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Titolo:
Galactosyl-sucrose oligosaccharides and potential longevity of primed seeds
Autore:
Gurusinghe, S; Bradford, KJ;
Indirizzi:
Univ Calif Davis, Dept Vegetable Crops, Davis, CA 95616 USA Univ Calif Davis Davis CA USA 95616 Vegetable Crops, Davis, CA 95616 USA
Titolo Testata:
SEED SCIENCE RESEARCH
fascicolo: 2, volume: 11, anno: 2001,
pagine: 121 - 133
SICI:
0960-2585(200106)11:2<121:GOAPLO>2.0.ZU;2-M
Fonte:
ISI
Lingua:
ENG
Soggetto:
DESICCATION TOLERANCE; PHASE-TRANSITIONS; DRY MEMBRANES; ABSCISIC-ACID; GLASSY STATE; GERMINATION; MATURATION; CHROMATOGRAPHY; DETERIORATION; STABILITY;
Keywords:
impatiens; Impatiens balsamina L.; lettuce; Lactuca sativa L.; oligosaccharides; planteose; raffinose; seed longevity; seed priming; tomato; Lycopersicon esculentum Mill.;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Agriculture,Biology & Environmental Sciences
Citazioni:
41
Recensione:
Indirizzi per estratti:
Indirizzo: Bradford, KJ Univ Calif Davis, Dept Vegetable Crops, 1 Shields Ave, Davis,CA 95616 USA Univ Calif Davis 1 Shields Ave Davis CA USA 95616 A 95616 USA
Citazione:
S. Gurusinghe e K.J. Bradford, "Galactosyl-sucrose oligosaccharides and potential longevity of primed seeds", SEED SCI R, 11(2), 2001, pp. 121-133

Abstract

Correlative evidence indicates that sucrose and alpha -galactosyl-sucrose oligosaccharides (raffinose family oligosaccharides; RFOs) may be involved in seed longevity. Priming treatments (hydration in water or osmotic solutions followed by drying) can improve shortterm seed performance but often result in reduced seed longevity. As RFOs are metabolized quickly following seed imbibition, loss of RFOs during priming could lead to more rapid deterioration in dry storage. This hypothesis was tested by measuring sucrose andoligosaccharide contents and potential longevity of primed seeds. Raffinose contents of whole lettuce (Lactuca sativa L.) seeds declined during hydration and priming and were correlated with decreased median potential viability (ps,). However, this relationship was less significant when only the embryonic axes were analysed. In tomato (Lycopersicon esculentum Mill.) and impatiens (Impatiens balsamina L.) seeds, planteose was the major galactosyl-sucrose oligosaccharide and only small quantities of RFOs were present. Planteose contents declined during priming in seeds of both species, while sucrose contents increased or remained constant. Post-priming treatments thatrestored longevity in primed impatiens and tomato seeds were not accompanied by consistent changes in RFO or planteose contents. Our data do not ruleout a role for oligosaccharides in seed longevity, but they make it unlikely that changes in oligosaccharide contents alone are responsible for the reduction in longevity due to priming or its restoration by post-priming treatments.

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Documento generato il 07/07/20 alle ore 12:47:44