Host provenance effects on germination and establishment of two New Zealand mistletoes (Loranthaceae)
Article first published online: 23 SEP 2002
Volume 16, Issue 5, pages 657–663, October 2002
How to Cite
Norton, D. A., Ladley, J. J. and Sparrow, A. D. (2002), Host provenance effects on germination and establishment of two New Zealand mistletoes (Loranthaceae). Functional Ecology, 16: 657–663. doi: 10.1046/j.1365-2435.2002.00663.x
- Issue published online: 23 SEP 2002
- Article first published online: 23 SEP 2002
- Received 4 February 2001; accepted 8 February 2002
- Alepis flavida;
- Peraxilla tetrapetala
- 1The influence of host genotypes (provenances) on mistletoe establishment, or the susceptibility of different host provenances to mistletoe infection, has not previously been documented.
- 2We quantified the germination and establishment of two New Zealand mistletoes [Alepis flavida (Hook. f.) Tiegh. and Peraxilla tetrapetala (L. f.) Tiegh.] on different provenances of their main host Nothofagus solandri (Hook. f.) Oerst. in a ‘common garden’ host experiment.
- 3Germination was high for both species (96·9% for A. flavida and 97·4% for P. tetrapetala), but establishment was much lower (13·2 and 2·3%, respectively).
- 4Deviance explained in statistical models of germination with respect to light, branch growth rate, host tree provenance and tree effects was lower than that explained in models of establishment (20·3 compared with 33·2% for A. flavida; 35·9 compared with 73·7% for P. tetrapetala).
- 5While branch growth rate and host tree provenance were significant variables in the P. tetrapetala establishment model, the most significant effect for both species was due to individual trees within provenances (24·9 and 42·8% of total deviance, respectively, for A. flavida and P. tetrapetala).
- 6Even when a range of factors are accounted for (including branch growth rate and host tree provenance), there is still a large degree of unpredictability in mistletoe establishment that reflects either inherent or environmental conditions associated with individual trees.