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Titolo:
Measurement of viscoelastic properties of root cell walls affected by low pH in lateral roots of Pisum sativum L.
Autore:
Tanimoto, E; Fujii, S; Yamamoto, R; Inanaga, S;
Indirizzi:
Nagoya City Univ, Inst Nat Sci, Div Biomol Sci, Nagoya, Aichi 4678501, Japan Nagoya City Univ Nagoya Aichi Japan 4678501 Nagoya, Aichi 4678501, Japan Tezukayama Coll, Biol & Chem Lab, Nara 6310034, Japan Tezukayama Coll Nara Japan 6310034 Biol & Chem Lab, Nara 6310034, Japan Tottori Univ, Arid Land Res Ctr, Tottori 6800001, Japan Tottori Univ Tottori Japan 6800001 Land Res Ctr, Tottori 6800001, Japan
Titolo Testata:
PLANT AND SOIL
fascicolo: 1, volume: 226, anno: 2000,
pagine: 21 - 28
SICI:
0032-079X(2000)226:1<21:MOVPOR>2.0.ZU;2-C
Fonte:
ISI
Lingua:
ENG
Soggetto:
ACID-GROWTH THEORY; STRESS-RELAXATION PROPERTIES; YIELD THRESHOLD; GIBBERELLIC-ACID; MECHANICAL-PROPERTIES; INDUCED ELONGATION; COWPEA HYPOCOTYL; STEM SEGMENTS; PEA ROOTS; ZEA-MAYS;
Keywords:
acid pH; cell wall; creep extension; lateral roots; Pisum sativum; viscoelastic parameters;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Agriculture,Biology & Environmental Sciences
Citazioni:
42
Recensione:
Indirizzi per estratti:
Indirizzo: Tanimoto, E Nagoya City Univ, Inst Nat Sci, Div Biomol Sci, Nagoya, Aichi 4678501, Japan Nagoya City Univ Nagoya Aichi Japan 4678501 hi 4678501, Japan
Citazione:
E. Tanimoto et al., "Measurement of viscoelastic properties of root cell walls affected by low pH in lateral roots of Pisum sativum L.", PLANT SOIL, 226(1), 2000, pp. 21-28

Abstract

Mechanical extensibility of the cell wall limits the elongation growth of roots. Low pH, ranging from pH 3-4.5, induces rapid elongation of excised roots, a phenomenon known as acid growth. The creep-extension analysis was carried out to measure and elucidate the viscoelastic properties of root cell walls in the acidic environment in vitro. The viscoelastic properties were determined at the elongation zone of the lateral roots of pea ( Pisum sativum L. cv. Alaska) and described by the physical parameters of three elastic (E-0, E-1, E-2) and three viscosity (eta (0), eta (1), eta (2)) parameters using a Kelvin-Voigt-Burgers' model. The present method could measure the viscoelasticity of 1-mm long root zones from 2 to 9 mm behind the tip. Among the parameters, E-0 and eta (0) were the most significant parameters torepresent the whole extensibility of the roots. The parameter eta (0) markedly declined in response to the environmental low pH (acid growth), whereas other parameters were not much affected by low pH. Relationship between the change in these physical parameters and the change in cell wall extensibility under low pH was discussed in order to elucidate the rheological processes taking place in the elongating cell walls.

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Documento generato il 20/09/20 alle ore 07:02:24