Data/hora: 04/06/2024 02:08:32

Biblioteca(s): | Embrapa Milho e Sorgo; Embrapa Pesca e Aquicultura; Embrapa Soja.
Tipo da produção científica: | Artigo em Periódico Indexado
Circulação/Nível: | A - 2
Data corrente: | 09/09/2021
Data da última atualização: | 27/03/2023
Autoria: | CAMPOS, L. J. M.; ALMEIDA, R. E. M. de; SILVA, D. D. da; COTA, L. V.; NAOE, A. M. L.; PELUZIO, J. M.; BERNARDES, F. P.; COSTA, R. V. da.
Afiliação: | LEONARDO JOSE MOTTA CAMPOS, CNPSO; RODRIGO ESTEVAM MUNHOZ DE ALMEIDA, CNPASA; DAGMA DIONISIA DA SILVA, CNPMS; LUCIANO VIANA COTA, CNPMS; Universidade Federal do Tocantins, Palmas, TO 77001-090, Brazil; Universidade Federal do Tocantins, Palmas, TO 77001-090, Brazil; Faculdade Católica do Tocantins, Unidade II, Palmas, TO 77000-000, Brazil; RODRIGO VERAS DA COSTA, CNPMS.
Título: | Physiological and biophysical alterations in maize plants caused by Colletotrichum graminicola infection verified by OJIP study.
Ano de publicação: | 2021
Fonte/Imprenta: | Tropical Plant Pathology, v. 46, p. 674-683, 2021.
DOI: | 10.1007/s40858-021-00465-x
Idioma: | Inglês
Conteúdo: | Anthracnose caused by Colletotrichum graminicola (Ces.) Wils is among the most aggressive maize diseases worldwide, considerably hindering crop productivity. To investigate the responses underlying the host-pathogen interaction involved in anthracnose infection, we conducted two feld experiments in some of the main grain producing areas of the State of Tocantins, in Brazil. Four maize hybrids (with diferential tolerance to C. graminicola) were sown in February and March, 2017. Chlorophyll fuorescence measures were performed according to the OJIP protocol; additionally, SPAD readings were conducted and productivity components were assessed. Inoculation with the fungus spore suspension afected the response curve of the chlorophyll fuorescence transient, SPAD index, and productivity components. Anthracnose stalk rot caused 20-25% reduction in grain weight, 6?8% reduction in maize ear size, and 20-23% reduction in ear weight. Furthermore, plants experiencing C. graminicola rot showed reduced SPAD index and a 24-34% reduction in the activity indicator of PSII (PITotal). These changes in the photosynthetic apparatus were successfully observed via chlorophyll fuorescence measurements.
Palavras-Chave: | Fotossistema; Fuorescência da clorofila.
Thesagro: | Antracnose; Colletotrichum Graminicola; Doença de Planta; Milho; Perda da Produção; Produtividade.
Thesaurus Nal: | Anthracnose; Chlorophyll; Corn; Photosystem II.

Categoria do assunto:

F Plantas e Produtos de Origem Vegetal
H Saúde e Patologia
X Pesquisa, Tecnologia e Engenharia

URL: | http://ainfo.cnptia.embrapa.br/digital/bitstream/item/232916/1/ID-40408-Campos2021-Article-PhysiologicalAndBiophysicalAlt.pdf
Registro original: | Embrapa Soja (CNPSO)

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