Please use this identifier to cite or link to this item: http://www.alice.cnptia.embrapa.br/alice/handle/doc/1134154
Research center of Embrapa/Collection: Embrapa Pesca e Aquicultura - Artigo em periódico indexado (ALICE)
Date Issued: 2021
Type of Material: Artigo em periódico indexado (ALICE)
Authors: 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
Additional Information: LEONARDO JOSE MOTTA CAMPOS, CNPSO; RODRIGO ESTEVAM MUNHOZ DE ALMEIDA, CNPASA; DAGMA DIONISIA DA SILVA, CNPMS; LUCIANO VIANA COTA, CNPMS; ALESSANDRA MARIA LIMA NAOE, UNIVERSIDADE FEDERAL DO TOCANTINS; JOÊNES MUCCI PELUZIO, UNIVERSIDADE FEDERAL DO TOCANTINS; FERNANDA PINHEIRO BERNARDES, FACULDADE CATÓLICA DO TOCANTINS; RODRIGO VERAS DA COSTA, CNPMS.
Title: Physiological and biophysical alterations in maize plants caused by Colletotrichum graminicola infection verifed by OJIP study.
Publisher: Tropical Plant Pathology, 2021.
Language: Ingles
Notes: First online.
Keywords: Fuorescência da clorofila
Fotossistema
Description: 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.
Thesagro: Doença de Planta
Antracnose
Produtividade
Milho
Colletotrichum Graminicola
NAL Thesaurus: Anthracnose
Chlorophyll
Corn
Photosystem II
Data Created: 2021-09-09
ISSN: 1983-2052
Appears in Collections:Artigo em periódico indexado (CNPASA)

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