Your browser doesn't support javascript.
loading
A maize polygalacturonase functions as a suppressor of programmed cell death in plants.
He, Yijian; Karre, Shailesh; Johal, Gurmukh S; Christensen, Shawn A; Balint-Kurti, Peter.
Afiliação
  • He Y; Dept. of Entomology and Plant Pathology, NC State University, Raleigh, NC, 27695-7616, USA.
  • Karre S; Dept. of Entomology and Plant Pathology, NC State University, Raleigh, NC, 27695-7616, USA.
  • Johal GS; Botany and Plant Pathology, Purdue University, West Lafayette, USA.
  • Christensen SA; Chemistry Research Unit, Center for Medical, Agricultural, and Veterinary Entomology, Department of Agriculture-Agricultural Research Service (USDA-ARS), Gainesville, FL, 32608, USA.
  • Balint-Kurti P; Dept. of Entomology and Plant Pathology, NC State University, Raleigh, NC, 27695-7616, USA. pjbalint@ncsu.edu.
BMC Plant Biol ; 19(1): 310, 2019 Jul 15.
Article em En | MEDLINE | ID: mdl-31307401
BACKGROUND: The hypersensitive defense response (HR) in plants is a fast, localized necrotic response around the point of pathogen ingress. HR is usually triggered by a pathogen recognition event mediated by a nucleotide-binding site, leucine-rich repeat (NLR) protein. The autoactive maize NLR gene Rp1-D21 confers a spontaneous HR response in the absence of pathogen recognition. Previous work identified a set of loci associated with variation in the strength of Rp1-D21-induced HR. A polygalacturonase gene homolog, here termed ZmPGH1, was identified as a possible causal gene at one of these loci on chromosome 7. RESULTS: Expression of ZmPGH1 inhibited the HR-inducing activity of both Rp1-D21 and that of another autoactive NLR, RPM1(D505V), in a Nicotiana benthamiana transient expression assay system. Overexpression of ZmPGH1 in a transposon insertion line of maize was associated with suppression of chemically-induced programmed cell death and with suppression of HR induced by Rp1-D21 in maize plants grown in the field. CONCLUSIONS: ZmPGH1 functions as a suppressor of programmed cell death induced by at least two autoactive NLR proteins and by two chemical inducers. These findings deepen our understanding of the control of the HR in plants.
Assuntos
Palavras-chave

Texto completo: 1 Base de dados: MEDLINE Assunto principal: Proteínas de Plantas / Poligalacturonase / Apoptose / Zea mays Tipo de estudo: Prognostic_studies Idioma: En Ano de publicação: 2019 Tipo de documento: Article

Texto completo: 1 Base de dados: MEDLINE Assunto principal: Proteínas de Plantas / Poligalacturonase / Apoptose / Zea mays Tipo de estudo: Prognostic_studies Idioma: En Ano de publicação: 2019 Tipo de documento: Article