Academic Staff

Laura Roden | Rhythm and Blooms Lab

Research | Publications | Collaborations | Lab members | Telephone: +27 21 650 5322 | Facsimile: +27 21 650 1861



We are the Rhythms and Blooms lab!

Our research interests are in circadian rhythms in plants and humans, and the photoperiodic control of developmental transitions in plants, including flowering time. In particular we are interested in the regulation of the circadian clock in plants and the role of histone modification in rhythms; the role of the circadian clock in defence responses; the regulation of the floral transition and dormancy through photoperiod; the effect of circadian rhythms on performance in sports; circadian disruption and obesity.

Lab Outing 2013

Selected publications

Plant circadian networks and responses to the environment. Muchapirei, C.I., Valentine, S.-L., Roden, L.C. Functional Plant Biology, in press 

Comparison between an African town and a neighbouring village shows delayed, but not decreased, sleep during the early stages of urbanisation.  Beale, A.D., Pedrazzoli, M., Gonçalves, B.S.B., Beijamini, F., Duarte, N.E., Egan, K.J., Knutson, K.L., von Schantz, M., Roden, L.C. (2017) Scientific Reports, 7: 5697 DOI:10.1038/s41598-017-05712-3

Chronotype distribution in professional rugby players: evidence for the environment hypothesis? Kunorozva, L, Rae, D.E., Roden, L.C. (2017) Chronobiology International, 34(6): 762-772 doi: 10.1080/07420528.2017.1322600

Impact of chronotype on athletic performance: current perspectives. Roden, L.C., Rudner, T.D., Rae, D.E. (2017) ChronoPhysiology and Therapy,7: 1–6

One night of partial sleep deprivation impairs recovery from a single exercise training session. Rae, D.E., Chin, T., Dikgomo, K., Hill, L.,  McKune, A.J., Kohn, T.A., Roden, L.C. (2017) European Journal of Applied Physiology, 117(4):699-712 DOI 10.1007/s00421-017-3565-5

Chronotype of South African adults is affected by solar entrainment. Shawa N. and Roden, L.C. (2016) Chronobiology International, 33(3):315-23

Sleep: A serious contender for the prevention of obesity and non-communicable disease. Rae, D.E., Ebrahim, I., Roden, L.C. (2016) Journal of Endocrinology, Metabolism and Diabetes of South Africa, 21(1):1–2 

Jasmonate signalling drives time-of-day differences in susceptibility of Arabidopsis to the fungal pathogen Botrytis cinerea. Ingle, R.A., Stoker, C., Stone, W., Adams, N., Smith, R., Grant, M., Carré, I., Roden, L.C. and Denby, K.J. (2015) Plant Journal, 84, 937-948 DOI: 10.1111/tpj.13050

A chronotype comparison of South African and Dutch marathon runners: the role of scheduled race start times and effects on performance. Henst, R., Jaspers, R., Roden, L.C. and Rae, D.E. (2015) Chronobiology International, 32(6), 858–868

Protea hybrid 'Carnival' (P. compacta x P. neriifolia) expresses multiple copies of a LEAFY homologue involved in floral and vegetative development. Smart, M. and Roden, L.C.  (2015) South African Journal of Botany 98, 52-63

Factors to consider when assessing diurnal variation in sports performance - the influence of chronotype and habitual training time-of-day. Rae, D.E., Stephenson, K.J., and Roden, L.C. (2015) European Journal of Applied Physiology 115, 1339–1349 

Perception of effort in morning-type cyclists is lower when exercising in the morning. Kunorozva, L., Roden,L.C., Rae, D.E. (2014)  Journal of Sports Sciences 32(10), 917-925 doi:10.1080/02640414.2013.873139

Circadian regulation of plant immunity to pathogens (2014) Ingle, R.A., Roden, L.C. in Dorothee Staiger (ed.), Plant Circadian Networks: Methods and Protocols, Methods in Molecular Biology, vol. 1158, pp273-283 DOI 10.1007/978-1-4939-0700-7_18,  Springer Science+Business Media New York 

Initiation of flowering in Protea compacta x Protea neriifolia hybrid ‘Carnival’ coincides with expression of FLOWERING LOCUS T homologue. Smart, M., Roden, L.C. (2014) Plant Molecular Biology Reporter 32, 372–381 DOI 10.1007/s11105-013-0657-1

Chronotype and PERIOD3 variable number tandem repeat polymorphism in individual sports athletes. Kunorozva, L., Stephenson, K.J.,  Rae, D.E., Roden, L.C. (2012) Chronobiology International 29, 1004-1010


Dr Dale Rae (Human Biology, UCT)
Dr Rob Ingle (Molecular and Cell Biology, UCT)
Prof Malcolm von Schantz (Faculty of Health and Medical Sciences, University of Surrey, UK)

Lab members

Rageema Joseph - PhD | Clock regulated immunity in Arabidopsis thaliana. (co-supervised by Dr Rob Ingle, MCB, UCT)

Chenjerai Muchapirei - PhD | Clock regulated immunity in Arabidopsis thaliana. (co-supervised by Dr Rob Ingle, MCB, UCT)

Nyambura Shawa - PhD | (co-supervised with Dr Dale Rae Exercise Science and Sports Medicine Research Unit)

Rob Henst - PhD | Sleep extension and weight loss (co-supervised with Dr Dale Rae, Exercise Science and Sports Medicine Research Unit) 

Paula Pienaar - PhD | Associations between sleep, workplace productivity and cardiometabolic disease risk factors in executive employees

Shannon-Leigh Valentine - MSc | Clock regulated immunity in Arabidopsis thaliana. (co-supervised by Dr Rob Ingle, MCB, UCT)

Hendriena Victor - MSc(Med) | Investigating the interplay between circadian rhythms, sleep and non-communicable disease risk factors in South African female shift workers. (co-supervised with Dr Dale Rae, Exercise Science and Sports Medicine Research Unit) 

Denford Banga - MSc | DNA methylation in obesity in a South African population. (co-supervised with Dr Dale Rae, Exercise Science and Sports Medicine Research Unit)