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Glossary:
Coleoptile: a sheath protecting a young shoot tip in a grass or cereal (from greek Koleon ‘sheath’ + Ptilon ‘feather’)
Decapitated: having had the head cut off. From latin de- (expressing removal) + caput, capit- ‘head’.
Agar: a gelatinous substance obtained from certain red seaweeds.
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