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Statements

Subject Item
n2:RIV%2F61989592%3A15310%2F13%3A33146843%21RIV14-MSM-15310___
rdf:type
skos:Concept n4:Vysledek
rdfs:seeAlso
http://jxb.oxfordjournals.org/content/64/8/2219
dcterms:description
Recent studies suggest that plant pectin methylesterases (PMEs) are directly involved in plant defence besides their roles in plant development. However, the molecular mechanisms of PME action on pectins are not well understood. In order to understand how PMEs modify pectins during banana (Musa spp.)Fusarium interaction, the expression and enzyme activities of PMEs in two banana cultivars, highly resistant or susceptible to Fusarium, were compared with each other. Furthermore, the spatial distribution of PMEs and their effect on pectin methylesterification of 10 individual homogalacturonan (HG) epitopes with different degrees of methylesterification (DMs) were also examined. The results showed that, before pathogen treatment, the resistant cultivar displayed higher PME activity than the susceptible cultivar, corresponding well to the lower level of pectin DM. A significant increase in PME expression and activity and a decrease in pectin DM were observed in the susceptible cultivar but not in the resistant cultivar when plants were wounded, which was necessary for successful infection. With the increase of PME in the wounded susceptible cultivar, the JIM5 antigen (low methyestrified HGs) increased. Forty-eight hours after pathogen infection, the PME activity and expression in the susceptible cultivar were higher than those in the resistant cultivar, while the DM was lower. In conclusion, the resistant and the susceptible cultivars differ significantly in their response to wounding. Increased PMEs and thereafter decreased DMs acompanied by increased low methylesterified HGs in the root vascular cylinder appear to play a key role in determination of banana susceptibility to Fusarium. Recent studies suggest that plant pectin methylesterases (PMEs) are directly involved in plant defence besides their roles in plant development. However, the molecular mechanisms of PME action on pectins are not well understood. In order to understand how PMEs modify pectins during banana (Musa spp.)Fusarium interaction, the expression and enzyme activities of PMEs in two banana cultivars, highly resistant or susceptible to Fusarium, were compared with each other. Furthermore, the spatial distribution of PMEs and their effect on pectin methylesterification of 10 individual homogalacturonan (HG) epitopes with different degrees of methylesterification (DMs) were also examined. The results showed that, before pathogen treatment, the resistant cultivar displayed higher PME activity than the susceptible cultivar, corresponding well to the lower level of pectin DM. A significant increase in PME expression and activity and a decrease in pectin DM were observed in the susceptible cultivar but not in the resistant cultivar when plants were wounded, which was necessary for successful infection. With the increase of PME in the wounded susceptible cultivar, the JIM5 antigen (low methyestrified HGs) increased. Forty-eight hours after pathogen infection, the PME activity and expression in the susceptible cultivar were higher than those in the resistant cultivar, while the DM was lower. In conclusion, the resistant and the susceptible cultivars differ significantly in their response to wounding. Increased PMEs and thereafter decreased DMs acompanied by increased low methylesterified HGs in the root vascular cylinder appear to play a key role in determination of banana susceptibility to Fusarium.
dcterms:title
Wound-induced pectin methylesterases enhance banana (Musa spp. AAA) susceptibility to Fusarium oxysporum f. sp cubense Wound-induced pectin methylesterases enhance banana (Musa spp. AAA) susceptibility to Fusarium oxysporum f. sp cubense
skos:prefLabel
Wound-induced pectin methylesterases enhance banana (Musa spp. AAA) susceptibility to Fusarium oxysporum f. sp cubense Wound-induced pectin methylesterases enhance banana (Musa spp. AAA) susceptibility to Fusarium oxysporum f. sp cubense
skos:notation
RIV/61989592:15310/13:33146843!RIV14-MSM-15310___
n4:predkladatel
n5:orjk%3A15310
n3:aktivita
n16:P
n3:aktivity
P(ED0007/01/01)
n3:cisloPeriodika
8
n3:dodaniDat
n9:2014
n3:domaciTvurceVysledku
n15:4786076 n15:7346948
n3:druhVysledku
n17:J
n3:duvernostUdaju
n21:S
n3:entitaPredkladatele
n18:predkladatel
n3:idSjednocenehoVysledku
117526
n3:idVysledku
RIV/61989592:15310/13:33146843
n3:jazykVysledku
n13:eng
n3:klicovaSlova
plants; fungus; infection; tolerance; expression; disease resistance; pathogen interactions; methyl esterification; cell-walls; Botrytis-cinerea
n3:klicoveSlovo
n6:tolerance n6:Botrytis-cinerea n6:infection n6:disease%20resistance n6:pathogen%20interactions n6:expression n6:cell-walls n6:fungus n6:plants n6:methyl%20esterification
n3:kodStatuVydavatele
GB - Spojené království Velké Británie a Severního Irska
n3:kontrolniKodProRIV
[E8AD91D9DED2]
n3:nazevZdroje
Journal of Experimenal Botany
n3:obor
n20:EB
n3:pocetDomacichTvurcuVysledku
2
n3:pocetTvurcuVysledku
11
n3:projekt
n8:ED0007%2F01%2F01
n3:rokUplatneniVysledku
n9:2013
n3:svazekPeriodika
64
n3:tvurceVysledku
Takáč, Tomáš Šamaj, Jozef Jiang, Shuang Ma, Li Lin, Guimei
n3:wos
000319433200009
s:issn
0022-0957
s:numberOfPages
11
n11:doi
10.1093/jxb/ert088
n12:organizacniJednotka
15310