NDLI: Infertile times: response to damage in genets of the clonal sedge Carex bigelowii

Content Provider	Springer Nature Link
Author	Bråthen, Kari Anne Junttila, Olavi
Copyright Year	2006
Abstract	Tolerance to grazing is a plant trait that can be adaptive in systems where plants are subjected to a diversity of herbivore attack types. To test the tolerance ability of the clonal sedge Carex bigelowii, which is food plant to several herbivores in alpine and arctic areas, and the potential fitness costs of this tolerance, replicated units of genets were subjected to three levels of damage throughout three consecutive seasons. The three levels of treatment were no damage, light damage and heavy damage, and the damage was conducted by tearing off all plant material at 3 and 0 cm above-ground respectively. The genets had no tolerance under damage in terms of sexual reproduction. In terms of clonal reproduction the genets showed tolerance under light damage but not under heavy damage. However, no fitness cost was found for this tolerance ability, i.e. genets had higher reproduction and growth under no damage. The average ramet weight had a similar decrease under both a low and high damage treatment. Changed partitioning of biomass between plant parts and reduced concentration of total non-structural carbohydrates (TNC) in storage organs are possible mechanisms for the ability to uphold clonal reproduction in response to damage. There were no significant indications that tolerance ability or its fitness cost differed between genets. Our results suggest that when subjected to heavy damage genets will only reproduce vegetatively. Consequently, it seems C. bigelowii has evolved to allocate resources to the survival of an already successful genet rather than to a potential new genet of unknown success.
Starting Page	83
Ending Page	95
Page Count	13
File Format	PDF
ISSN	13850237
Journal	Plant Ecology
Volume Number	187
Issue Number	1
e-ISSN	15735052
Language	English
Publisher	Kluwer Academic Publishers
Publisher Date	2006-03-29
Publisher Place	Dordrecht
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Clonal growth Grazing tolerance Integrated physiological units Quantitative genetics Rhizomatous sedge Sexual reproduction Soluble plant proteins Plant Sciences
Content Type	Text
Resource Type	Article
Subject	Ecology Plant Science

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