Comparison between some effects of fusicoccin and indole-3-acetic acid on cell enlargement in various plant materials

Lado, P.; Pennachioni, A.; Caldogno, F. Rasi; Russi, Serena; Silano, Vittorio

doi:10.1016/0048-4059(72)90050-1

Cited by 37 publications

(11 citation statements)

References 8 publications

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“…A fundamental question is whether the effect of FC on germination can be explained as a direct consequence of its capacity io promote cell enlargement (and thus water uptake) in the seed tissues. Previous works in this laboratory show that increasing the osmolarity of the germination medium depresses cell enlargement and the development of oxidative metabolism in the embryo (Lado 1964), and that continuous water uptake during the early phase of germination is required for active protein synthesis (Sturani et al 1968, Hsiao 1970. The data of Ikuma and Thimann (1963) and Chen and Thimann (1966) also support the possibility that an increased capacity of the cell for water uptake might be a crucial factor in both germination and interruption of dormancy.…”

Section: Discussionsupporting

confidence: 52%

“…In previous papers we have shown that fusicoccin not only stimulates growth by cell enlargement in various plant tissues (Lado et al 1971, Yamagata and Masuda 1974 but also affects seed germination both by accelerating the normal process of development and by replacing light and phytohormones (BA or GAj) in breaking dormancy (Lado et cd. 1974).…”

Section: Introductionmentioning

confidence: 99%

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Acidification of the Medium Associated with Normal and Fusicoccin‐Induced Seed Germination

Lado¹,

Rasi‐Caldogno²,

Colombo³

1975

Physiologia Plantarum

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Fusicoccin, a toxin stimulating cell enlargement and inducing proton extrusion in various plant tissues, has been shown to replace kinetin, gibberellic acid and red light in breaking seed dormancy. It also removes the inhibitory effect of abscisic acid. The present data also show that the stimulating effect of fucicoccin on embryo growth of decoated radish (Raphanus sativus L.) and maize (Zea mays) seeds and on the development of maize embryos is accompanied by an early, significant acidification of the medium. Acidification of the medium is also observed when fusicoccin reverses the abscisic acid‐induced inhibition of germination. These results support the hypothesis that the mode of action of fusicoccin in promoting germination involves, as in stimulation of cell enlargement, the activation at the cell membrane level of proton extrusion processes. The physiological significance of fusicoccin‐induced release of protons at the onset of germination is discussed in comparison with the results concerning the mechanism of action of fusicoccin on cell enlargement in other plant materials.

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Section: Discussionsupporting

confidence: 52%

Section: Introductionmentioning

confidence: 99%

Acidification of the Medium Associated with Normal and Fusicoccin‐Induced Seed Germination

Lado¹,

Rasi‐Caldogno²,

Colombo³

1975

Physiologia Plantarum

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“…Lado et al (59) confirmed the observation that toxin-treated pea segments showed increased water uptake over non treated controls in leaf discs of tomato, clover, and tobacco. Since the osmotic pressure values of treated tissues were lower than those of the control, the authors concluded that fusicoccin acts to irreversibly extend the cell wall.…”

Section: Fusicoccinmentioning

confidence: 56%

Phytotoxins Produced by Plant Parasites

Strobel¹

1974

Annu. Rev. Plant. Physiol.

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“…Addition of fusicoccin can largely reverse this growth inhibition particularly in the presence of K+ (Lado, De Michelis et al, 1976;Cocucci et al, 1976). However, addition of fusicoccin has little or no effect on the growth rates of intact roots (Lado et al, 1972). Should we then conclude from this that excision has removed the source of an endogenous fusicoccin and that' in vivo' growth is controlled by such a substance ?…”

Section: The Effect Of Tissue Excision and The Experimental Reactivatmentioning

confidence: 99%

Regulation of Plant Cell Growth: The Changing Perspective

Hanson

Trewavas

1982

New Phytologist

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Summary This article outlines the main features of growth regulation by auxin and places them side‐by‐side with the physiological properties of fusicoccin. The fundamental role of the plasma membrane located H+/K+ ATPase in growth responses is examined and the information about this enzyme briefly reviewed. The effects of wounding on the activity of this enzyme are detailed and it is concluded that growth in excised tissue segments ceases not from lack of hormone but from impairment of ATPase function. An additional conclusion of major importance for hormone studies is reached; that is, that the experimentally‐realized reactivation of growth by auxin in excised tissues represents largely an accelerated recovery from injury. Furthermore the calmodulin/Ca2+ system may be an essential intermediary in this recovery step. Finally, the major area of ignorance, predisposition to growth, is considered.

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Comparison between some effects of fusicoccin and indole-3-acetic acid on cell enlargement in various plant materials

Cited by 37 publications

References 8 publications

Acidification of the Medium Associated with Normal and Fusicoccin‐Induced Seed Germination

Acidification of the Medium Associated with Normal and Fusicoccin‐Induced Seed Germination

Phytotoxins Produced by Plant Parasites

Regulation of Plant Cell Growth: The Changing Perspective

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