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Statements

Subject Item
n2:RIV%2F00216208%3A11310%2F08%3A13184%21RIV13-MSM-11310___
rdf:type
n10:Vysledek skos:Concept
dcterms:description
Tuberization in potato represents a morphogenetic transition of stolon growth to tuber formation, which is under complex environmental and endogenous regulation. In the present work, we studied the regulatory mechanisms and the role of different morphogenetic factors in a newly isolated potato mutant, which exhibited spontaneous tuberization (ST). The ST mutant was characterized in detail at morphological, physiological and biochemical levels. Tuberization of the ST mutant grown in the soil was photoperiod-insensitive; predominantly sessile tubers formed directly from axillary buds even under continuous light. Single-node cuttings of the ST mutant cultured in vitro frequently formed tubers or basal tuber-like swellings instead of normal shoots under conditions routinely used for shoot propagation. The tuberization response of ST cuttings under light was dependent on sucrose, the concentration of which had to exceed certain threshold that inversely correlated with irradiance. Gibberellic acid prevented tuberization of ST cuttings, but failed to restore normal shoot phenotype and caused severe malformations. Carbohydrate analysis showed increased levels of both soluble sugars and starch in ST plants, with altered carbohydrate partitioning and metabolism. Comparative proteomic analysis revealed only a few differences between ST- and wild-type plants, primary amongst which seemed to be the absence of an isoform of manganese-stabilizing protein, a key subunit of photosystem II. ST mutant exhibits complex developmental and phenotypic modifications, with features that are typical for plants strongly induced to tuberize. These changes are likely to be related to altered regulation of photosynthesis and carbohydrate metabolism rather than impaired transduction of inhibitory gibberellin or photoperiod-based signals. Tuberization in potato represents a morphogenetic transition of stolon growth to tuber formation, which is under complex environmental and endogenous regulation. In the present work, we studied the regulatory mechanisms and the role of different morphogenetic factors in a newly isolated potato mutant, which exhibited spontaneous tuberization (ST). The ST mutant was characterized in detail at morphological, physiological and biochemical levels. Tuberization of the ST mutant grown in the soil was photoperiod-insensitive; predominantly sessile tubers formed directly from axillary buds even under continuous light. Single-node cuttings of the ST mutant cultured in vitro frequently formed tubers or basal tuber-like swellings instead of normal shoots under conditions routinely used for shoot propagation. The tuberization response of ST cuttings under light was dependent on sucrose, the concentration of which had to exceed certain threshold that inversely correlated with irradiance. Gibberellic acid prevented tuberization of ST cuttings, but failed to restore normal shoot phenotype and caused severe malformations. Carbohydrate analysis showed increased levels of both soluble sugars and starch in ST plants, with altered carbohydrate partitioning and metabolism. Comparative proteomic analysis revealed only a few differences between ST- and wild-type plants, primary amongst which seemed to be the absence of an isoform of manganese-stabilizing protein, a key subunit of photosystem II. ST mutant exhibits complex developmental and phenotypic modifications, with features that are typical for plants strongly induced to tuberize. These changes are likely to be related to altered regulation of photosynthesis and carbohydrate metabolism rather than impaired transduction of inhibitory gibberellin or photoperiod-based signals.
dcterms:title
Morphological and molecular characterization of a spontaneously tuberizing potato mutant: an insight into the regulatory mechanisms of tuber induction Morphological and molecular characterization of a spontaneously tuberizing potato mutant: an insight into the regulatory mechanisms of tuber induction
skos:prefLabel
Morphological and molecular characterization of a spontaneously tuberizing potato mutant: an insight into the regulatory mechanisms of tuber induction Morphological and molecular characterization of a spontaneously tuberizing potato mutant: an insight into the regulatory mechanisms of tuber induction
skos:notation
RIV/00216208:11310/08:13184!RIV13-MSM-11310___
n3:aktivita
n4:P n4:Z
n3:aktivity
P(1P05OC037), P(LC06034), P(OC 843.30), P(OC08046), Z(MSM0021620858)
n3:cisloPeriodika
117
n3:dodaniDat
n7:2013
n3:domaciTvurceVysledku
n12:6601626 n12:2937212 n12:8713723
n3:druhVysledku
n17:J
n3:duvernostUdaju
n16:S
n3:entitaPredkladatele
n15:predkladatel
n3:idSjednocenehoVysledku
380616
n3:idVysledku
RIV/00216208:11310/08:13184
n3:jazykVysledku
n8:eng
n3:klicovaSlova
manganese stabilizing protein; mutation; gibberellins; sucrose signaling; regulatory mechanisms of tuberization; potato (Solanum tuberosum)
n3:klicoveSlovo
n5:regulatory%20mechanisms%20of%20tuberization n5:gibberellins n5:potato%20%28Solanum%20tuberosum%29 n5:mutation n5:manganese%20stabilizing%20protein n5:sucrose%20signaling
n3:kodStatuVydavatele
GB - Spojené království Velké Británie a Severního Irska
n3:kontrolniKodProRIV
[734815D8B459]
n3:nazevZdroje
BMC Plant Biology
n3:obor
n14:EF
n3:pocetDomacichTvurcuVysledku
3
n3:pocetTvurcuVysledku
4
n3:projekt
n9:OC08046 n9:OC%20843.30 n9:LC06034 n9:1P05OC037
n3:rokUplatneniVysledku
n7:2008
n3:svazekPeriodika
8
n3:tvurceVysledku
Opatrný, Zdeněk Fischer, Lukáš Lipavská, Helena Hausman, Jean-Francois
n3:wos
000262305100001
n3:zamer
n20:MSM0021620858
s:issn
1471-2229
s:numberOfPages
13
n19:doi
10.1186/1471-2229-8-117
n13:organizacniJednotka
11310