Fluid properties influence diet in Nepenthes pitcher plants
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Fluid properties influence diet in Nepenthes pitcher plants

Fluid from pitchers of four Nepenthes species is studied to determine retention capacity and time-to-kill for different species of ants and flies.

Fluid properties influence diet in <i>Nepenthes</i> pitcher plants
Fluid properties influence diet in Nepenthes pitcher plants

The acidic fluid present in the traps of Nepenthes pitcher plants has a primary function of digesting prey, but also plays a role in the capture of insects. Bazile et al. collect fluid in the field from pitchers of four Nepenthes species and determine retention capacity and time-to-kill for different species of ants and flies under controlled conditions. They find that both the pH and viscoelasticity properties of the fluid influence a plant’s diet and its carnivorous status. Thus the plants may select the prey that they retain by manipulating the secretion of H+ ions and polysaccharides in their pitcher fluid, which has implications for potential adaptive radiation of this genus with regard to the nutrient sequestration strategies of different species in various habitats.

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The Annals of Botany Office is based at the University of Oxford.

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