Mulcahy david l (8 Ergebnisse)

No Binding. Zustand: Very Good. ORIGINAL Article, disbound from journal; no covers; in very good condition. Journal.

Yellow hardback cloth cover. Zustand: Very Good. First Edition. VG : in very good condition without dust jacket as issued. A little marking and bumping to boards. Label of previous owner on fep. 250mm x 170mm (10" x 7"). xxvi, 528pp. 141 figures. Proceedings of the International Conference on the Biotechnology and Ecology of Pollen, 9 - 11 July 1985 University of Massachusetts, Amherst, MA, U.S.A.…

Softcover. Zustand: Very Good. No Dust Jacket. Paperwrap booklet. Address stamp to front cover. Item Type: Book. Category: Natural History & Resources; Botany; Please contact H4o Books if you require images or further information. Inventory No: 004120.

(S. A. Amer. J. Bot. 57, 9) 1970. S. 1027 - 1030. gr8. m. zahlr. Abb. (St.) geklammert -2) Sonderabdruck.

Zustand: New. In English.

Taschenbuch. Zustand: Neu. Druck auf Anfrage Neuware - Printed after ordering - 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.…

Paperback. Zustand: Brand New. 551 pages. 9.50x6.70x1.20 inches. In Stock.

Zusammen 27½ SS. auf 19 Bll. Meist Gr.-4to. Mit 5 eh. adr. Kuverts und einigen Beilagen (s. u.). Freundschaftliche Korrespondenz mit dem Genetiker und Molekularbiologen Hans Ferdinand Linskens (19212007) über berufliche und private Belange. Beiliegend ein ms. Brief seiner Frau Gabriella und 6 Photographien a. d. Umgebung von Alessandria (Italien). David L. Mulcahy ist emeritierter Professor für Botanik an der Universitat von Massachusetts Amherst. Der Br. v. 28. Oktober 1994 ohne Unterschrift, jedoch mit kleinem eh. Zusatz.…