Petiole growth in the celery-leaved crowfoot (Ranunculus sceleratus L.): Effects of auxin-transport inhibitors

Horton, Roger F.; Samarakoon, Ananda B.

doi:10.1016/0304-3770(82)90044-4

Cited by 30 publications

(14 citation statements)

References 14 publications

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“…8). Thus, this species contrasts with Regnellidium diphyllum, Ranunculus sceleratus and Nymphoides peltata, in which auxin is required for ethylene action (Walters and Osborne, 1979;Horton and Samarakoon, 1982;Malone and Ridge, 1983). A combination of ethylene and auxin treatment of three aquatic plants, Regnellidium diphyllum, Hvdrocharis morsus-ranae and Ranunculus sceleratus showed that eth ylene and auxin effects are additive (Cookson and Osborne, 1978;Smulders and Horton, 1991) and both enhance elongation.…”

Section: Discussionmentioning

confidence: 93%

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: 93%

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

Blom

1994

Annals of Botany

149

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“…Apart from ethylene, stimulated shoot elongation also depends on the presence of auxin (Horton and Samarakoon, 1982) or GAs (Raskin and Kende, 1984a). Studies of the effect of gases other than ethylene on stimulated shoot elongation showed that the promotive action of O, and CO, on elongation operated Present address:…”

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confidence: 99%

Ethylene Sensitivity and Response Sensor Expression in Petioles of Rumex Species at Low O2 and High CO2 Concentrations

et al. 1997

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Some aquatic and amphibious plant species respond to complete submergence with stimulated elongation of shoot organs. This adaptive reaction allows the survival of these plants in habitats with sustained high water levels by reestablishing contact with the aerial environment ( Van der Sman et al., 1991. The O, status of the roots improves as shoots emerge from the water (Armstrong et al., 1994). At the same time, root-growth-inhibiting amounts of the gaseous plant hormone ethylene that had accumulated in flooded roots can be vented off .Ethylene plays a key role in stimulated shoot elongation in many wetland plants; however, other plant hormones and gases also affect this submergence response (Ridge, 1987;. Apart from ethylene, stimulated shoot elongation also depends on the presence of auxin (Horton and Samarakoon, 1982) or GAs (Raskin and Kende, 1984a). Studies of the effect of gases other than ethylene on stimulated shoot elongation showed that the promotive action of O, and CO, on elongation operated Present address:

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“…Previous studies have shown that the response to ethylene of isolated petiole segments is dependent upon the presence of either an attached leaf blade or low (0.1-1 gM) levels of auxin (8,23).…”

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confidence: 99%

Ethylene Promotes Elongation Growth and Auxin Promotes Radial Growth in Ranunculus sceleratus Petioles

Smulders¹,

Horton²

1991

Plant Physiol.

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Petiole growth in the celery-leaved crowfoot (Ranunculus sceleratus L.): Effects of auxin-transport inhibitors

Cited by 30 publications

References 14 publications

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

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

Ethylene Sensitivity and Response Sensor Expression in Petioles of Rumex Species at Low O2 and High CO2 Concentrations

Ethylene Promotes Elongation Growth and Auxin Promotes Radial Growth in Ranunculus sceleratus Petioles

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