Fruitset in Linnaea borealis along an altitud gradient in the subarctics

Updated 2003-04-22

Fruit set in Linnaea borealis is known to be low. Plausible reasons for low fruit/seed set in self-incompatible plants are: pollinator shortage, xenogamous-pollen shortage and environmental conditions. Preliminary results from a study Abisko 2001 suggest that fruit set in L. borealis is partly pollinator limited. Wilcock and Jennings (1999) concluded, however, that fruit set in some Scottish populations of L. borealis was xenogamous-pollen limited. In a study on Ranuculus acris in the Norwegian mountains it was shown that the physical environment (temperature and wind) together with pollen shortage limited seed set.Does fruit set vary among populations of L. borealis along an altitude gradient in Swedish Lapland? Is fruit set higher in the valley than on the mountains? If so, what is the reason behind it? A way to compensate for low pollinator activity could be to extend flowering time. Is flowering time longer at higher elevations? If so, is it due to selection pressure or just a cause of lower metabolic rate in harsher climate? Is there a lower pollinator activity on higher elevation than on lower? Who are the pollinators of L. borealis in Abisko and is it the same along the altitudinal gradient? Is L. borealis self-incompatible in Abisko as in Scotland?Wilcock C.C. and Jennings S.B. 1999. Partner limitation and restoration of sexual reproduction in the clonal dwarf shrub Linnaea borealis L. (Caprifoliaceae).

Time frame

Status
Completed
Project time span
2002 - 2002
Data collection
not specified
Data processing
not specified
Data reporting
not specified

Contact information

Contact person
Karin Bjerrner
Address
Avd. Växtekologi, EBC Villavägen 14 752 36 UPPSALA

Parameters and Media

Not specified

Geography

Regions studied
Abisko Scientific Research Station

Data availability

Samples/specimens archived in specimen banks?
No

Methods & Procedures

Not specified

Additional Information

Is this a bi- AND multi-lateral project (i.e. a project involving cooperation between different countries)?
No
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