Selected Papers On Floral Evolution I
DOWNLOAD
Download Selected Papers On Floral Evolution I PDF/ePub or read online books in Mobi eBooks. Click Download or Read Online button to get Selected Papers On Floral Evolution I book now. This website allows unlimited access to, at the time of writing, more than 1.5 million titles, including hundreds of thousands of titles in various foreign languages. If the content not found or just blank you must refresh this page
Selected Papers On Floral Evolution I
DOWNLOAD
Author : Elmar E. Leppik
language : de
Publisher:
Release Date : 1969
Selected Papers On Floral Evolution I written by Elmar E. Leppik and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1969 with Flowers categories.
Selected Papers On Floral Evolution
DOWNLOAD
Author : Elmar E. Leppik
language : de
Publisher:
Release Date : 1969
Selected Papers On Floral Evolution written by Elmar E. Leppik and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1969 with Flowers categories.
Selected Papers On Floral Evolution
DOWNLOAD
Author : Elmar E. Leppik
language : en
Publisher:
Release Date : 1974
Selected Papers On Floral Evolution written by Elmar E. Leppik and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1974 with Flowers categories.
Ecology And Evolution Of Flowers
DOWNLOAD
Author : Lawrence D. Harder
language : en
Publisher: OUP Oxford
Release Date : 2006-11-30
Ecology And Evolution Of Flowers written by Lawrence D. Harder and has been published by OUP Oxford this book supported file pdf, txt, epub, kindle and other format this book has been release on 2006-11-30 with Science categories.
The reproductive organs and mating biology of angiosperms exhibit greater variety than those of any other group of organisms. Flowers and inflorescences are also the most diverse structures produced by angiosperms, and floral traits provide some of the most compelling examples of evolution by natural selection. Given that flowering plants include roughly 250,000 species, their reproductive diversity will not be explained easily by continued accumulation of case studies of individual species. Instead a more strategic approach is now required, which seeks to identify general principles concerning the role of ecological function in the evolution of reproductive diversity. The Ecology and Evolution of Flowers uses this approach to expose new insights into the functional basis of floral diversity, and presents the very latest theoretical and empirical research on floral evolution. Floral biology is a dynamic and growing area and this book, written by the leading internationally recognized researchers in this field, reviews current progress in understanding the evolution and function of flowers. Chapters contain both new research findings and synthesis. Major sections in turn examine functional aspects of floral traits and sexual systems, the ecological influences on reproductive adaptation, and the role of floral biology in angiosperm diversification. Overall, this integrated treatment illustrates the role of floral function and evolution in the generation of angiosperm biodiversity. This advanced textbook is suitable for graduate level students taking courses in plant ecology, evolution, systematics, biodiversity and conservation. It will also be of interest and use to a broader audience of plant scientists seeking an authoritative overview of recent advances in floral biology.
Floral Biology
DOWNLOAD
Author : David G. Lloyd
language : en
Publisher: Springer Science & Business Media
Release Date : 2012-12-06
Floral Biology written by David G. Lloyd and has been published by Springer Science & Business Media this book supported file pdf, txt, epub, kindle and other format this book has been release on 2012-12-06 with Science categories.
Studies in floral biology are largely concerned with how flowers function to promote pollination and mating. The role of pollination in governing mating patterns in plant populations inextricably links the evolution of pollination and mating systems. Despite the close functional link between pollination and mating, research conducted for most of this century on these two fundamental aspects of plant reproduction has taken quite separate courses. This has resulted in suprisingly little cross-fertilization between the fields of pollination biology on the one hand and plant mating-system studies on the other. The separation of the two areas has largely resulted from the different backgrounds and approaches adopted by workers in these fields. Most pollination studies have been ecological in nature with a strong emphasis on field research and until recently few workers considered how the mechanics of pollen dispersal might influence mating patterns and individual plant fitness. In contrast, work on plant mating patterns has often been conducted in an ecological vacuum largely devoid of information on the environmental and demographic context in which mating occurs. Mating-system research has been dominated by population genetic and theoretical perspectives with surprisingly little consideration given to the proximate ecological factors responsible for causing a particular pattern of mating to occur.
Floral Evolution In Milkweeds
DOWNLOAD
Author : Raffica Jeanne La Rosa
language : en
Publisher:
Release Date : 2015
Floral Evolution In Milkweeds written by Raffica Jeanne La Rosa and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2015 with Asclepiadaceae categories.
