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pro vyhledávání: '"Kurt B. Petersen"'
Autor:
Kurt B. Petersen, Elizabeth A. Kellogg
Publikováno v:
American Journal of Botany. 109:1331-1345
The awn of grasses is a long, conspicuous outgrowth of the floral bracts in a grass spikelet. It is known to impact agricultural yield, but we know little about its broader ecological function, nor the selective forces that lead to its evolution. Gra
Publikováno v:
Journal of Biogeography. 46:807-815
Autor:
Kurt B. Petersen, Martin Burd
Publikováno v:
Evolution. 72:1080-1091
Heterospory was a pivotal evolutionary innovation for land plants, but it has never been clear why it evolved. We used the geographic distributions of 114 species of the heterosporous lycophyte Selaginella to explore the functional ecology of microsp
Autor:
Martin Burd, Kurt B. Petersen
Publikováno v:
Annals of Botany. 121:377-383
Background and Aims The division of resource investment between male and female functions is poorly known for land plants other than angiosperms. The ancient lycophyte genus Selaginella is similar in some ways to angiosperms (in heterospory and in ha
Autor:
Martin Burd, Kurt B. Petersen
Publikováno v:
Biological Reviews. 92:1739-1754
The primitive land plant life cycle featured the production of spores of unimodal size, a condition called homospory. The evolution of bimodal size distributions with small male spores and large female spores, known as heterospory, was an innovation