The Role of Wheat Awns in the Seed Dispersal Unit

The dispersal unit of wild wheat bears two pronounced awns that balance the unit as it falls. We discovered that the awns are also able to propel the seeds on and into the ground. The arrangement of cellulose fibrils causes bending of the awns with changes in humidity. Silicified hairs that cover th...

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Veröffentlicht in:	Science (American Association for the Advancement of Science) 2007-05, Vol.316 (5826), p.884-886
Hauptverfasser:	Elbaum, Rivka, Zaltzman, Liron, Burgert, Ingo, Fratzl, Peter
Format:	Artikel
Sprache:	eng
Schlagworte:	Agricultural soils Agronomy. Soil science and plant productions Animal and plant ecology Animal, plant and microbial ecology Autoecology Awns Bending Biological and medical sciences Biology and morphogenesis of the reproductive apparatus. Photoperiodism, vernalisation Botany Cellulose - analysis Climate Coarse textured soils Dispersal Economic plant physiology Fundamental and applied biological sciences. Psychology Grounds Hair Humidity Lignin - analysis Lignin - chemistry Lignin - ultrastructure Microscopy, Acoustic Microscopy, Electron, Scanning Morphology, anatomy, histology, cytology Motors Plant cytology, morphology, systematics, chorology and evolution Plant Epidermis - physiology Plant Epidermis - ultrastructure Plant physiology and development Plants and fungi Sand soils Seed dispersal Seeds Seeds - chemistry Seeds - physiology Seeds - ultrastructure Silicon Dioxide - analysis Soil Solar fibrils Spermatophyta Stress, Mechanical Triticum - physiology Triticum - ultrastructure Vegetative and sexual reproduction, floral biology, fructification Wheat
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