Impacts of leafroll‐associated viruses (<scp>GLRaV</scp>‐1 and ‐3) on the physiology of the <scp>P</scp>ortuguese grapevine cultivar ‘<scp>T</scp>ouriga <scp>N</scp>acional’ growing under field conditions

Moutinho-Pereira, José; Correia, Carlos M.; Gonçalves, Berta; Bacelar, Eunice; Coutinho, João; Ferreira, Helena; Lousada, J.; Cortez, Isabel

doi:10.1111/j.1744-7348.2012.00536.x

Cited by 52 publications

(40 citation statements)

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“…In agreement with these Chl a results, CCI measurements indicated a significant reduction of chlorophyll content in leaves from grapevines of the cover crop treatments. This suggests that leaf photosynthetic composition is sensitive to the competition exerted by cover crops, as it is for other stresses (Moutinho-Pereira et al, 2012), confirming that this index may be useful for ecophysiological studies (van den Berg & Perkins, 2004).…”

Section: Discussionmentioning

confidence: 58%

“…Chlorophyll a (Chl a) fluorescence attributes were measured in situ with a pulse-amplitude-modulated fluorometer (FMS 2, Hansatech Instruments, Norfolk, UK) as described by Moutinho-Pereira et al (2012), on the same leaves where stomatal conductance was measured. Leaves were dark-adapted for at least 10 minutes using dark-adapting leaf-clips.…”

Section: Experimental Designmentioning

confidence: 99%

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Influence of cover crop treatments on the performance of a vineyard in a humid region

Trigo-Córdoba¹,

Bouzas-Cid²,

Orriols-Fernández³

et al. 2015

Span. j. agric. res.

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Vineyards are usually managed by tilling the inter-rows to avoid competition from other plants for soil water and nutrients. However, in humid and sub-humid climates, such as that of NW Spain, cover crops may be an advantage for controlling vine vegetative growth and improving berry composition, while reducing management costs. The current study was conducted over three consecutive growing seasons (2012)(2013)(2014) to assess the effects of establishing three permanent cover crop treatments on water relations, vine physiology, yield and berry composition of a vineyard of the red cultivar 'Mencía' (Vitis vinifera L.) located in Leiro, Ourense. Treatments consisted of four different soil management systems: ST, soil tillage; NV, native vegetation; ER, English ryegrass (Lolium perenne L.); and SC, subterranean clover (Trifolium subterraneum L.). Midday stem water potential was more negative in the native vegetation treatment, causing significant reductions in leaf stomatal conductance on certain dates. Total vine leaf area and pruning weight was reduced in the cover crop treatments in the last year of the experiment. Yield was unaffected by the presence of a cover crop. No significant differences among treatments were observed for berry composition; however, wines were positively affected by the SC treatment (higher tannin content and colour intensity and lower malic acid concentration when compared with ST). Wines from the cover crop treatments were preferred by taste panelists. These results indicate that in humid climates cover crop treatments can be useful for reducing vine vegetative growth without compromising yield and berry quality.Additional key words: berry composition; cover crops; Mencía grapevine; tillage; sustainability; wine composition.

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Section: Discussionmentioning

confidence: 58%

Section: Experimental Designmentioning

confidence: 99%

Influence of cover crop treatments on the performance of a vineyard in a humid region

Trigo-Córdoba¹,

Bouzas-Cid²,

Orriols-Fernández³

et al. 2015

Span. j. agric. res.

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show abstract

“…Chlorophyll a (Chl a) fluorescence parameters were measured in situ with a pulse-amplitude-modulated fluorometer (FMS 2, Hansatech Instruments, Norfolk, UK) as described by Moutinho-Pereira et al (2012), on the same leaves where stomatal conductance was measured. Leaves were dark-adapted for at least 30 minutes using dark-adapting leaf-clips.…”

Section: Chlorophyll a Measurementsmentioning

confidence: 99%

Effects of surface and subsurface drip irrigation on physiology and yield of ‘Godello’ grapevines grown in Galicia, NW Spain

Mirás-Avalos¹,

Beiro

Trigo-Córdoba

et al. 2017

Ciência Téc. Vitiv.

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SUMMARYIrrigation has been considered a controversial practice in European traditional viticulture due to potential alterations in the balance between vegetative growth and yield. In this regard, the influence of surface (DI) and subsurface (SDI) drip irrigation on physiological performance of the 'Godello' grapevine (Vitis vinifera L.) cultivar was compared with a non-irrigated control (R) over three consecutive growing seasons (2012)(2013)(2014) in NW Spain. Irrigation improved vine water status; R plants reached a minimum of midday leaf water potential of -1.5 MPa, whereas DI and SDI plants reached -1.3 MPa. Stomatal conductance was unaffected by irrigation as well as chlorophyll a fluorescence. However, photosynthetic pigments were present at higher concentrations in leaves from irrigated plants than in those from R plants in 2013. In addition, R plants showed higher values for the indicators of oxidative damage. No significant yield improvements were observed for irrigated plants, although the trend was to obtain slightly higher yields under irrigation in years with low rainfall amounts. This may not encourage growers to establish irrigation systems on their vineyards. However, these results may be important with the objectives of stabilizing yield from year to year. RESUMOA rega tem sido considerada uma prática controversa na viticultura tradicional Europeia devido a potenciais alterações no equilíbrio entre crescimento vegetativo e rendimento. A este respeito, a influência da irrigação por gotejamento superficial (DI) e subsuperficial (SDI) sobre o desempenho fisiológico da variedade 'Godello' (Vitis vinifera L.) foi comparada com uma testemunha em condições de sequeiro (R) ao longo de três anos consecutivos (2012-2014) no noroeste de Espanha. A rega melhorou o estado hídrico da videira; as plantas do tratamento R atingiram potenciais hídricos foliares ao meio-dia de -1.5 MPa, comparativamente a um valor de -1.3 MPa para as plantas dos tratamentos DI e SDI. A conductância estomática e a fluorescência da clorofila a não foram afectadas pela rega. No entanto, os pigmentos fotossintéticos apresentaram maiores concentrações em folhas de plantas regadas quando se comparam com as plantas do tratamento R em 2013. Além disso, as plantas do tratamento R apresentaram valores superiores para os indicadores de danos oxidativos. Não foi detectado nenhum incremento do rendimento nas plantas regadas, embora se tenha observado uma tendência para obtenção de rendimentos ligeiramente mais elevados sob rega em anos com baixa pluviosidade. Tal poderá não encorajar aos viticultores a implementar sistemas de rega nas suas vinhas. No entanto, estes resultados podem ser importantes para a estabilização do rendimento de ano para ano.

