Biotechnology and Ecology of Pollen PDF
By:David L. Mulcahy,Gabriella Bergamini Mulcahy,Ercole Ottaviano
Published on 2011-11-11 by Springer
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.
This Book was ranked at 14 by Google Books for keyword Ecology.
Book ID of Biotechnology and Ecology of Pollen's Books is bOdlMQEACAAJ, Book which was written byDavid L. Mulcahy,Gabriella Bergamini Mulcahy,Ercole Ottavianohave ETAG "WBJouBJY/lg"
Book which was published by Springer since 2011-11-11 have ISBNs, ISBN 13 Code is 9781461386247 and ISBN 10 Code is 1461386241
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