Conservation implications of the reproductive ecology of Agalinis acuta (Scrophulariaceae)

Reproductive ecology of Agalinis acuta was investigated by examining potential for self-fertilization heroic and at anthesis, reproductive output from outcrossed vs, selfed matings. and effects, of browsing, plant size, and conspecific plant density on seed quid fruit production. These features of a plant species can provide indirect information pertinent to conservation such is patterns and maintenance of genetic diversity, risk associated with inbreeding depression, and changes in pollinator abundance or effectiveness. The species is self-compatible, with 97% of selfed flowers setting fruits pollinators were not required for reproduction. However, seed set in self-pollinated fruits averaged 17-20% less than that in open-pollinated fruits. Geitonogamous and facilitated selling are possible throughout anthesis and autonomous selfing is possible late in anthesis as corollas abscise. Delaying;elf-pollination until after outcrossing opportunities likely limits selfing rates and thus reduces risks associated with inbreeding but allows reproduction in absence of pollinators, Supplementing pollen on open-pollinated flowers yielded no additional seed set over controls, Neither early-season browsing of primary stems nor conspecific plant density had significant effects, on number of fruit,, per Plant, on fruit size, or on number of seeds from open-pollinated flowers. Currently, reproduction appears, to be high (about 2400 seeds/plant), and future risks due to lack of genetic diversity are likely low.