Plant Growth Regulation

, Volume 62, Issue 3, pp 213–216 | Cite as

Preliminary characterization of floral response of Xerophyta humilis to desiccation, vernalisation, photoperiod and light intensity

  • Marleen Y. Myers
  • Jill M. Farrant
  • Laura C. RodenEmail author
SI Plant Desiccation Stress


Xerophyta humilis is a monocotyledonous resurrection plant found in arid and semi-arid summer rainfall areas of Southern Africa, which undergoes desiccation to survive periods of extreme drought. In order for X.humilis to thrive in their natural habitat, correct timing of the floral transition, coincident with wet periods of sufficient duration, is essential. In this study, the environmental cues involved in the regulation of the floral transition in X.humilis were analysed. No single parameter tested was sufficient to induce flowering, but it was found that flowering was promoted by a combination of a cool period experienced while plants were hydrated, followed by transfer to long-day photoperiods of relatively high light intensity. Plants retained competence to flower if desiccated during exposure to cold, but no flowering occurred if dried prior to this exposure. These data suggest that exposure to cold temperature facilitates vernalisation and subsequent exposure to high light and long days are inductive for floral initiation in X. humilis.


Xerophyta humilis Flowering Photoperiod Light intensity Vernalisation Cold sensing 



MYM received an NRF bursary; this study was supported by NRF funding to LCR and JMF. We are grateful to Keren Cooper for her assistance with plant maintenance; to Neil Bredekamp and Des Barnes for assistance with the controlled growth facilities.

Supplementary material

Supplementary material 1 (mpg 3,873 kb)


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Copyright information

© Springer Science+Business Media B.V. 2010

Authors and Affiliations

  • Marleen Y. Myers
    • 1
  • Jill M. Farrant
    • 1
  • Laura C. Roden
    • 1
    Email author
  1. 1.Department of Molecular and Cell BiologyUniversity of Cape TownRondebosch, Cape TownSouth Africa

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