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Titolo:
Barley yellow dwarf virus: effects on carbohydrate metabolism in oat (Avena sativa) during cold hardening
Autore:
Livingston, DP; Gildow, FE; Liu, SY;
Indirizzi:
N Carolina State Univ, ARS, USDA, Raleigh, NC 27695 USA N Carolina State Univ Raleigh NC USA 27695 S, USDA, Raleigh, NC 27695 USA N Carolina State Univ, Dept Crop Sci, Raleigh, NC 27695 USA N Carolina State Univ Raleigh NC USA 27695 rop Sci, Raleigh, NC 27695 USA Penn State Univ, Dept Plant Pathol, University Pk, PA 16802 USA Penn StateUniv University Pk PA USA 16802 l, University Pk, PA 16802 USA Penn State Univ, Dept Agron, University Pk, PA 16802 USA Penn State Univ University Pk PA USA 16802 n, University Pk, PA 16802 USA
Titolo Testata:
NEW PHYTOLOGIST
fascicolo: 4, volume: 140, anno: 1998,
pagine: 699 - 707
SICI:
0028-646X(199812)140:4<699:BYDVEO>2.0.ZU;2-W
Fonte:
ISI
Lingua:
ENG
Soggetto:
FRUCTAN METABOLISM; CROWNS; WHEAT; ACCUMULATION; GRASSES; LEAVES;
Keywords:
barley yellow dwarf virus; carbohydrate metabolism; cold hardening; Avena sativa L. (oat); fructans;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Agriculture,Biology & Environmental Sciences
Citazioni:
24
Recensione:
Indirizzi per estratti:
Indirizzo: Livingston, DP N Carolina State Univ, ARS, USDA, Raleigh, NC 27695 USA N Carolina State Univ Raleigh NC USA 27695 h, NC 27695 USA
Citazione:
D.P. Livingston et al., "Barley yellow dwarf virus: effects on carbohydrate metabolism in oat (Avena sativa) during cold hardening", NEW PHYTOL, 140(4), 1998, pp. 699-707

Abstract

Barley yellow dwarf virus (BYDV) causes significant losses in yield and inoverwintering ability of winter cereals. Mechanisms by which the physiology of plants is affected by the virus are not clear. To see how carbohydrates in the crown of winter cereals were affected by BYDV, fructan isomers of degree of polymerization (DP) 3-5, fructan DP > 6 and the simple sugars, glucose, fructose and sucrose, were measured before and during cold hardeningin three oat (Avena sativa L.) cultivars,'Wintok', 'Coast Black' and 'Fulghum'. On a fresh weight basis fructan DP > 6 decreased by 50 %, in infected'Wintok' and 'Coast Black' and by 25 %, in 'Fulghum'. Two DP3, one DP4 andone DP5 isomer were significantly higher than non-infected controls. The percentages of simple sugars in infected crowns were significantly higher than controls in all three cultivars in every week except the first week of hardening. Crude enzyme extracts from BYDV infected plants incubated with sucrose suggested higher invertase and lower sucrose-sucrosyl transferase activity. When incubated with 1-kestose and neokestin, no significant difference was found in fructose fructosyl transferase or in hydrolase activity. The activity of unidentified enzymes catalysing the synthesis of larger (DP >5) fructan was altered by BYDV. The decrease of carbohydrates in the crowninduced indirectly by BYDV may alter the plant's capacity to regenerate tillers in the spring. The ability of plants to prevent or tolerate carbohydrate fluctuations induced by BYDV infection may be an important genetically regulated characteristic for developing virus-resistant cultivars.

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Documento generato il 30/09/20 alle ore 05:09:25