Adaptation is an important process that allows species to utilize new habitats and to avoid extinction, contributing to the biodiversity we find on the planet. Many flowering plants rely on animals for pollination; the floral traits that are adaptive for pollination are those that influence attraction, rewards, or efficiency. Milkweeds (Asclepias) have unusual floral structures that consist of a gynostegium surrounded by five nectar-filled hoods. In many species, a horn develops from the inside base of each hood. Pollen grains are packaged into waxy packets (pollinia) and are positioned in the wall of the gynostegium. For fertilization, pollinia must be removed by pollinators and inserted into stigmatic openings in the wall of the gynostegium between adjacent hoods; pollination is carried out passively by a wide variety of pollinators that are almost entirely all insects. Milkweeds are hermaphroditic, so it is possible for the floral traits to be adaptive for male fitness, female fitness, or both. The floral diversity across Asclepias is astounding. My dissertation investigates if and how the floral structures are adaptive, and if the variation among species is the result of natural selection. I used two complementary approaches. For the first approach, I used contemporary measures of selection and functional studies to focus on the process of adaptation in five species of North American Asclepias. Selection works on intraspecific variation within traits and the effect of that variation on fitness. I also utilized paternity analyses in two species to measure selection through male fitness. For the second approach, I used phylogenetic methods to find signatures of past selection on traits across more than one hundred North American Asclepias species. Phylogenetic comparative methods focus on patterns of interspecific variation. I used tests of correlated evolution between pairs of traits, or traits and pollinators, to investigate functional relationships and possible selective agents. I also tested for convergent evolution, which can demonstrate adaptive evolution in response to a similar selective regime. The six floral traits I studied had an effect on fitness, suggesting they are adaptive. I found that many of the floral traits were under significant selection through only one gender, but that the direction of selection was similar across genders, showing little conflict between male and female function or between male and female fitness. I predicted that the size of the hood and gynostegium would influence pollinator attraction, but they were instead more likely to influence the efficiency of pollination. I also found no significant link between female pollination success and female reproductive success in four of the five species, so traits that increased pollen receipt did not in turn affect female fitness, which is consistent with fruit production not being limited by pollen receipt. Using measures of viable seeds produced (annual female fitness) and viable seeds sired (annual male fitness), I determined that selection estimated using total fruit number is a good estimate of selection through viable seeds produced; however, total pollinia removed per plant, a common estimate of male function and fitness in milkweeds is not a good predictor of viable seeds sired. My studies of the gynostegia, hoods, and horns across the phylogeny showed that horn loss likely followed the closure of hoods, suggesting a possible loss of horn function. There were also three convergent floral phenotypes; each may have evolved in response to similar selective regimes. The convergent species provide an excellent starting point for future investigations of possible selective agents.
Floral Evolution
DOWNLOAD
Author : Catherine Foxwell
language : en
Publisher: Hardie Grant Publishing
Release Date : 2022-04-28
Floral Evolution written by Catherine Foxwell and has been published by Hardie Grant Publishing this book supported file pdf, txt, epub, kindle and other format this book has been release on 2022-04-28 with Gardening categories.
Floral Evolution shows you how to use accessible flowers to make beautiful floral designs. Author Catherine Foxwell believes that the flowers and beautiful arrangements should be accessible to all, and this book takes you through some simple projects using sustainable techniques to achieve this. She uses readily available, inexpensive flowers in straightforward projects that teach you how to repurpose the bloom into four different displays. Chapters are broken down into Flowers for the Home, Flowers to Give, Flowers to Wear, Flowers for Celebration, Large Arrangements, DIY Wedding Flowers and Special Project. With this step-by-step, extremely accessible approach, anyone can arrange blooms like a pro.
Serials Currently Received By The National Agricultural Library 1974
DOWNLOAD
Author : National Agricultural Library (U.S.)
language : en
Publisher:
Release Date : 1974
Serials Currently Received By The National Agricultural Library 1974 written by National Agricultural Library (U.S.) and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1974 with Agriculture categories.
The Different Forms Of Flowers On Plants Of The Same Species
DOWNLOAD
Author : Charles Darwin
language : en
Publisher:
Release Date : 1888
The Different Forms Of Flowers On Plants Of The Same Species written by Charles Darwin and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1888 with Nature categories.
Floral Evolution
DOWNLOAD
Author : Frank M. Frey
language : en
Publisher:
Release Date : 2003
Floral Evolution written by Frank M. Frey and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2003 with categories.