Strains of Neopestalotiopsis sp. are in vitro antagonists of Cryphonectria parasitica

González, Ana J.; Trapiello, Estefanía

doi:10.1016/j.biocontrol.2020.104187

Cited by 3 publications

(2 citation statements)

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“…Therefore, entries in Table 1 referring to this study must be taken with circumspection. Moreover, some uncertainty is entailed in a few reports concerning endophytic fungi associated with cankers produced by C. parasitica on both C. sativa and C. dentata [ 31 , 32 , 33 , 34 , 35 , 36 ]. Even if in these cases the plant material used for isolations was not asymptomatic following infection by a known pathogen, the sterilization procedure ensured that at least the isolated fungi had colonized the plant tissues before sampling and were not epiphytic contaminants.…”

Section: Occurrence Of Endophytic Fungi In Chestnuts and Ecologicamentioning

confidence: 99%

“…Finally, in other studies the evaluation of antagonistic properties against C. parasitica has been limited to in vitro assays; effectiveness at some extent was observed for strains of Pezicula cinnamomea [ 28 ], Trichoderma spp., Penicillium sp., Gnomoniopsis sp., E. nigrum and Umbelopsis isabellina [ 61 ], Penicillium spp. [ 34 ] and Neopestalotiopsis zimbabwana [ 35 ].…”

Section: Occurrence Of Endophytic Fungi In Chestnuts and Ecologicamentioning

confidence: 99%

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Endophytic Fungi and Ecological Fitness of Chestnuts

Nicoletti

Beccaro

Sękara

et al. 2021

Plants

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Chestnuts (Castanea spp.) are plants of relevant economic interest in the agro-sylvicultural contexts of mountain regions throughout the temperate zone, particularly in the northern hemisphere. In recent years, several biological adversities have repeatedly endangered species belonging to this genus, calling for coordinated actions addressed to contrast their decline. These actions have mainly focused on the control of key pests/pathogens and the improvement of resistance/tolerance by the plant host, while the role of microorganisms as mediators of interactions between plants and the noxious agents has been less considered, essentially by reason of a limited knowledge on their ecological impact. In line with the increasing awareness of the basic importance of microbial symbionts in regulating plant fitness in both natural and crop contexts, this paper offers an overview on the occurrence and effects of endophytic fungi of chestnuts.

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Section: Occurrence Of Endophytic Fungi In Chestnuts and Ecologicamentioning

confidence: 99%

Section: Occurrence Of Endophytic Fungi In Chestnuts and Ecologicamentioning

confidence: 99%

Endophytic Fungi and Ecological Fitness of Chestnuts

Nicoletti

Beccaro

Sękara

et al. 2021

Plants

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Short and long term efficacy and prevalence of Cryphonectria parasitica hypovirulent strains released as biocontrol agents of chestnut blight

2021

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Chestnut blight, Cryphonectria parasitica (Murrill) Barr, was reported in Portugal in 1989. The disease rapidly spread within the chestnut region of the Trás-os-Montes (the Northeast of Portugal). Eradication and mechanical/burning exclusion failed to control the disease and natural hypovirulence is still absent or of very low incidence. The introduction of human-assisted therapeutic hypovirulence is therefore required to control the disease. We presente here the efficacy of field applications (short and long term) of a locally characterized hypovirulent strain (CHV1-RBB111), by the punch method in two chestnut orchards (Valpaços and Vinhais). The Valpaços disease incidence was 68% (65 out of 96 trees) and in Vinhais it was 46% (78 out of 169 trees). In both locations, diversity of vegetative incompatibility (vc type) was low and largely dominated (> 85%) by a single vc type (EU11). In Valpaços, all cankers of the orchard were treated (63 cankers) and in Vinhais 31 trees (cankers) were treated. One year after application, field efficacy was very high with 93.8% of healed cankers in Valpaços and 90.3% in Vinhais, these values increased to 100% and 93.5% (respectively) after four years. The persistence of the introduced CHV1-RBB 111 strain was high and present in almost all treated cankers and it was dominant both inwards and on the application site revealing an endophytic behavior. The non-C. parasitica microfungi were abundant with 14 different species. Biscogniauxia mediterranea (De Not.) Kuntze was the most abundant in both orchards. Treatment with the introduced hypovirulent strain (CHV1-RBB111) was found to be effective in controlling chestnut blight with regeneration of cortical tissues and recovery of treated trees.

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