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Reproductive success, spontaneous embryo abortion, and genetic load in flowering plants
PERS was found to be inextricably linked to outcrossing plants, whose breeding systems promote genetic variability, and the traditional concept of a positive growth regulator feedback system based on the number of surviving ovules in an ovary can account for subsequent fruit survivorship. Expand
Ovule survivorship, brood size, life history, breeding systems,and reproductive success in plants
  • D. Wiens
  • Biology, Medicine
  • Oecologia
  • 1 September 1984
Among perennials, increased exposure to predators and pathogens is suggested as the best explanation for the evolution of breeding systems favoring genetic recombination, that appear to be responsible for the lower S/O ratios in perennials. Expand
Mimicry in Plants
Mimetic phenomena have played a central role in many evolutionary questions and today provide some of the best examples of natural selection. Since its discovery by Bates (1862) in AmazonianExpand
Nonflying mammal pollination of southern african proteas: A non-coevolved system
That small mammals can effect pollination is indicated by their foraging behavior on flowering heads while in captivity, the morphological "fit" between individual florets and the rostra of small mammals, and by selective exclosure experiments that reduced seed set when small mammals were excluded and visitation was limited to insects. Expand
Are seed set and speciation rates always low among species that resprout after fire, and why?
It is suggested that marked xenogamy-longevity in association with frequent axillary branching via copious stored buds within R might favour expression among their genets and ramets of beneficial somatic mutations present in their meristematic tissues. Expand
The classification of the generic segregates of Phrygilanthus (= Notanthera) of the Loranthaceae
Analyses of floral morphology, inflorescence structure, life form, fruit type, and especially chromosome numbers indicate that Phrygilanthus is a highly heterogeneous and artificial assemblage containing elements now referable to the following ten genera: Cecarria, Desmaria, Gaiadendron, Ligaria, Muellerina, Notanthera, Psittacanthus, Struthanthus, Tripodanthus, andTristerix. Expand