ALBERT

All Library Books, journals and Electronic Records Telegrafenberg

X
feed icon rss

Your email was sent successfully. Check your inbox.

An error occurred while sending the email. Please try again.

Proceed reservation?

Export
  • 1
    facet.materialart.
    Unknown
    Environment. Biodiversity update--progress in taxonomy (2002)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2002-10-12
    Description: Taxonomy and systematics underpin our ability to conserve and benefit from biodiversity in sustainable ways as envisaged under the Convention on Biological Diversity (CBD). Despite progress in phylogenetics towards reconstructing the "Tree of Life" and in biodiversity informatics, the fundamental documentation of species necessary to complete the inventory of life has lagged behind. It is argued that this reflects a lack of appreciation of the role played by species-level taxonomic information in underpinning conservation and sustainable use and under investment in the relevant institutions at the expense of supporting the centralised financial mechanism of the CBD.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Blackmore, Stephen -- New York, N.Y. -- Science. 2002 Oct 11;298(5592):365.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Royal Botanic Garden Edinburgh, Inverleith Row, Edinburgh, EH3 5LR, UK. s.blackmore@rbge.org.uk〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/12376687" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Biological Evolution ; Biological Specimen Banks ; *Classification ; Conservation of Natural Resources ; Costs and Cost Analysis ; *Databases, Factual ; Developed Countries ; Developing Countries ; *Ecosystem ; Financial Support ; International Cooperation ; Phylogeny ; Plants/classification
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
    Published by American Association for the Advancement of Science (AAAS)
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    PAPER CURRENT
  • 2
    Electronic Resource
    Electronic Resource
    Exine formation in the pollinium ofDendrobium (1994)
    Springer
    Protoplasma 179 (1994), S. 121-130 
    Details
    ISSN: 1615-6102
    Keywords: Exine patterning ; Tectal sheath ; Callose ; Sporopollenin ; Plasma membrane ; Dendrobium
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Summary The position of the callose wall is related to the position of the primexine matrix that forms around the peripheral tetrads during microspore development of the compound unit, the pollinium. We report a combined freeze-fracture and freeze-substitution study of the events associated with early exine development. Stage one of exine development is deposition of protosporopollenin that is probably synthesised by the microspore and secreted to the primexine matrix where it is polymerised. Enzymes for the polymerisation of the protosporopollenin may be synthesised by the microspores and then transported, via the endoplasmic reticulum, to the plasma membrane. Stage two of exine development follows callose dissolution and deposition of tapetally derived sporopollenin. Hence exine form and exine deposition inDendrobium appear to be the result of intimate cooperation between the microspore, the plasma membrane, the callose and the tapetum.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01403950
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 3
    Electronic Resource
    Electronic Resource
    Preliminary observations on the formation of the male germ unit inCatananche caerulea L. (Compositae: Lactuceae) (1987)
    Springer
    Protoplasma 138 (1987), S. 187-189 
    Details
    ISSN: 1615-6102
    Keywords: Catananche caerulea ; Compositae: Lactuceae ; Freezefracture and cytoplasmic maceration ; Male germ unit ; Scanning electron microscopy ; Sperm cells
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Summary We have used the freeze fracture and cytoplasmic maceration technique to study microsporogenesis inCatananche caerulea L. and here we present preliminary observations of the male germ unit (MGU)in situ. The technique has the advantage of enabling the complex structure of the MGU to be seen in a single fracture plane whereas previously this was only possible by the reconstruction of transmission electron micrographs of serial thin sections. The arrangement of the two generative cells and the vegetative nucleus closely resembles that described from other species includingPlumbago zeylanica.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01281028
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
Close ⊗
This website uses cookies and the analysis tool Matomo. More information can be found here...