Petiole growth in <i>Ranunculus sceleratus</i>: the role of growth regulators and the leaf blade

Samarakoon, Ananda B.; Horton, Roger F.

doi:10.1139/b83-373

Cited by 20 publications

(8 citation statements)

References 13 publications

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“…A shorter paclobutrazol pretreatment of 4 d in combi nation with GA} treatment did restore the growth response upon submergence completely, but in this case petiole growth was not reduced to air-grown levels by the pretreatment. A similar effect of the synthetic GAbiosynthesis inhibitors 2'-isopropyl-4'-( trimethyl ammo nium chloride)-5'-methylphenyl piperidene-1-carboxylate (AMO-1618) and 2-chloroethyltrimethyl-ammonium chloride (CCC) has been reported in R anunculus sceleratus (Samarakoon and Horton 1983). However, in Ca/lit riche plat y ea r pa (Musgrave et al 1972) and deepwater rice (Raskin and Kende 1984a), inhibition of the submergence response with GA-biosynthesis inhib itors could be completely relieved by G A 3.…”

Section: Discussionsupporting

confidence: 56%

Ethylene enhances gibberellin levels and petiole sensitivity in flooding-tolerant Rumex palustris but not in flooding-intolerant R. acetosa

Rijnders

Yang

Kamiya

et al. 1997

Planta

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Abstract. The role of gibberellin (GA) and ethylene in submergence-induced petiole elongation was studied in two species of the genus R u m e x. Analysis of endogenous GAs in the flooding-tolerant R u m e x pa/ustris Sm. and the intolerant R u m e x acetosa L. by gas chromatographvmass spectrometry showed for both species the presence of GA], G A 4, G A 9, G A 19, G A 20 and G A 53. Gas chromatography-mass spectrometry analysis of R. palusiris petiole tissue of submerged plants showed an increase in levels of 13-OH GAs, especially G A h compared with drained plants. This effect could be mimicked by application of 5 f.tL L_l ethylene. In R. acetosa, no differences between levels of GAs in drained or submerged plants were found. In R. p a lu stris, both submergence and ethylene treatment sensitized petioles to exogenous gibberellic acid (GA3). In R. acetosa the effect was opposite, i.e. submergence and ethylene de-sensitized petioles to G A 3. Our results demonstrate the dual effect of ethylene in the submer gence response related to flooding tolerance, i.e. in the flooding-tolerant R. palustris ethylene causes an increased concentration of and sensitivity to GA with respect to petiole elongation while in the intolerant R. acetosa ethylene reduces growth independent of GAs.

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Section: Discussionsupporting

confidence: 56%

Ethylene enhances gibberellin levels and petiole sensitivity in flooding-tolerant Rumex palustris but not in flooding-intolerant R. acetosa

Rijnders

Yang

Kamiya

et al. 1997

Planta

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“…5;Horton and Samara koon 1982) or by removal of the lamina ( Fig. 5; Samara koon and Horton 1983). This inhibiting effect on elonga tion could be counteracted by application of 10"* ' M IAA or 1 0 M NAA, showing that the inhibition is auxinspecific and demonstrating the obligatory presence of auxin in submergence-elicited petiole elongation.…”

Section: Discussionmentioning

confidence: 95%

“…Ranunculus sceleratus petioles were detached according to Samarakoon and Horton (1983) by removing a leaf with fully expanded lamina and cutting off the petiole at 25 mm from the lamina. For drained conditions of de tached petioles with lamina attached, petioles were in serted through Parafilm, spread over a 100-nil beaker, into the test solution, thus leaving the lamina in air (cf.…”

Section: Experim Ents With Detached Petiolesmentioning

confidence: 99%

The contrasting role of auxin in submergence‐induced petiole elongation in two species from frequently flooded wetlands

Rijnders

Barendse

Blom

et al. 1996

Physiologia Plantarum

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The contrasting role of auxin in submergence-induced petiole elongation in two species from frequently flooded wetlands J a n G . H . M . R ijn d e rs , G e r a r d W. M. B a re n d se , C o rn e lis W. P. M . B lom a n d L a u r e n s A. C. J. V oesenek naphthylphthalamic acid (NPA) had no effect on petiole elongation. The elongation response after NAA or NPA treatment was comparable for plants in both submerged and drained conditions. Pre-ageing of detached petioles of Rumex paliistris for 3 h in light or in dark conditions had no effect on the submergence-induced elongation. In comparison to intact plants, detached petioles of Rumex paliistris, with or without lamina, did not show significant differences in responsiveness to IAA between drained or submerged conditions. This was in contrast to Ranunculus sceleratus where submergence caused a clear increase in responsiveness towards IAA. Removal of the lamina, the putative source of auxin, or treatment with NPA did not hinder the submergence-induced elongation of detached Rumex paliistris petioles, but severely inhibited elongation of detached Ranunculus sceleratus petioles. This inhibition could be restored by application of NAA, suggesting the specific involvement of auxin in the submergence response of Ranunculus sceleratus. It is concluded that, in contrast to Ranunculus sceleratus, auxin is probably not involved in the submergence-induced petiole elongation of Rumex paliistris.

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“…In volvement of indole-3-acetic acid (IAA), gibberellin (GA) and abscisic acid (ABA) in depth accommodation has been described for a number of amphibious species i.e. Callitriche platycarpa, Ranunculus sceleratus and Oryza saliva (Musgrave et al, 1972;Musgrave and Walters, 1973;Samarakoon and Horton, 1983;Suge, 1985;HoffmannBenning and Kende, 1992). However, for species of the genus Runie.w little is known of the role of other plant hormones other than ethylene in the process of depth accommodation.…”

Section: T H E R O L E O F H O R M O N E S a N D Lo W O X Y G E N In mentioning

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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Petiole growth in Ranunculus sceleratus: the role of growth regulators and the leaf blade

Cited by 20 publications

References 13 publications

Ethylene enhances gibberellin levels and petiole sensitivity in flooding-tolerant Rumex palustris but not in flooding-intolerant R. acetosa

Ethylene enhances gibberellin levels and petiole sensitivity in flooding-tolerant Rumex palustris but not in flooding-intolerant R. acetosa

The contrasting role of auxin in submergence‐induced petiole elongation in two species from frequently flooded wetlands

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

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