Modifications des Isoperoxydases et de l'Allongement des Entre-Noeuds de Bryone à la Suite d'Irritations Mécaniques

Boyer, Nicole; Gaspar, Th.; Lamond, M.

doi:10.1016/s0044-328x(79)80180-4

Cited by 43 publications

(26 citation statements)

References 8 publications

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“…Such a result is not surprising because peroxidase activity generally increases with age [1]. As the second leaf sheath was older than the leaves forming the pseudo-stem, the age of each organ accounts for the results obtained.…”

Section: Discussionmentioning

confidence: 69%

Peroxidase activity of perennial ryegrass and tall fescue seedlings artificially infected with endophytes

Naffaa¹,

Ravel

Boyer

et al. 1999

Agronomie

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Section: Discussionmentioning

confidence: 69%

Peroxidase activity of perennial ryegrass and tall fescue seedlings artificially infected with endophytes

Naffaa¹,

Ravel

Boyer

et al. 1999

Agronomie

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“…Several papers have been published concerning the mechanism that could explain the modification of B. dioica internode growth induced by a mechanical stimulus (Boyer et al, 1979(Boyer et al, , 1983(Boyer et al, , 1986De Jaegher et al, 1985;De Jaegher and Boyer, 1987;Bourgeade et al, 1991;Galaud et al, 1993;Thonat et al, 1993;Bourgeade and Boyer, 1994;Mathieu et al, 1995). Among the processes that seem to be rapidly affected by this stimulus are the modifications of plasma membrane lipids (Mathieu et al, 1995), Ca 2+ redistribution (Thonat et al, 1993), and the expression of a calmodulin gene (Galaud et al, 1993).…”

Section: Discussionmentioning

confidence: 99%

“…Mechanical stimulation exerted on young internodes of Bryonia dioica reduces their elongation and increases their radial expansion (Boyer et al, 1979). This process is known as thigmomorphogenesis, a developmental response in plants to a mechanical stress (Jaffé, 1973).…”

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confidence: 99%

Effects of a Mechanical Stimulation on Localization of Annexin-Like Proteins in Bryonia dioica Internodes

et al. 1997

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Mechanical stimulation exerted by rubbing a young internode of Bryonia dioica plants inhibits its growth. Previous cellular and biochemical studies showed that this growth inhibition is associated with Ca2+ redistribution and profound modifications of plasma membrane characteristics. We extracted and purified Caz+-dependent phospholipid-bindíng proteins from 6. dioica internodes. Two main proteins, p33 and p35, and other minor bands were isolated and identified as annexin-like proteins because of their biochemical properties and their cross-reactions with antibodies against maize (Zea mays 1.) annexins. Rabbít antiserum was obtained by injection of 8. dioica p35. This antiserum was used for the immunocytolocalization of annexin-like proteins in internode parenchyma cells. It appeared that the distribution of annexin-like proteins was different before and 30 min after the mechanical stimulation. Western analysis of proteins in membrane fractions after separation by free-flow electrophoresis showed that p35 was present in most fractions, whereas p33 appeared mainly in plasmalemma-enriched fractions after the mechanical stimulation. It is hypothesized that a subcellular redistribution of these proteins might be involved in growth inhibition by mechanical stress.

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“…Rubbing young internodes of many plants results in growth cessation and increased radial expansion of the internodes (3,(5)(6)(7)(8)(9)15). In Bryonia dioica the reduced elongation has been related to changes in cell wall mechanical properties resulting from an accelerated lignification (9).…”

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Specific Inhibition of Lignification in Bryonia dioica

Jaegher¹,

Boyer²

1987

Plant Physiol.

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Rubbing-induced lignification in Bryonia dioica internodes is significantly impaired by N(o-hydroxyphenyl) and N(o-aminophenyl) sulfinamoyl tertiobutyl acetate, specific inhibitors of cinamyl alcohol dehydrogenase, an enzyme which is strictly associated with lignin monomer synthesis. Along with the reduction of lignification, these inhibitors counteract the inhibition of elogtion due to rubbing. These results indicate that lignification participates in the thigmomorphogenetic growth response of Bryonia dioica internodes. In a general way, the data point to the causal role of lignification in the limitation of plant growth.Rubbing young internodes of many plants results in growth cessation and increased radial expansion of the internodes (3, 5-9, 15). In Bryonia dioica the reduced elongation has been related to changes in cell wall mechanical properties resulting from an accelerated lignification (9).Several molecules able to reduce lignification have already been defined. Phenylalanine ammonia-lyase is inhibited by aaminooxy-,3-phenylpropionic acid (1) and cinnamate 4-hydroxylase by l-aminobenzotriazole (16). Unfortunately, these two target enzymes are involved in general phenylpropanoid metabolism rather than specifically associated with lignification. In addition, phenylalanine ammonia-lyase inhibitors act also on pyridoxal phosphate enzymes involved in ethylene (10) and amino acid synthesis (2). In contrast, the reductive enzyme cinnamyl alcohol dehydrogenase is strictly associated with the synthesis oflignin monomers and is inhibited in a highly specific way by OHPAS2 and NH2PAS (4,13 The last growing internodes (± 15 mm long) were gently rubbed after 1 d inhibitor feeding. For all analyses internodes were harvested 24 or 48 h after the rubbing treatments. All experiments were repeated at least three times (results ± SE).Lignin Content. Lignin content of cell wall preparations was estimated according to the technique reported before (9). RESULTSRubbing-induced inhibition of internode elongation is significantly counteracted by treatment ofthe plants with OHPAS and NH2PAS, both supplied at the concentration of 40 ,uM (Fig. 1A).Inhibitor feeding at the concentration of 80 AM appeared toxic because of wilting of the plants within 24 h. The slight reducing effect of the inhibitors on elongation of nonrubbed internodes may be a thigmomorphogenetic response due to manipulation ofthe plants. This seems to be confirmed by a concomitant slight increase in lignin content (Fig. 1B). No significant differences

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Modifications des Isoperoxydases et de l'Allongement des Entre-Noeuds de Bryone à la Suite d'Irritations Mécaniques

Cited by 43 publications

References 8 publications

Peroxidase activity of perennial ryegrass and tall fescue seedlings artificially infected with endophytes

Peroxidase activity of perennial ryegrass and tall fescue seedlings artificially infected with endophytes

Effects of a Mechanical Stimulation on Localization of Annexin-Like Proteins in Bryonia dioica Internodes

Specific Inhibition of Lignification in Bryonia dioica

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