If you need an accessible version of this item please contact JSTOR User Support

The Role of Carnivory in the Growth and Reproduction of Drosera filiformis and D. rotundifolia

Cairn C. Krafft and Steven N. Handel
Bulletin of the Torrey Botanical Club
Vol. 118, No. 1 (Jan. - Mar., 1991), pp. 12-19
Published by: Torrey Botanical Society
DOI: 10.2307/2996970
Stable URL: http://www.jstor.org/stable/2996970
Page Count: 8
  • Download PDF
  • Cite this Item

You are not currently logged in.

Access your personal account or get JSTOR access through your library or other institution:

login

Log in to your personal account or through your institution.

If you need an accessible version of this item please contact JSTOR User Support
The Role of Carnivory in the Growth and Reproduction of Drosera filiformis and D. rotundifolia
Preview not available

Abstract

A greenhouse experiment determined the effects of differential feeding treatments on the growth and reproduction of two North American species of sundew, Drosera filiformis Raf. and D. rotundifolia L. Plants were fed 0, 5, 10, or 20 fruit flies (Drosophila melanogaster) per week for 7 or 8 weeks during the growing season. For both species feeding enhanced growth during the feeding period. In the growing season following the feeding treatments, D. rotundifolia showed carryover of the effect of feeding treatment on growth; D. filiformis did not. Effects of feeding were more pronounced for reproduction than for growth. Plants that had been fed 10 or 20 flies per week produced more flower stalks than unfed plants. Feeding also increased the number of flowers and reproductive dry weight. Effects of feeding treatment on percent reproductive effort were not significant, perhaps because of high variability and limited sample size. Carnivory is of immediate benefit in low-nutrient environments and can also have longer term effects on both growth and reproduction. Controlled experimental feeding may be applied to future questions of carnivorous plant performance under interspecific competition.

Page Thumbnails

  • Thumbnail: Page 
12
    12
  • Thumbnail: Page 
13
    13
  • Thumbnail: Page 
14
    14
  • Thumbnail: Page 
15
    15
  • Thumbnail: Page 
16
    16
  • Thumbnail: Page 
17
    17
  • Thumbnail: Page 
18
    18
  • Thumbnail: Page 
19
    19