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Female gamete competition in an ancient angiosperm lineage.
Bachelier JB, Friedman WE. Bachelier JB, et al. Proc Natl Acad Sci U S A. 2011 Jul 26;108(30):12360-5. doi: 10.1073/pnas.1104697108. Epub 2011 Jun 20. Proc Natl Acad Sci U S A. 2011. PMID: 21690400 Free PMC article.
In Trimenia moorei, an extant member of the ancient angiosperm clade Austrobaileyales, we found a remarkable pattern of female gametophyte (egg-producing structure) development that strikingly resembles that of pollen tubes and their intrasexual competition within the mate …
In Trimenia moorei, an extant member of the ancient angiosperm clade Austrobaileyales, we found a remarkable pattern of female gameto …
Developmental selection within the angiosperm style: using gamete DNA to visualize interspecific pollen competition.
Williams JH Jr, Friedman WE, Arnold ML. Williams JH Jr, et al. Proc Natl Acad Sci U S A. 1999 Aug 3;96(16):9201-6. doi: 10.1073/pnas.96.16.9201. Proc Natl Acad Sci U S A. 1999. PMID: 10430920 Free PMC article.
We exploited the 3-fold difference in ploidy level between these two species to determine the paternity of individual pollen tubes growing within female reproductive tissues. ...We detected strong, early postpollination barriers such as pollen tube incompatibility,
We exploited the 3-fold difference in ploidy level between these two species to determine the paternity of individual pollen tubes gr
A developmental and evolutionary analysis of embryology in Platanus (platanaceae), abasal eudicot.
Floyd SK, Lerner VT, Friedman WE. Floyd SK, et al. Am J Bot. 1999 Nov;86(11):1523-37. Am J Bot. 1999. PMID: 10562244
We conducted an embryological study of Platanus racemosa in order to provide critical data on defining angiosperm reproductive characters for this important group. ...
We conducted an embryological study of Platanus racemosa in order to provide critical data on defining angiosperm reproductive charac
The origin and early evolution of tracheids in vascular plants: integration of palaeobotanical and neobotanical data.
Friedman WE, Cook ME. Friedman WE, et al. Philos Trans R Soc Lond B Biol Sci. 2000 Jun 29;355(1398):857-68. doi: 10.1098/rstb.2000.0620. Philos Trans R Soc Lond B Biol Sci. 2000. PMID: 10905614 Free PMC article. Review.
Comparative embryology of basal angiosperms.
Friedman WE. Friedman WE. Curr Opin Plant Biol. 2001 Feb;4(1):14-20. doi: 10.1016/s1369-5266(00)00129-1. Curr Opin Plant Biol. 2001. PMID: 11163162 Review.
As we begin to understand the early evolution of endosperm developmental patterns in flowering plants, it is apparent that we know little about the other basic embryological features of basal angiosperms, such as the nature of the female gametophyte and even whether …
As we begin to understand the early evolution of endosperm developmental patterns in flowering plants, it is apparent that we
Perspective: the origin of flowering plants and their reproductive biology--a tale of two phylogenies.
Friedman WE, Floyd SK. Friedman WE, et al. Evolution. 2001 Feb;55(2):217-31. doi: 10.1111/j.0014-3820.2001.tb01288.x. Evolution. 2001. PMID: 11308081 Review.
As an example of the complex and often unpredictable interplay of phylogenetic and comparative biology, we analyze the evolution of double fertilization, a process that forms a diploid embryo and a triploid endosperm, the embryo-nourishing tissue unique to flowering plants …
As an example of the complex and often unpredictable interplay of phylogenetic and comparative biology, we analyze the evolution of d …
Identification of diploid endosperm in an early angiosperm lineage.
Williams JH, Friedman WE. Williams JH, et al. Nature. 2002 Jan 31;415(6871):522-6. doi: 10.1038/415522a. Nature. 2002. PMID: 11823859
Here we report diploid biparental endosperm in Nuphar polysepalum, a basal angiosperm. We show that diploid endosperms are common among early angiosperm lineages and may represent the ancestral condition among flowering plants. ...
Here we report diploid biparental endosperm in Nuphar polysepalum, a basal angiosperm. We show that diploid endosperms are com …
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