunodes. Due to the lack of information about this pathosystem, the aim of this work was to carry out the physiological characterization of R. bunodes isolates collected from P. deltoides and the symptomatological characterization of Rosellinia root rot in the same host. Experiments were conducted at Embrapa Florestas, located in Colombo (PR), Brazil. The mycelial growth of nine R. bunodes isolates was evaluated in four culture media (potato-dextrose-agar, V8-agar, carrot-agar and water-agar) and seven different incubation temperatures (8, 12, 16, 20 24, 28 and 32 °C). The symptomatological characterization of Rosellinia root rot was performed on six-month-old poplar seedlings. The most favorable conditions for mycelial growth of R. bunodes were observed in potato dextrose agar (PDA) at 24 °C. The symptoms and signs of the disease internally in the stem showed up at 7 days after inoculation (DAI); however, chlorosis and wilting were observed only at 14 DAI. Sexual and asexual reproductive structures of R. bunodes were not observed on inoculated plants.

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Section: Discussionmentioning

confidence: 99%

“…. However, since 2010, the appearance of root rot with the presence of dense mycelial growth, chlorosis and widespread wilt of leaves has been observed, followed by death of trees in poplar plantations in the state of Paraná, caused by Rosellinia root rot (Rosellinia bunodes) (Santos et al, 2017).…”

Section: Introductionmentioning

confidence: 99%

PHYSIOLOGICAL CHARACTERIZATION OF Rosellinia bunodes AND SYMPTOMATOLOGY OF Rosellinia ROOT ROT IN POPLAR SEEDLINGS

et al. 2018

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“…Phytopathogenic fungi of the genus Rosellinia are responsible for considerable damage in many cultivated species, especially perennial tree species such as cocoa, coffee and rubber trees (SIVANESAN;HOLLIDAY, 1972). The main symptoms of Rosellinia in poplar are the yellowing and wilting of leaves, the drying of branches and the premature plants death (SANTOS et al, 2017), which occurs as a consequence of the involvement of the entire root system by the fungus colonization in these areas, reducing and / or impairing the sap flow to shoots. Since it is relatively new pathosystem in the country, there are no studies regarding the aggressiveness of Brazilian R. bunodes isolates in poplar.…”

Section: Introductionmentioning

confidence: 99%

AGRESSIVENESS AND BIOCONTROL OF Rosellinia bunodes IN POPLAR

Kleina

Santos

Duarte

et al. 2019

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The Rosellinia root rot, caused by the fungus Rosellinia bunodes, has gained prominence due to the incidence in commercial plantations of forest species, such as poplar. Due to the absence of phytosanitary products registered for this crop in Brazil, cultural control, often inefficient, becomes the only option for the control of this disease. In the search for solutions to this problem, biological control meets the needs of implementing a more sustainable system. The objective of this work was to evaluate the aggressiveness of R. bunodes isolates in poplar and the antagonistic capacity in vitro and in vivo of Trichoderma spp. in control of this phytopathogen. For the aggressiveness test, healthy poplar seedlings were planted on substrate inoculated with nine R. bunodes isolates. The tests of antagonism in direct confrontation, production of volatile and non-volatile compounds were performed among 30 isolates of Trichoderma spp. and R. bunodes isolate R2. In the in vivo test, the treatments consisted of different planting dates of the seedlings infested with the antagonist fungus and the phytopathogen. R. bunodes isolates R2, R3, R3A, R6 and R8 were more aggressive than the others. From 30 isolates of Trichoderma spp., 12 may be considered as potential biocontrol agents due to the high competitive capacity and suppression of mycelial growth of R. bunodes. The longer exposure time between the pathogen and the antagonist on the substrate decreased the incidence of Rosellinia root rot in poplar.

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One stop shop III: taxonomic update with molecular phylogeny for important phytopathogenic genera: 51–75 (2019)

et al. 2019

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First Report of Root Rot caused by Rosellinia bunodes on a Poplar Species (Populus deltoides) in Brazil

Cited by 5 publications

References 2 publications

PHYSIOLOGICAL CHARACTERIZATION OF Rosellinia bunodes AND SYMPTOMATOLOGY OF Rosellinia ROOT ROT IN POPLAR SEEDLINGS

PHYSIOLOGICAL CHARACTERIZATION OF Rosellinia bunodes AND SYMPTOMATOLOGY OF Rosellinia ROOT ROT IN POPLAR SEEDLINGS

AGRESSIVENESS AND BIOCONTROL OF Rosellinia bunodes IN POPLAR

One stop shop III: taxonomic update with molecular phylogeny for important phytopathogenic genera: 51–75 (2019)

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