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Desiccation tolerance of Zizania palustris seeds: temperature dependence, imbibitional damage, and role of 'dehydrin' proteins


, : Desiccation tolerance of Zizania palustris seeds: temperature dependence, imbibitional damage, and role of 'dehydrin' proteins. Proceedings of the Fourth International Workshop on Seeds: basic and applied aspects of seed biology, Angers, France, 20-24 July, 1992 Volume 3: 851-856

Previously thought to be intolerant of desiccation, seeds of North American wild rice (Zizania palustris var. interior) can survive dehydration to as low as 7% moisture content if dehydration occurs at temperatures >25 degrees C, and if imbibitional damage is avoided by slow rehydration at temperatures between 10 degrees and 25 degrees. Developing embryonic axes are germinable as much as 2 weeks prior to the acquisition of desiccation tolerance.

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Related references

Kovach, D.A.; Bradford, K.J., 1992: Imbibitional damage and desiccation tolerance of wild rice (Zizania palustris) seeds. Seeds (caryopses) of North American wild rice (Zizania palustris var. interior), a temperate aquatic grass, have been reported to lose viability when desiccated (i.e. to be 'recalcitrant' or 'homoiohydrous'). They are also deep...

Ntuli, T.M.; Berjak, P.; Pammenter, N.W.; Smith, M.T., 1997: Effects of temperature on the desiccation responses of seeds of Zizania palustris. Seeds of wild rice (Zizania palustris var. interior) have been reported to show maximum survival when dehydrated at 25 degree C. It has also been reported that axis cells sustain least damage at this drying temperature. In the present study, a lin...

Still, D..W..; Kovach, D..A..; Bradford, K..J.., 1994: Development of Desiccation Tolerance during Embryogenesis in Rice (Oryza sativa) and Wild Rice (Zizania palustris) (Dehydrin Expression, Abscisic Acid Content, and Sucrose Accumulation). The accumulation of dehydrin proteins, ABA and soluble carbohydrates (sucrose and oligosaccharides) was studied in rice cv. M201 embryos and Z. palustris cv. NC1 axes in relation to the development of desiccation tolerance during embryogenesis. Ri...

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