High Temperature and Photosynthesis in Orange Plants Infected with X. Fastidiosa
نویسندگان
چکیده
1Departamento de Ciências Biológicas, Escola Superior de Agricultura “Luiz de Queiroz”, Universidade de São Paulo, Av. Pádua Dias, 11, CP 09, 13418-900, Piracicaba, SP, Brazil. 2Centro de Ecofisiologia e Biofísica, Instituto Agronômico de Campinas, CP 28, 13001-970, Campinas, SP, Brazil. 3Instituto de Agronomia, Departamento de Fitotecnia, Universidade Federal Rural do Rio de Janeiro, 28851-970, Itaguaí, RJ, Brazil. *Corresponding author: [email protected]. Received: 28/01/2003, Accepted: 25/04/2003
منابع مشابه
Presence of Xylella fastidiosa in Sweet Orange Fruit and Seeds and Its Transmission to Seedlings.
ABSTRACT Xylella fastidiosa, a xylem-limited bacterium, causes several economically important diseases in North, Central, and South America. These diseases are transmitted by sharpshooter insects, contaminated budwood, and natural root-grafts. X. fastidiosa extensively colonizes the xylem vessels of susceptible plants. Citrus fruit have a well-developed vascular system, which is continuous with...
متن کاملInteractions of Xylella fastidiosa and Endophytic Bacteria in Citrus: A Review
Citrus variegated chlorosis (CVC) is a disease of sweet orange [Citrus sinensis (L.)] caused by Xylella fastidiosa subsp. pauca, a phytopathogenic bacterium that has been shown to infect all sweet orange cultivars. Xylella fastidiosa is a fastidious Gram-negative, xylem-limited bacterium which was rapidly disseminated by infected nursery trees and by several xylem-feeding sharpshooter insect ve...
متن کاملPhotosynthetic Responses of a Temperate Liana to Xylella fastidiosa Infection and Water Stress
Xylella fastidiosa is a xylem-limited bacterial plant pathogen that causes bacterial leaf scorch in its hosts. Our previous work showed that water stress enhances leaf scorch symptom severity and progression along the stem of a liana, Parthenocissus quinquefolia, infected by X. fastidiosa. This paper explores the photosynthetic gas exchange responses of P. quinquefolia, with the aim to elucidat...
متن کاملPhotosynthetic and Water Relations in Orange Plants with Cvc
Plants with citrus variegated chlorosis (CVC), a disease caused by the xylem-limited bacteria Xylella fastidiosa, have leaves with water deficiency symptoms and are associated with decreases on the net photosynthesis and transpiration rates. Using healthy and CVC-affected ‘Pêra’ sweet orange plants on ‘Rangpur’ lime rootstock, the leaf gas exchange variables were measured with an open-gas porta...
متن کاملRapid, specific and quantitative assays for the detection of the endophytic bacterium Methylobacterium mesophilicum in plants.
Xylella fastidiosa is a xylem-limited bacterium that causes citrus variegated chlorosis disease in sweet orange. There is evidence that X. fastidiosa interacts with endophytic bacteria present in the xylem of sweet orange, and that these interactions, particularly with Methylobacterium mesophilicum, may affect disease progress. However, these interactions cannot be evaluated in detail until eff...
متن کامل