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Statements

Subject Item
n2:RIV%2F67179843%3A_____%2F12%3A00426673%21RIV14-MSM-67179843
rdf:type
skos:Concept n6:Vysledek
dcterms:description
Response of grapevine leaf tissue naturally infected by Plasmopara viticola in fi eld was measured by means of chlorophyll fl uorescence and refl ectance signals. Three susceptible grapevine varieties (Cabernet Sauvignon, Pinot Blanc and Pinot Gris) were used in this study. Since the infection impairs photosynthetic activity, distribution of FV/FM parameter (maximum quantum yield of Photosystem II) over the leaf was eff ective to discriminate healthy and naturally infected leaf tissue. FV/FM was reduced 25% in all infected leaf parts. Infected leaf spots expressed signifi cantly altered chlorophyll fl uorescence induction kinetics expressing much slower electron transport rate both on donor and acceptor site of PSII. Vegetation refl ectance indices followed the variations in pigment content a er the fungal infection. R750/R700 (R2 = 0.877) and CRI (carotenoid refl ectance index; R2 = 0.735) were the most potent to follow changes in chlorophylls and carotenoids contents, respectively. Infected leaf tissue exhibited decrease in chlorophyll a (50 %) as well as carotenoids (70%). We conclude that combination of chlorophyll fl uorescence and refl ectance measurements can be used as an eff ective non-invasive tool for an early detection of Plasmopara viticola in fi eld as well as for estimation of the level of infection. Response of grapevine leaf tissue naturally infected by Plasmopara viticola in fi eld was measured by means of chlorophyll fl uorescence and refl ectance signals. Three susceptible grapevine varieties (Cabernet Sauvignon, Pinot Blanc and Pinot Gris) were used in this study. Since the infection impairs photosynthetic activity, distribution of FV/FM parameter (maximum quantum yield of Photosystem II) over the leaf was eff ective to discriminate healthy and naturally infected leaf tissue. FV/FM was reduced 25% in all infected leaf parts. Infected leaf spots expressed signifi cantly altered chlorophyll fl uorescence induction kinetics expressing much slower electron transport rate both on donor and acceptor site of PSII. Vegetation refl ectance indices followed the variations in pigment content a er the fungal infection. R750/R700 (R2 = 0.877) and CRI (carotenoid refl ectance index; R2 = 0.735) were the most potent to follow changes in chlorophylls and carotenoids contents, respectively. Infected leaf tissue exhibited decrease in chlorophyll a (50 %) as well as carotenoids (70%). We conclude that combination of chlorophyll fl uorescence and refl ectance measurements can be used as an eff ective non-invasive tool for an early detection of Plasmopara viticola in fi eld as well as for estimation of the level of infection.
dcterms:title
Response of grapevine leaves to plasmopara viticola infection by means of measurement of reflectance and fluorescence signals Response of grapevine leaves to plasmopara viticola infection by means of measurement of reflectance and fluorescence signals
skos:prefLabel
Response of grapevine leaves to plasmopara viticola infection by means of measurement of reflectance and fluorescence signals Response of grapevine leaves to plasmopara viticola infection by means of measurement of reflectance and fluorescence signals
skos:notation
RIV/67179843:_____/12:00426673!RIV14-MSM-67179843
n6:predkladatel
n7:ico%3A67179843
n3:aktivita
n17:P n17:I
n3:aktivity
I, P(ED1.1.00/02.0073), P(GA522/09/1565)
n3:cisloPeriodika
8
n3:dodaniDat
n13:2014
n3:domaciTvurceVysledku
n14:3114724 n14:1163906
n3:druhVysledku
n18:J
n3:duvernostUdaju
n15:S
n3:entitaPredkladatele
n10:predkladatel
n3:idSjednocenehoVysledku
165262
n3:idVysledku
RIV/67179843:_____/12:00426673
n3:jazykVysledku
n5:eng
n3:klicovaSlova
Plasmopara viticola; downy mildew; grapevine; leaf tissue; susceptible varieties; chlorophyll fluorescence imaging; reflectance
n3:klicoveSlovo
n9:Plasmopara%20viticola n9:susceptible%20varieties n9:downy%20mildew n9:reflectance n9:chlorophyll%20fluorescence%20imaging n9:leaf%20tissue n9:grapevine
n3:kodStatuVydavatele
CZ - Česká republika
n3:kontrolniKodProRIV
[23B801296834]
n3:nazevZdroje
Acta Universitatis Agriculturae et Silviculturae Mendelianae Brunensis
n3:obor
n16:GM
n3:pocetDomacichTvurcuVysledku
2
n3:pocetTvurcuVysledku
4
n3:projekt
n12:GA522%2F09%2F1565 n12:ED1.1.00%2F02.0073
n3:rokUplatneniVysledku
n13:2012
n3:svazekPeriodika
27
n3:tvurceVysledku
Olejníčková, Julie Šebela, David Sotolář, R. Župčanová, A.
s:issn
1211-8516
s:numberOfPages
9