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1992 (1)
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1982 (1)
1Author    E. Bengsch, J. Polster, M. SchwenkRequires cookie*
 Title    Effects of Simultaneous Supply of Silicon and Boron on Plant Growth and on Herbicide Toxicity  
 Abstract    An optimal supply of biodisposable silicon and boron shows a synergistic stimulation effect on plant growth. U nder these optim al growth conditions herbicides may become particularly toxic for cultural plants. Plants inhibited by herbicides show distinctly higher boron contents than that of untreated samples. 
  Reference    Z. Naturforsch. 44c, 781—786 (1989); received April 24 1989 
  Published    1989 
  Keywords    Silicon, Boron, Plant G row th, H erbicide, Spinach 
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 TEI-XML for    default:Reihe_C/44/ZNC-1989-44c-0781.pdf 
 Identifier    ZNC-1989-44c-0781 
 Volume    44 
2Author    J. Polster, M. Schwenk, E. BengschRequires cookie*
 Title    The Role of Boron, Silicon and Nucleic Bases on Pollen Tube Growth of Lilium longiflorum (L.)  
 Abstract    It is possible to obtain pollen germination and pollen tube growth in vitro if boric acid is present. In this work the effect was studied using as a semiquantitative parameter the mean length (J) o f Lilium longißorum pollen tubes. Pollen tube growth was examinated in depend­ ence on boric acid, ortho-silicic acid, nucleic bases, Ca2+ and Zn2+ in 10% sucrose solution. The maximum o f 7is obtained for concentrations between 2 -2 0 ppm boron. The simultaneous supply o f silicon added as water glass leads to a synergistic stimulation effect on pollen tube growth and facilitates branching. The silicon action is preceded o f a pollen tube growth inhibi­ tion period during 3 h. Adenine and guanosine are able to substitute partially boron as pollen germination and pollen tube growth stimulator. Concentrations o f 100 ppm adenine leads to half the boron effect. The same stimulation effect is obtained by guanosine. Ca2+ can partially substitute boron as well. The stimulation action o f boron is significantly attenuated by Zn2+ and by the herbicide Dicuran. These and preceding results from physiological studies indicate that boron and silicon should be essential trace elements for the regulation o f molecular bio­ logical processes. 
  Reference    Z. Naturforsch. 47c, 102—2 (1992); received June 13/September 16 1991 
  Published    1992 
  Keywords    Pollen Tube Growth, Boron, Silicon, Lilium longiflorum, Germination 
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 TEI-XML for    default:Reihe_C/47/ZNC-1992-47c-0102.pdf 
 Identifier    ZNC-1992-47c-0102 
 Volume    47 
3Author    Detlef Gabel, Rita WalczynaRequires cookie*
 Title    B-Decachloro-o-carborane Derivatives Suitable for the Preparation of Boron-Labeled Biological Macromolecules  
  Reference    Z. Naturforsch. 37c, 1038—1039 (1982); received April 71982 
  Published    1982 
  Keywords    Boron, Neutron Capture Therapy, Boron-Labeled Proteins, B-Decachloro-o-carborane, Tumor Specific Antibodies 
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 TEI-XML for    default:Reihe_C/37/ZNC-1982-37c-1038_n.pdf 
 Identifier    ZNC-1982-37c-1038_n 
 Volume    37