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Statements

Subject Item
n2:RIV%2F61389030%3A_____%2F12%3A00382086%21RIV13-AV0-61389030
rdf:type
n9:Vysledek skos:Concept
dcterms:description
The SE7 somaclonal line of finger millet (Eleusine coracana) achieved increased grain yield in field trials that apparently resulted from a higher number of inflorescences and seeds per plant, compared with the wild type. Levels of endogenous cytokinins, especially those of highly physiologically active iso-pentenyl adenine, were increased during early inflorescence development in SE7 plants. Transcript levels of cytokinin-degrading enzymes but not of a cytokinin-synthesizing enzyme were also decreased in young leaves, seedlings, and initiating inflorescences of SE7. These data suggest that attenuated degradation of cytokinins in SE7 inflorescences leads to higher cytokinin levels that stimulate meristem activity and result in production of more inflorescences. Gene expression was compared between SE7 and wild-type young inflorescences using the barley 12K cDNA array. The largest fraction of up-regulated genes in SE7 was related to transcription, translation, and cell proliferation, cell wall assembly/biosynthesis, and to growth regulation of young and meristematic tissues including floral formation. Other up-regulated genes were associated with protein and lipid degradation and mitochondrial energy production. Down-regulated genes were related to pathogen defence and stress response, primary metabolism, glycolysis, and the C:N balance. The results indicate a prolonged proliferation phase in SE7 young inflorescences characterized by up-regulated protein synthesis, cytokinesis, floral formation, and energy production. In contrast, wild-type inflorescences are similar to a more differentiated status characterized by regulated protein degradation, cell elongation, and defence/stress responses. It is concluded that attenuated degradation of cytokinins in SE7 inflorescences leads to higher cytokinin levels, which stimulate meristem activity, inflorescence formation, and seed set. The SE7 somaclonal line of finger millet (Eleusine coracana) achieved increased grain yield in field trials that apparently resulted from a higher number of inflorescences and seeds per plant, compared with the wild type. Levels of endogenous cytokinins, especially those of highly physiologically active iso-pentenyl adenine, were increased during early inflorescence development in SE7 plants. Transcript levels of cytokinin-degrading enzymes but not of a cytokinin-synthesizing enzyme were also decreased in young leaves, seedlings, and initiating inflorescences of SE7. These data suggest that attenuated degradation of cytokinins in SE7 inflorescences leads to higher cytokinin levels that stimulate meristem activity and result in production of more inflorescences. Gene expression was compared between SE7 and wild-type young inflorescences using the barley 12K cDNA array. The largest fraction of up-regulated genes in SE7 was related to transcription, translation, and cell proliferation, cell wall assembly/biosynthesis, and to growth regulation of young and meristematic tissues including floral formation. Other up-regulated genes were associated with protein and lipid degradation and mitochondrial energy production. Down-regulated genes were related to pathogen defence and stress response, primary metabolism, glycolysis, and the C:N balance. The results indicate a prolonged proliferation phase in SE7 young inflorescences characterized by up-regulated protein synthesis, cytokinesis, floral formation, and energy production. In contrast, wild-type inflorescences are similar to a more differentiated status characterized by regulated protein degradation, cell elongation, and defence/stress responses. It is concluded that attenuated degradation of cytokinins in SE7 inflorescences leads to higher cytokinin levels, which stimulate meristem activity, inflorescence formation, and seed set.
dcterms:title
A somaclonal line SE7 of finger millet (Eleusine coracana) exhibits modified cytokinin homeostasis and increased grain yield A somaclonal line SE7 of finger millet (Eleusine coracana) exhibits modified cytokinin homeostasis and increased grain yield
skos:prefLabel
A somaclonal line SE7 of finger millet (Eleusine coracana) exhibits modified cytokinin homeostasis and increased grain yield A somaclonal line SE7 of finger millet (Eleusine coracana) exhibits modified cytokinin homeostasis and increased grain yield
skos:notation
RIV/61389030:_____/12:00382086!RIV13-AV0-61389030
n9:predkladatel
n10:ico%3A61389030
n3:aktivita
n13:Z n13:P
n3:aktivity
P(GA522/09/2058), Z(AV0Z50380511)
n3:cisloPeriodika
15
n3:dodaniDat
n15:2013
n3:domaciTvurceVysledku
n16:9744886 n16:1455451
n3:druhVysledku
n14:J
n3:duvernostUdaju
n12:S
n3:entitaPredkladatele
n18:predkladatel
n3:idSjednocenehoVysledku
120628
n3:idVysledku
RIV/61389030:_____/12:00382086
n3:jazykVysledku
n20:eng
n3:klicovaSlova
Cytokinin; cytokinin metabolism; finger millet
n3:klicoveSlovo
n11:Cytokinin n11:finger%20millet n11:cytokinin%20metabolism
n3:kodStatuVydavatele
GB - Spojené království Velké Británie a Severního Irska
n3:kontrolniKodProRIV
[3AD83F82640A]
n3:nazevZdroje
Journal of Experimental Botany
n3:obor
n17:ED
n3:pocetDomacichTvurcuVysledku
2
n3:pocetTvurcuVysledku
10
n3:projekt
n19:GA522%2F09%2F2058
n3:rokUplatneniVysledku
n15:2012
n3:svazekPeriodika
63
n3:tvurceVysledku
Yemets, A. Radchuk, R. Blume, Y. B. Radchuk, V. Vaňková, Radomíra Gaudinová, Alena Pirko, Y. Korkhovoy, V. Weber, H. Weschke, W.
n3:wos
000309140100010
n3:zamer
n8:AV0Z50380511
s:issn
0022-0957
s:numberOfPages
10
n5:doi
10.1093/jxb/ers200