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“…En las plantas, ocasiona reducción en: superficie foliar, clorofila y capacidad fotosintética. [2,3].…”

Section: Introducción Y Antecedentesunclassified

Influencia del virus GLRV en la composición polifenólica de vinos de Vitis vinífera cv. Bonarda en Mendoza, Argentina

Germano¹,

Cobos

Malovini

et al. 2014

37th World Congress of Vine and Wine and 12th General Assembly of the OIV

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Resumen. El Virus Grape Leaf Roll Virus (GLRV) afecta la Vid. Disminuye la superficie foliar, clorofila, y capacidad fotosintética, ocasionando disminuciones de hasta un 70% en la producción de uvas, retardo en la maduración, disminución del contenido de azúcares, y alteraciones en el color de las bayas. Objetivo: establecer y cuantificar la incidencia de los virus presentes en los viñedos mendocinos sobre la calidad y composición polifenólica de sus vinos. Se seleccionó la variedad Bonarda, de ciclo vegetativo largo. Hipótesis: el ataque de virus en plantas generará uvas de menor concentración de azúcares y vinos con menor graduación alcohólica, disminución en el color y modificará el perfil de antocianas. Se realizó un muestreo dirigido, seleccionando viñedos en 4 oasis productivos de Mendoza. Se seleccionaron plantas con síntomas visuales del virus GLRV, y plantas sin síntomas. Las uvas se vinificaron, en total 56 tanques, 28 son testigos y 28 provenían de plantas afectadas. Los vinos se sometieron a análisis de rutina. Se determinó el perfil antocianas por HPLC. El análisis de caracterización varietal de perfil de antocianas yácido shikimico, corroboró que el perfil no ha variado. La incidencia de GLRV tiene un claro efecto negativo en la calidad de uvas. Introducción y antecedentesLos Virus: Grape Leaf Roll Virus (GLRV) y Grape Fan Leaf Virus (GFLV), ocasionan severas enfermedades en viñedos muy difundidos en el mundo vitivinícola. En Argentina dichas enfermedades se reportaron en el año 1997 [1] y sus síntomas han sido ampliamente descriptos. El impacto que tiene Grape Leaf Roll Virus (GLRV) se produce fundamentalmente sobre el rendimiento, ocasionando disminuciones de hasta un 70% en la producción. Además, genera retardos en la maduración, disminución en el contenido de azúcares y alteraciones en el color de las bayas. En las plantas, ocasiona reducción en: superficie foliar, clorofila y capacidad fotosintética. [2, 3].Al igual que todas las enfermedades en vegetales, el desarrollo de GLRV y sus efectos en la producción, son el resultado de la interacción entre el genotipo del huésped, el genotipo del patógeno y el ambiente en que se encuentra la planta (entendiéndose por ambiente: las condiciones climáticas, de suelo, de cultivo, ocurrencia de otros estrés, etc.). De esta manera, los daños reportados son muy variables, siendo siempre más severos en variedades tintas y de ciclo tardío.Se ha descripto que la infección con Leaf Roll Virus en las variedades Riesling y Zinfandel no modifica parámetros vegetativos ni de producción, como: peso de poda y volumen de cosecha, tampoco acidez del mosto, sí modifica: porcentaje de sólidos solubles (grados brix) del mismo [4, 5]. Por otro lado, en Pinot noir, sí se observaron disminuciones significativas en el volumen de cosecha y en el porcentaje de sólidos solubles del mosto, a e-mail: d5cobos@yahoo.com.ar comparando plantas infectadas y sanas. Uno de los efectos más perjudiciales es su incidencia en la acumulación en uva de sustancias asociadas a características or...

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Impacts of leafroll‐associated viruses (GLRaV‐1 and ‐3) on the physiology of the Portuguese grapevine cultivar ‘Touriga Nacional’ growing under field conditions

Cited by 52 publications

References 50 publications

Influence of cover crop treatments on the performance of a vineyard in a humid region

Influence of cover crop treatments on the performance of a vineyard in a humid region

Effects of surface and subsurface drip irrigation on physiology and yield of ‘Godello’ grapevines grown in Galicia, NW Spain

Influencia del virus GLRV en la composición polifenólica de vinos de Vitis vinífera cv. Bonarda en Mendoza, Argentina

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