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Resource Availability Affects Investment in Carnivory in Drosera rotundifolia

The New phytologist, 2003-08, Vol.159 (2), p.507-511 [Peer Reviewed Journal]

Copyright 2003 New Phytologist ;ISSN: 0028-646X ;ISSN: 1469-8137 ;EISSN: 1469-8137 ;DOI: 10.1046/j.1469-8137.2003.00816.x ;PMID: 33873350

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Title:
Resource Availability Affects Investment in Carnivory in Drosera rotundifolia
Author: Thorén, L. Magnus ; Tuomi, Juha ; Kämäräinen, Terttu ; Laine, Kari
Subjects: Biologi ; Biological Sciences ; carbon ; carbon/nutrient balance theory ; Carnivores ; carnivorous plant ; Carnivorous plants ; Drosera (sundew) ; Drosera rotundifolia ; Ecology ; Ekologi ; Flower buds ; inorganic nutrients ; Insectivorous plants ; leaf stickiness ; Leaves ; Natural Sciences ; Naturvetenskap ; Nitrogen ; nutrient balance theory ; Phosphorus ; Plant growth ; Plant nutrition ; Plants ; prey capture ; shade
Is Part Of: The New phytologist, 2003-08, Vol.159 (2), p.507-511
Description: • Carnivory in plants is restricted to nutrient-poor and open habitats presumably because of high benefits and/or low costs of carnivory in these conditions. Carnivory is costly because the plants need specific adaptations to capture prey. Drosera rotundifolia produces sticky substances on its leaf surface to catch prey. These substances are primarily carbon-based, and their production can be expected to be lower in shade. The benefit of carnivory is in terms of the increased nutritional gain which will be low when inorganic nutrients are available in the growth medium. We expected that investment in carnivory would be lower in shade and nutrient-rich conditions. • A factorial experiment involving shading and the addition of inorganic nutrients confirmed these predictions in the carnivorous, perennial herb D. rotundifolia. • Plants growing in shade or in media with nutrients added had less sticky leaves and had reduced their investment in carnivory. • Interestingly, the observed changes in the stickiness of the leaves were in accord with the carbon/nutrient balance theory, whereas a carbon-based secondary compound, 7-methyljuglone, in the leaves did not respond to shading or nutrient addition.
Publisher: Oxford, UK: Blackwell Science
Language: English
Identifier: ISSN: 0028-646X
ISSN: 1469-8137
EISSN: 1469-8137
DOI: 10.1046/j.1469-8137.2003.00816.x
PMID: 33873350
Source: IngentaConnect

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Resource Availability Affects Investment in Carnivory in Drosera rotundifolia

Copyright 2003 New Phytologist ;ISSN: 0028-646X ;ISSN: 1469-8137 ;EISSN: 1469-8137 ;DOI: 10.1046/j.1469-8137.2003.00816.x ;PMID: 33873350

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