Abstract
Some species of Spirogyra can anchor to substratum with rod- or rosette-shaped rhizoid (hapteron). The rhizoid differentiation can be induced by cutting algal filaments in a laboratory. Requirement of contact stimulation for rhizoid differentiation has been reported (Nagata in Plant Cell Physiol 14:531–541, 1973a). However, the control mechanism of rhizoid morphology has not been elucidated. When cut filaments were incubated on the glass surface, start of tip growth, secretion of lectin-binding material and callose synthesis were observed. In the absence of contact to the glass surface, none of above phenomena was induced. Systematic analysis showed that rosette-shaped rhizoid was formed only on the hydrophobic substratum. On the hydrophobic substratum, both Bandeiraea (Griffonia) simplicifolia lectin and jacalin strongly stained the rhizoids. On the hydrophilic substratum, however, only Bandeiraea (Griffonia) simplicifolia lectin strongly stained the rhizoids.
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Abbreviations
- APW:
-
Artificial pond water
- HEPES:
-
N-2-hydroxyethylpiperazine-N′-2-ethanesulfonic acide
- BSL-I:
-
Bandeiraea (Griffonia) simplicifolia lectin
- WGA:
-
Wheat germ agglutinin
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Ikegaya, H., Sonobe, S., Murakami, K. et al. Rhizoid differentiation of Spirogyra is regulated by substratum. J Plant Res 121, 571–579 (2008). https://doi.org/10.1007/s10265-008-0182-8
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DOI: https://doi.org/10.1007/s10265-008-0182-8