Polyamines bound to nucleic acids during dormancy and activation of tuber cells of <i>Helianthus tuberosus</i>

Serafini-Fracassini, Donatella; Torrigiani, Patrizia; Branca, C.

doi:10.1111/j.1399-3054.1984.tb06075.x

Cited by 26 publications

(30 citation statements)

References 32 publications

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“…1). Further analysis of several varieties having different ploidy is necessary to make a conclusive statement, especially as the question of polyamine binding to nucleic acids in living cells is not yet extensively investigated (Serafini-Fracassini et al 1984).…”

Section: Resultsmentioning

confidence: 99%

Association of polyamines to different parts of various plant species

Felix¹,

Harr²

1987

Physiologia Plantarum

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J. 1987. Association of polyamines to different parts of various plant species. -Physiol. Plant. 71: 245-250.The variation in polyattiine content in different plant species and in different parts within a plant can be considerable. To get genera! information about levels of polyamines in plants and about the association of polyattiines to different types of tissue, 30 plants from 13 plant families were examined for their polyamine content before and after gennination using high pressure liquid chromatography (HPLC) analysis. A marked increase in polyamine content occurs in the cotyledons or etidosperms in the seeds on germination, i.e. in the nutrient storing and exporting part of the plant. In the radicle, hypocotyl or coleoptile, i.e. growing parts of the plant, an increase in polyamine content is rarely observed. Additionally, polyamine levels can be very low [below 1 nmol (g fresh weight)''] in different parts of various species. Obviously, levels in the pmol (g fresh weight) ' range satisfy the needs of many growing plant parts. The high levels of polyamines found especiaDy in cotyledons cannot be explained by their postulated association with increased cell division rates.

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Section: Resultsmentioning

confidence: 99%

Association of polyamines to different parts of various plant species

Felix¹,

Harr²

1987

Physiologia Plantarum

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“…Polyamines stabilize nucleic acids [29], and are essential to steps in transcription and translation [30]. Serafini-Fracassini et al [31] suggested that newly synthesized polyamines become bound to RNA to make it active and protect RNA in vivo against stress-induced RNase activity. Inhibition of polyamine biosynthesis by DFMO may therefore affect the transcription process and consequently plant-mycorrhizal fungus interactions.…”

Section: Discussionmentioning

confidence: 99%

First‐report of the inhibition of arbuscular mycorrhizal infection of Pisum sativum by specific and irreversible inhibition of polyamine biosynthesis or by gibberellic acid treatment

et al. 1996

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DFMO (~-DL-difluoromethylornithine), a specific irreversible inhibitor of ornithine decarboxylase (ODC), a polyamine biosynthetic pathway enzyme, strongly inhibits root growth and arbuscular mycorrhizal infection of Pisum sativum (P56 myc +, isogenic mutant of cv. Frisson). This inhibition is reversed when exogenous polyamine (putrescine) is included in the DFMO treatment, showing that the effect of DFMO on arbuscular mycorrhizal infection is indeed due to putrescine limitation and suggesting that ODC may have a role in root growth and mycorrhizal infection. However, treatment with gibbereHic acid (GA3) which increased root titers of polyamines strongly inhibited arbuscular mycorrhizal development. The possible role of polyamines in the regulation of the development of arbuscular mycorrhizal infection is discussed.

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“…It is known that polyamines play a stabilizing role on nucleic acids (Bagni, Stabellini & Serafini-Fracassini, 1973) and that they are essential in every step of transcription and translation (Stevens, 1970). Recently, Serafini-Fracassini, Torrigiani & Branca (1984) suggested that newly synthesised polyamines become bound to new RNA to make it active. Furthermore, these authors also suggest that polyamines can protect RNA in vivo against stress-induced damage by inhibition of wound-induced RNase activity.…”

Section: Discussionmentioning

confidence: 99%

RELATIVE CHANGES IN LEVELS OF POLYAMINES AND ACTIVITIES OF THEIR BIOSYNTHETIC ENZYMES IN BARLEY INFECTED WITH THE POWDERY MILDEW FUNGUS, ERYSIPHE GRAMINIS D.C. ex MERAT f.sp. HORDEI MARCHAL

1985

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SUMMARYThe concentrations of three amines (putrescine, spernaidine and spermine) were much increased in first leaves of barley infected with powdery mildew, whilst the concentrations of putrescine and spermidine in roots of mildewed barley were significantly decreased. Although no significant change in the activities of three polyamine biosynthetic enzymes (ADC, arginine decarboxylase; ODC, ornithine decarboxylase; and SAMDC, S-adenosyl methionine decarboxylase) could be detected in roots of mildewed barley, the activities of ADC, ODC and SAMDC were increased in infected first leaves. The significance of these alterations in poly amines and their biosynthetic enzymes in mildewed barley is discussed.

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Polyamines bound to nucleic acids during dormancy and activation of tuber cells of Helianthus tuberosus

Cited by 26 publications

References 32 publications

Association of polyamines to different parts of various plant species

Association of polyamines to different parts of various plant species

First‐report of the inhibition of arbuscular mycorrhizal infection of Pisum sativum by specific and irreversible inhibition of polyamine biosynthesis or by gibberellic acid treatment

RELATIVE CHANGES IN LEVELS OF POLYAMINES AND ACTIVITIES OF THEIR BIOSYNTHETIC ENZYMES IN BARLEY INFECTED WITH THE POWDERY MILDEW FUNGUS, ERYSIPHE GRAMINIS D.C. ex MERAT f.sp. HORDEI MARCHAL

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