A method to record circadian plant movements, with application to Oxalis leaf rhythms

Pedersen, Marit; Eidesmo, T.; Johnsson, Anders

doi:10.1034/j.1399-3054.1992.840404.x

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“…The light scattering and piping properties of plant tissues are well documented [21]. The inference of intercellular signalling on the basis of localised illumination [22] therefore requires additional controls, which we obviated by using localised dark treatments. Tobacco plantlets carrying the PHYB-LUC reporter were imaged while foil covers were applied to create three LD (12,12) treatments in antiphase to the preceding cycles, except for one leaf that remained in LL (Figure 4).…”

Section: Resultsmentioning

confidence: 99%

Functional independence of circadian clocks that regulate plant gene expression

2000

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Section: Resultsmentioning

confidence: 99%

Functional independence of circadian clocks that regulate plant gene expression

2000

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Short period leaf movements in Oxalis regnellii

Pedersen¹,

Johnsson²,

Mæhle³

et al. 1993

Physiologia Plantarum

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Oxalis regnellii Mig. is a trifoliate plant, and the three leaflets usually show synchronized up and down movements with a circadian period of 26–27 h. The three leaflets can also perform desynchronized ultradian oscillations, and we report on such rhythms under different conditions. A study of the occurrence of ultradian leaf movement rhythms as a function of irradiance is presented. At an irradiance of approximately 1 μW cm−2, the occurrence was maximal and ca 30%. The periods varied from 5 to 15 h. Four other cases of ultradian rhythms in different conditions are also presented. In one case spontaneous ultradian rhythms occurred, and in another, two of the leaflets showed ultradian rhythms when the third leaflet had received a light pulse. In two more cases, the three leaflets on a leaf were separated by physical cuts along the petiole between the pulvini; in both cases the period was approximately 5 h. Possible mechanisms to explain the ultradian rhythms in Oxalis regnelli are discussed.

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A method to record circadian plant movements, with application to Oxalis leaf rhythms

Cited by 2 publications

References 0 publications

Functional independence of circadian clocks that regulate plant gene expression

Functional independence of circadian clocks that regulate plant gene expression

Short period leaf movements in Oxalis regnellii

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