Download or read book Proceedings written by and published by . This book was released on 1975 with total page 334 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book The Cumulative Book Index written by and published by . This book was released on 1967 with total page 1888 pages. Available in PDF, EPUB and Kindle. Book excerpt: A world list of books in the English language.

Download or read book The National Union Catalogs 1963 written by and published by . This book was released on 1964 with total page 632 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Bericht ber das III Internationale Symposium f r Best ubung written by and published by . This book was released on 1975 with total page 332 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book The British National Bibliography written by Arthur James Wells and published by . This book was released on 1973 with total page 2374 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Plant Taxonomic Literature in Australian Libraries written by Alison McCusker and published by CSIRO Publishing. This book was released on 1978 with total page 532 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book The British National Bibliography Cumulated Subject Catalogue written by and published by . This book was released on 1970 with total page 1128 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book The British National Bibliography written by and published by . This book was released on 1965 with total page 1354 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Insect Pollination of Cultivated Crop Plants written by Samuel Emmett McGregor and published by . This book was released on 1976 with total page 428 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Grass Systematics and Evolution written by and published by . This book was released on 1987 with total page 534 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book International Apicultural Congress written by and published by . This book was released on 1969 with total page 680 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Annotated Bibliographies Plant Series written by and published by . This book was released on 1977 with total page 202 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book World Perspectives in Apiculture written by Eva Crane and published by . This book was released on 1985 with total page 194 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Pollination Biology written by Dharam P. Abrol and published by Springer Science & Business Media. This book was released on 2011-10-05 with total page 812 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book has a wider approach not strictly focused on crop production compared to other books that are strictly oriented towards bees, but has a generalist approach to pollination biology. It also highlights relationships between introduced and wild pollinators and consequences of such introductions on communities of wild pollinating insects. The chapters on biochemical basis of plant-pollination interaction, pollination energetics, climate change and pollinators and pollinators as bioindicators of ecosystem functioning provide a base for future insights into pollination biology. The role of honeybees and wild bees on crop pollination, value of bee pollination, planned honeybee pollination, non-bee pollinators, safety of pollinators, pollination in cages, pollination for hybrid seed production, the problem of diseases, genetically modified plants and bees, the role of bees in improving food security and livelihoods, capacity building and awareness for pollinators are also discussed.

Download or read book Current Catalog written by National Library of Medicine (U.S.) and published by . This book was released on with total page 1568 pages. Available in PDF, EPUB and Kindle. Book excerpt: First multi-year cumulation covers six years: 1965-70.

Download or read book Status of Pollinators in North America written by National Research Council and published by National Academies Press. This book was released on 2007-05-13 with total page 327 pages. Available in PDF, EPUB and Kindle. Book excerpt: Pollinators-insects, birds, bats, and other animals that carry pollen from the male to the female parts of flowers for plant reproduction-are an essential part of natural and agricultural ecosystems throughout North America. For example, most fruit, vegetable, and seed crops and some crops that provide fiber, drugs, and fuel depend on animals for pollination. This report provides evidence for the decline of some pollinator species in North America, including America's most important managed pollinator, the honey bee, as well as some butterflies, bats, and hummingbirds. For most managed and wild pollinator species, however, population trends have not been assessed because populations have not been monitored over time. In addition, for wild species with demonstrated declines, it is often difficult to determine the causes or consequences of their decline. This report outlines priorities for research and monitoring that are needed to improve information on the status of pollinators and establishes a framework for conservation and restoration of pollinator species and communities.

Download or read book Biotechnology and Ecology of Pollen written by David L. Mulcahy and published by Springer. This book was released on 2011-11-11 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: In Recognition of the Forgotten Generation D. L. MULCAHyl Pollen was long believed to serve primarily a single function, that of delivering male gametes to the egge A secondary and generally overlooked value of pollen is that it serves to block the transmission of many defective alleles and gene combinations into the next generation. This latter function comes about simply because pollen tubes carrying defective haploid genotypes frequently fail to complete growth through the entire length of the style. However, the beneficial consequences of this pollen selection are diluted by the fact that the same deleterious genotypes are often transmitted through the egg at strictly mendelian frequencies (Khush, 1973). Gene expression in the pollen might thus at least appear to be a phenomenon of trivial consequence. Indeed, Heslop-Harrison (1979) rightly termed the gametophytic portion of the angiosperm life cycle, the "forgotten generation." This neglect, however, came about despite subtle but constant indications that pollen is the site of intense gene activity and selection. For example, Mok and Peloquin (1975) demonstrated that relatively heterozygous diploid pollen shows heterotic characteristics whereas relatively homozygous diploid pOllen does not. This was proof positive that genes are expressed (that is, transcribed and translated) in the pollen. 1 Department of Botany, University of Massachusetts Amherst, MA 01003, USA viii However, the implications for pollen biology of even this recent and well known study were not widely recognized.