Ethylene and plants of aquatic and semi-aquatic environments: A review

Osborne, Daphne J.

doi:10.1007/bf00124766

Cited by 51 publications

(28 citation statements)

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“…It has been known for several years that ethylene is the most important hormone involved in acclimation and adaptation mechanisms towards submergence (Osborne, 1984). This reflects the intimate relationship between submergence and ethylene levels in plants.…”

Section: Discussionmentioning

confidence: 99%

Physiological Ecology of Riverside Species: Adaptive Responses of Plants to Submergence

Blom

1994

Annals of Botany

149

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In river floodplains, variation in flooding conditions results in successional stages in colonization ranging from annual pioneers to long-lived perennials. Reactions to submergence of species from the mid-successional zone are compared with adaptive responses of species from other zones. Presence and abundance are related to elevation and can be explained by characteristics of biomass production, and recovery in response to various submergence intensities.Rume.x species, from early to late successional stages, serve as models to elucidate, in more detail, mechanisms of adaptation. Flooding-resistant species develop large numbers of adventitious roots upon submergence and exposure to low oxygen conditions. Due to internal oxygen transport through aerenchyma, soil around these roots is re oxidized, which stimulates bacterial nitrification. Ethylene and auxin promote adventitious rooting. Increased petiole elongation is also an adaptive feature of submergence-resistant Rume.x species. Differences between species in submergence-induced growth are not only controlled by variation in endogenous levels of ethylene but also by different sensitivities to this hormone. Auxin does not affect Rume.x petiole elongation, but a clear positive effect of gibberellin is demonstrated. Apparently, submergence induces a higher sensitivity to gibberellin and ethylene in the petioles of flooding-resistant Rume.x. Many of the submergence reactions can also be induced by restricting the oxygen supply, suggesting that low-oxygen might be a triggering factor. The Rume.x species we study represent various distinct communities. Thus, the ecophysiological phenomena observed in these model plants may explain processes and patterns in other species too and thus are interpretable at the riverside community level.

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Section: Discussionmentioning

confidence: 99%

Physiological Ecology of Riverside Species: Adaptive Responses of Plants to Submergence

Blom

1994

Annals of Botany

149

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“…In order to achieve this shootatmosphere contact, petioles and/or internodes must maintain or enhance their elongation rate. Shoot elongation, mediated by the gaseous plant hormone ethylene, has been described for various aquatic, amphibious, and terrestrial plants (Ku et al 1970, Musgrave et al 1972, Osborne 1984, Ridge 1987. However, in spite of the close functional re lationship between shoot elongation and aeren chyma development, almost no research has con centrated on the correlation between these two phe nomena (see Jackson 1989).…”

Section: Flooding-induced Strains and Acclimatizationsmentioning

confidence: 99%

“…When this is combined with the wide variation in the ex tent of flooding resistance among terrestrial plant species, one can expect a great influence on the occurrence and distribution of plant species ). Various aspects of flooding and plant responses have been extensively reviewed in books (Crawford 1987, Etherington 1983, Hook and Craw ford 1978, Hook et al 1988, special journal issues , and separate papers (Armstrong 1979, Blom 1990C, Crawford 1982, 1989, Davy et al 1990, Drew 1983, Drew and Lynch 1980, Ernst 1990, Jackson 1982, 1985A, 1985B, 1987, Laanbroek 1990, Osborne 1984, Ridge 1985. These articles provide clear ev idence that the physical changes accompanying flooding have a strong impact on plant hormones and that these in turn play a central role in the ini tiation and regulation of many acclimatic and/or adaptive responses of terrestrial plants upon flood ing (see also Reid and Bradford 1984).…”

mentioning

confidence: 99%

“…These articles provide clear ev idence that the physical changes accompanying flooding have a strong impact on plant hormones and that these in turn play a central role in the ini tiation and regulation of many acclimatic and/or adaptive responses of terrestrial plants upon flood ing (see also Reid and Bradford 1984). In this con text a key role is reserved for the gaseous plant hormone ethylene (Jackson 1985A, 1985B, 1987, Jackson and Pearce 1991, Ku et al 1970, Mus-grave et al 1972, Osborne 1984, Ridge 1985. Only a few studies on ethylene and flooding, how ever, try to relate interspecific variation in physio logical mechanisms to the ecology of those plant species.…”

mentioning

confidence: 99%

“…Ridge also presented a provoking analysis of both costs and benefits of the two types of ethylene-mediated shoot elongation. Mitchell (1976) and Osborne (1984) also attempted to relate the variation in shoot elongation under water of Polygonum species and Ranunculus species to their field distribution. Dodds and coworkers (1982) ex amined the relation between waterlogging resis tance and ethylene metabolism in 21 different cultivars of Viciafaba.…”

mentioning

confidence: 99%

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