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Desiccation resistance of adhesive secretion in the protocarnivorous plant Roridula gorgonias as an adaptation to periodically dry environment

Abstract

To analyse the change of mass in the resinous secretion of Roridula gorgonias, we carried out long-term measurements using a computerised ultra microbalance. In contrast to the aqueous mucilage of other carnivorous flypaper traps, this water-insoluble secretion does not desiccate even in dead and formalin-preserved plants. We found no significant desiccation of secretory drops within 10 h of continuous weighing. After 100 days of the secretion exposure to dry conditions, only about 8% of the mass was lost. Interestingly, returning these samples to humid conditions resulted in a mass recovery to the initial amount. This property of the secretion is discussed as an ecological adaptation to the periodically dry Fynbos habitat of the plant.

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References

  1. Bruce AN (1907) On the distribution, structure, and function of the tentacles of Roridula. Notes R Bot Gard Edinb 17:83–98

    Google Scholar 

  2. Cowling RM, Richardson D, Patterson-Jones C (1995) Fynbos: South Africa’s Unique Floral Kingdom. Fernwood Press, 156 pp

  3. Croteau R, Johnson MA (1984) Biosynthesis of terpenoids in glandular trichomes. In: Rodriguez E, Healey PL, Mehta I (eds) Biology and chemistry of plant trichomes. Plenum Press, New York, pp 133–186

    Google Scholar 

  4. Dell B (1977) Distribution and function of resins and glandular hairs in Western Australian plants. J R Soc West Aust 59:119–123

    Google Scholar 

  5. Dell B, McComb AJ (1978) Plant resins—their formation, secretion and possible functions. Adv Bot Res 6:277–316

    CAS  Article  Google Scholar 

  6. Dolling WR, Palmer JM (1991) Pameridea (Hemiptera: Miridae): predaceous bugs specific to the highly viscid plant genus Roridula. Syst Ent 16:319–328

    Google Scholar 

  7. Ellis AG, Midgley JJ (1996) A new plant-animal mutualism involving a plant with sticky leaves and a resisdent hemipteran insect. Oecologia 106:478–481

    Article  Google Scholar 

  8. Habenicht G (2002) Kleben: Grund, Technologien, Anwendung, 4th edn. Springer, Berlin, p 921

    Google Scholar 

  9. Hartmeyer S (1998) Carnivory in Byblis revisited II: the phenomenon of symbiosis on insect trapping plants. Carnivor Plant Newsl 27:110–113

    Google Scholar 

  10. Lloyd FE (1934) Is Roridula a carnivorous plant? Can J Res 10:780–786

    Google Scholar 

  11. Lloyd FE (1942) The carnivorous plants. The Ronald Press Company, New York, p 352

    Google Scholar 

  12. Manning J (2007) Field guide to Fynbos. New Holland Publishers, Australia, 507 pp

  13. Marloth R (1903) Some recent observations on the biology of Roridula. Ann Bot 17:151–158

    Google Scholar 

  14. Marloth R (1910) Further observations on the biology of Roridula. Trans R Soc South Afr 2:59–62

    Article  Google Scholar 

  15. Marloth R (1925) Flora of South Africa. Cambridge University Press, London, vol 2, Part I, pp 26–30

  16. Schnepf E (1969) Sekretion und Exkretion bei Pflanzen. Protoplasmatologia, Handbuch der Protoplasmaforschung, Bd. 8, Physiologie des Protoplasmas. Springer, New York, p 181

    Google Scholar 

  17. Simoneit BRT, Medeiros PM, Wollenweber E (2008) Triterpenoids as major components of the insect-trapping glue of Roridula species. Z Naturforsch 63c:625–630

    Google Scholar 

  18. Voigt D, Gorb S (2008) An insect trap as habitat: cohesion-failure mechanism prevents adhesion of Pameridea roridulae bugs to the sticky surface of the plant Roridula gorgonias. J Exp Biol 211:2647–2657

    Article  PubMed  Google Scholar 

  19. Voigt D, Gorb S (2010) Locomotion in a sticky terrain. Arthropod Plant Interact 4:69–79

    Article  Google Scholar 

  20. Voigt D, Gorb E, Gorb S (2009) Hierarchical organisation of the trap in the protocarnivorous plant Roridula gorgonias (Roridulaceae). J Exp Biol 212:3184–3191

    Article  PubMed  Google Scholar 

  21. Wollenweber E (2007) Flavonoids occuring in the sticky resin on Roridula dentata and Roridula gorgonias (Roridulaceae). Carniv Plant Newslett 36:77–80

    Google Scholar 

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Acknowledgments

Klaus Keller (Augsburg, Germany) kindly provided plants, bugs, and valuable discussions. Victoria Kastner (Max-Planck Institute of Metals Research, Stuttgart, Germany) helped with linguistic corrections of the manuscript. This study was partly supported by the Federal Ministry of Education and Research, Germany (BMBF, project InspiRat 01RI0633D) to SG.

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Correspondence to Dagmar Voigt.

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Voigt, D., Gorb, S. Desiccation resistance of adhesive secretion in the protocarnivorous plant Roridula gorgonias as an adaptation to periodically dry environment. Planta 232, 1511–1515 (2010). https://doi.org/10.1007/s00425-010-1270-2

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Keywords

  • Adhesive secretion
  • Desiccation
  • Glandular trichomes
  • Plant resin
  • Terpenoids
  • Ultra microbalance