Publications

host species and habitat affect nodulation by specific frankia genotypes in two species of alnus in interior alaska.	alders (alnus spp.) are important components of northern ecosystems due to their ability to fix nitrogen (n) in symbiosis with frankia bacteria. availability of optimal frankia may be a contributing factor in limiting the performance and ecological effects of alnus, but the factors underlying distribution of alnus-infective frankia are not well understood. this study examined the genetic structure (nifd-k spacer rflp haplotypes) of frankia assemblages symbiotic with two species of alnus (a. tenu ...	2009	19352714
diversity of frankiae in soils from five continents.	clone libraries of nifh gene fragments specific for the nitrogen-fixing actinomycete frankia were generated from six soils obtained from five continents using a nested pcr. comparative sequence analyses of all libraries (n=247 clones) using 96 to 97% similarity thresholds revealed the presence of three and four clusters of frankiae representing the elaeagnus and the alnus host infection groups, respectively. diversity of frankiae was represented by fewer clusters (i.e., up to four in total) with ...	2009	19692194