Staff View: Antagonistic process of Dicyma pulvinata against Fusicladium macrosporum on rubber tree

Antagonistic process of Dicyma pulvinata against Fusicladium macrosporum on rubber tree

The interaction between Dicyma pulvinata and Fusicladium macrosporum was studied by scanning electron microscopy. Spores of D. pulvinata germinated on the surface of F. macrosporum lesions induced on artificially infected rubber plants were fixed 8 h after inoculation. D. pulvinata germ tubes seemed...

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Main Authors:	Mello, Sueli C.M., Estevanato, Carlos Eduardo, Braúna, Leonardo M., Capdeville, Guy de, Queiroz, Paulo Roberto, Lima, Luzia Helena C.
Format:	Artigo
Language:	English
Published:	Sociedade Brasileira de Fitopatologia 2017
Subjects:	pathogen and antagonistic interaction South American Leaf Blight Hevea brasiliensis biocontrol interação patógeno e antagonista mal-das-folhas da seringueira biocontrole
Online Access:	http://repositorio.unb.br/handle/10482/27404
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spelling	ir-10482-274042019-03-28T14:09:50Z Antagonistic process of Dicyma pulvinata against Fusicladium macrosporum on rubber tree Processo de antagonismo de Dicyma pulvinata contra Fusicladium macrosporum em folhas de seringueira Mello, Sueli C.M. Estevanato, Carlos Eduardo Braúna, Leonardo M. Capdeville, Guy de Queiroz, Paulo Roberto Lima, Luzia Helena C. pathogen and antagonistic interaction South American Leaf Blight Hevea brasiliensis biocontrol interação patógeno e antagonista mal-das-folhas da seringueira Hevea brasiliensis biocontrole The interaction between Dicyma pulvinata and Fusicladium macrosporum was studied by scanning electron microscopy. Spores of D. pulvinata germinated on the surface of F. macrosporum lesions induced on artificially infected rubber plants were fixed 8 h after inoculation. D. pulvinata germ tubes seemed to elongate toward F. macrosporum. Close contact between the antagonistic fungus and F. macrosporum spores was verified 24 h after application of D. pulvinata. At the end of the process, spores of F. macrosporum seemed to have disintegrated and to be devoid of content. The hyperparasite grew completely over the pathogen. Six to seven days after application of the antagonistic fungus, D. pulvinata conidiophores were observed emerging from F. macrosporum structures with profuse sporulation. Studies have also shown the possibility of D. pulvinata producing hydrolytic enzymes, which could be associated with the control of plant pathogens. This information may help to elucidate some of the modes of action of D. pulvinata, a potential biological control agent for South American leaf blight of Hevea rubber plant. Estudou-se a interação entre Dicyma pulvinata e F. macrosporum ao microscópio eletrônico de varredura. Esporos de D. pulvinata germinaram na superfície das lesões induzidas por F. macrosporum em plantas de seringueira (Hevea brasiliensis), infectadas artificialmente, fixadas 8 h após a inoculação do antagonista. Aparentemente, os tubos germinativos se alongaram em direção ao patógeno. O contato íntimo entre o hiperparasita e o patógeno foi verificado em amostras fixadas 24 h após a aplicação de D. pulvinata. Ao término do processo, os esporos de F. macrosporum aparentemente invadidos pelo antagonista mostraram-se desintegrados e esvaziados de seu conteúdo. D. pulvinata cresceu sobre as lesões, sobrepondo totalmente o patógeno. Seis dias após a aplicação, conidióforos do fungo antagonista foram observados emergindo das estruturas do patógeno, produzindo esporos em grande quantidade. Verificou-se, também, um possível envolvimento de enzimas hidrolíticas na associação antagonística entre D. pulvinata e o patógeno. Estas informações podem contribuir para elucidar o modo de ação de D. pulvinata, um potencial agente de controle biológico para o mal das folhas da seringueira. 2017-12-07T04:51:06Z 2017-12-07T04:51:06Z 2008 Artigo Trop. plant pathol.,v.33,n.1,p.5-11,2008 1982-5676 http://repositorio.unb.br/handle/10482/27404 10.1590/S1982-56762008000100002 en Acesso Aberto application/pdf Sociedade Brasileira de Fitopatologia http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1982-56762008000100002&lng=en&nrm=iso http://www.scielo.br/scielo.php?script=sci_abstract&pid=S1982-56762008000100002&lng=en&nrm=iso http://www.scielo.br/scielo.php?script=sci_pdf&pid=S1982-56762008000100002&lng=en&nrm=iso
institution	REPOSITORIO UNB
collection	REPOSITORIO UNB
language	English
topic	pathogen and antagonistic interaction South American Leaf Blight Hevea brasiliensis biocontrol interação patógeno e antagonista mal-das-folhas da seringueira Hevea brasiliensis biocontrole
spellingShingle	pathogen and antagonistic interaction South American Leaf Blight Hevea brasiliensis biocontrol interação patógeno e antagonista mal-das-folhas da seringueira Hevea brasiliensis biocontrole Mello, Sueli C.M. Estevanato, Carlos Eduardo Braúna, Leonardo M. Capdeville, Guy de Queiroz, Paulo Roberto Lima, Luzia Helena C. Antagonistic process of Dicyma pulvinata against Fusicladium macrosporum on rubber tree
description	The interaction between Dicyma pulvinata and Fusicladium macrosporum was studied by scanning electron microscopy. Spores of D. pulvinata germinated on the surface of F. macrosporum lesions induced on artificially infected rubber plants were fixed 8 h after inoculation. D. pulvinata germ tubes seemed to elongate toward F. macrosporum. Close contact between the antagonistic fungus and F. macrosporum spores was verified 24 h after application of D. pulvinata. At the end of the process, spores of F. macrosporum seemed to have disintegrated and to be devoid of content. The hyperparasite grew completely over the pathogen. Six to seven days after application of the antagonistic fungus, D. pulvinata conidiophores were observed emerging from F. macrosporum structures with profuse sporulation. Studies have also shown the possibility of D. pulvinata producing hydrolytic enzymes, which could be associated with the control of plant pathogens. This information may help to elucidate some of the modes of action of D. pulvinata, a potential biological control agent for South American leaf blight of Hevea rubber plant.
format	Artigo
author	Mello, Sueli C.M. Estevanato, Carlos Eduardo Braúna, Leonardo M. Capdeville, Guy de Queiroz, Paulo Roberto Lima, Luzia Helena C.
author_sort	Mello, Sueli C.M.
title	Antagonistic process of Dicyma pulvinata against Fusicladium macrosporum on rubber tree
title_short	Antagonistic process of Dicyma pulvinata against Fusicladium macrosporum on rubber tree
title_full	Antagonistic process of Dicyma pulvinata against Fusicladium macrosporum on rubber tree
title_fullStr	Antagonistic process of Dicyma pulvinata against Fusicladium macrosporum on rubber tree
title_full_unstemmed	Antagonistic process of Dicyma pulvinata against Fusicladium macrosporum on rubber tree
title_sort	antagonistic process of dicyma pulvinata against fusicladium macrosporum on rubber tree
publisher	Sociedade Brasileira de Fitopatologia
publishDate	2017
url	http://repositorio.unb.br/handle/10482/27404
_version_	1641988785262559232
score	13.657419

Antagonistic process of Dicyma pulvinata against Fusicladium macrosporum on rubber tree

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