Polyamine accumulation in aged wheat seeds

Anguillesi, M.C.; Grilli, Isa; Tazziolo, R.; Floris, C.

doi:10.1007/bf02890871

Cited by 8 publications

(6 citation statements)

References 23 publications

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“…During both imbibition and radicle-emergence processes, the most abundant PA(S) was Spd, whereas over the postgermination growth period it was Put. Also, Spd was the most abundant PA(S) in seeds of Picea abies (Huang and Villanueva 1992), Triticum durum (Anguillesi et al 1990), Zea mays (Lozano et al 1989), Hordeum vulgare (Nielsen 1990) and Cicer arietinum (Gallardo et al 1992). The endosperm of Zea mays contained no Spd, and the most abundant PA(S) was Put, followed by Spm (Torrigiani et al 1988).…”

Section: Resultsmentioning

confidence: 99%

Polyamine contents, ethylene synthesis, and BrACO2 expression during turnip germination

Puga¹,

Gallardo²,

Rodríguez-Gacio³

et al. 2006

Biologia plant.

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Contents of total free [PA(S)] and conjugated polyamines [PA(SH), PA(PH)] were higher in turnip (Brassica rapa L. cv. Rapa) seeds during imbibition (0 -36 h) and radicle protrusion (36 -48 h) than during the further growth (10 d).Ethylene production was activated with the protrusion, reaching a maximum at the second day of germination and dropping afterwards. The application of ethrel accelerated radicle emergence but the direct intervention of ethylene in the breaking of the seed coat was not clear from the use of ethylene-biosynthesis inhibitors (CoCl 2 and AVG). Finally, in this work the gene BrACO2 was characterized. Although its expression was not detected in seeds through zygotic embryogenesis, it increased concomitantly with the germination process.

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Section: Resultsmentioning

confidence: 99%

Polyamine contents, ethylene synthesis, and BrACO2 expression during turnip germination

Puga¹,

Gallardo²,

Rodríguez-Gacio³

et al. 2006

Biologia plant.

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“…In Picea abies seeds, the most abundant PA is Spd, followed by Spm and Put, the latter being scarcely detectable (Huang and Villanueva, 1992). High Spd concentrations have in fact been found in embryos of Triticum durum (Anguillesi et al, 1990), Zea mays (Lozano et al, 1989), Hordeum vulgare (Nielsen, 1990) and Cicer arietinum (Gallardo et al, 1992a). Recently, the PA amounts in whole seeds have been quantified in three endemic legume species living at different altitudes and only the Put amounts changed with altitude (Angosto and Matilla, 1993).…”

Section: Polyamines In Matured Dry Seedsmentioning

confidence: 99%

Polyamines and seed germination

Matilla

1996

SSR

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This review examines the presence of free and bound PAs during the life cycle of seeds. Although data are still rather scarce, PAs, present, but with an unknown function during embryogenesis, are accumulated in relatively high quantities in mature dry seeds of some species. PA concentration can be altered by the process of stratification, and PAs are synthesized in growing organs after germination, but it is also possible that the reserve organs synthesize and export some types of PA to the axis. This metabolism and sink-source relationship depend on the germination conditions and on the greater or lesser presence of enzymes related to synthesis (ADC, ODC, LDC and AdoMetDC) and degradation (DAO and PAO) of free PAs. The biochemical mechanism binding the PAs to a series of compounds of low and high molecular weight is currently unknown in seeds. The present study also considers intra- and intercellular compartmentation of free and bound PAs in growing axes and the physiological implications of the ethylene-production pathway in relation to seed behaviour.

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“…seeds that can be stored with a low moisture content (Bewley and Black, 1994), retain viability for varying periods and with time they succumb and die. There is generally a gradual decline in germinability and the subsequent vigour of the resultant seedling (Leopold, 1980;Anguillesi et al, 1990;Alsadon et al, 1995;Rice and Deyer, 2001), associated with a higher sensitivity to stress upon germination, and eventually a loss of the ability to germinate.…”

Section: Introductionmentioning

confidence: 97%