http://www.cnr.it/ontology/cnr/individuo/prodotto/ID248809

Flavescence dorée phytoplasma deregulates stomatal control of photosynthesis in Vitis vinifera (Articolo in rivista)

Type

Articolo in rivista (Classe)
Prodotto della ricerca (Classe)

Label

Flavescence dorée phytoplasma deregulates stomatal control of photosynthesis in Vitis vinifera (Articolo in rivista) (literal)

Anno

2013-01-01T00:00:00+01:00 (literal)

Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#doi

10.1111/aab.12025 (literal)

Alternative label

Vitali M., Chitarra W., Galetto L., Bosco D., Marzachi C., Gullino M.L., Spanna F., Lovisolo C. (2013)
Flavescence dorée phytoplasma deregulates stomatal control of photosynthesis in Vitis vinifera
in Annals of applied biology (Online); Wiley-Blackwell, Oxford (Regno Unito)
(literal)

Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori

Vitali M., Chitarra W., Galetto L., Bosco D., Marzachi C., Gullino M.L., Spanna F., Lovisolo C. (literal)

Pagina inizio

335 (literal)

Pagina fine

346 (literal)

Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#numeroVolume

162 (literal)

Rivista

Annals of applied biology (Rivista)

Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#pagineTotali

12 (literal)

Note

ISI Web of Science (WOS) (literal)

Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#affiliazioni

VM, CW,, GL,LC: Department of Agricultural, Forest and Food Sciences (DISAFA), University of Torino, Grugliasco, Italy GL, BD, MC, LC: CNR - Istituto Di Virologia Vegetale BD: Universita` degli Studi di Torino, DISAFA, Grugliasco, Italy GML: Centre of Competence in the Agro-Environmental Sector (AGROINNOVA), University of Torino, Grugliasco, Italy SF: Piedmont Region, Phytosanitary Service, Agrometeorology Sector, Torino, Italy (literal)

Titolo

Flavescence dorée phytoplasma deregulates stomatal control of photosynthesis in Vitis vinifera (literal)

Abstract

Flavescence dorée (FD) is among the major grapevine diseases causing highmanagement costs; curative methods against FD are unavailable. In FD-infected plants, decrease in photosynthesis is usually recorded, but deregulation in stomatal control of leaf gas exchange during FD infection and recovery is unknown. We measured the seasonal time course of gas exchange rates in two cultivars ('Barbera' and 'Nebbiolo') during the term of 1 year when grapevines experienced a water stress and another with no drought, with difference in gas exchange rates in response to FD infection and recovery as assessed by symptom observation and phytoplasma detection through PCR analysis. Chlorophyll fluorescence was also evaluated at the time of maximum symptom severity in 'Barbera', the cultivar showing the most severe stress response to FD infection, causing the highest damage in vineyards of north-western Italy. In FD-infected plants, net photosynthesis and transpiration gradually decreased during the season, more during the no drought year than during drought. During recovery, healthy (PCR negative) plants infected 2 years before, but not those infected an year before, regained the gas exchange performances to the level as measured before infection. The relationships between stomatal conductance and the residual leaf intercellular CO2 concentration (ci) discriminated healthy versus FD-infected and recovered plants; at the same ci, FD-infected leaves had higher non-photochemical quenching than healthy ones. We conclude that metabolic, not stomatal, leaf gas exchange limitation in FD-infected and recovered grapevines is the basis of plant response to FD disease. In addition,we also suggest that such response is dependent upon water stress, by showing that water stress superimposes on FD infection in terms of stomatal and metabolic non-stomatal limitations to carbon assimilation. (literal)

Editore