| | 2 | Author
| J. Polster, M. Schwenk, E. Bengsch | Requires 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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| ZNC-1992-47c-0102 | | | | Volume
| 47 | |
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