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Distribution Of 14c From Different Leaf Positions In Tassel Seeded Tunicate Corn Zea Mays L Plants And Normal Corn Plants At Two Different Stages Of Grain Development
Download Distribution Of 14c From Different Leaf Positions In Tassel Seeded Tunicate Corn Zea Mays L Plants And Normal Corn Plants At Two Different Stages Of Grain Development full books in PDF, epub, and Kindle. Read online Distribution Of 14c From Different Leaf Positions In Tassel Seeded Tunicate Corn Zea Mays L Plants And Normal Corn Plants At Two Different Stages Of Grain Development ebook anywhere anytime directly on your device. Fast Download speed and no annoying ads. We cannot guarantee that every ebooks is available!
Book Synopsis Distribution of 14C from Different Leaf Positions in Tassel-seeded Tunicate Corn (Zea Mays L.) Plants and Normal Corn Plants at Two Different Stages of Grain Development by : Ghislain Gendron
Download or read book Distribution of 14C from Different Leaf Positions in Tassel-seeded Tunicate Corn (Zea Mays L.) Plants and Normal Corn Plants at Two Different Stages of Grain Development written by Ghislain Gendron and published by . This book was released on 1970 with total page 222 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Maize Cobs and Cultures: History of Zea mays L. by : John Staller
Download or read book Maize Cobs and Cultures: History of Zea mays L. written by John Staller and published by Springer Science & Business Media. This book was released on 2009-12-02 with total page 266 pages. Available in PDF, EPUB and Kindle. Book excerpt: Our perceptions and conceptions regarding the roles and importance of maize to ancient economies is largely a product of scientific research on the plant itself, developed for the most part out of botanical research, and its recent role as one of the most important economic staples in the world. Anthropological research in the early part of the last century based largely upon the historical particularistic approach of the Boasian tradition provided the first evidence that challenged the assumptions about the economic importance of maize to sociocultural developments for scholars of prehistory. Subsequent ethnobotanic and archaeological studies showed that the role of maize among Native American cultures was much more complex than just as a food staple. In Maize Cobs and Cultures, John Staller provides a survey of the ethnohistory and the scientific, botanical and biological research of maize, complemented by reviews on the ethnobotanic, interdisciplinary and multidisciplinary methodologies.
Book Synopsis Biotechnology and Ecology of Pollen by : David L. Mulcahy
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.
