Changes in Respiration and Cyanide Sensitivity of the Barley Floret during Development and Maturation

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Abstract
The 6-week period of development and maturation of the barley (Hordeum vulgare L.) floret from anthesis to harvest is characterized by two phases: an early phase of rapid increase in respiration rate and dry weight, and a late phase during which respiration decreased rapidly whereas dry weight remained unchanged. Consumption of O2 by the embryo changed little during the entire developmental period, whereas O2 uptake by the endosperm and the lemma and palea decreased significantly during the late phase.