Abstract

Ethylene plays an important role in plant physiology, being responsible for the maturation of fruits. In specialised laboratories this gaseous plant regulator is quantified through complex and expensive gaschromatography equipment; this technology is not available in schools, so ethylene is neglected by teachersperforming an experimental study about the control of plant growth and development. To provide an indirect but reliable indication of ethylene production by fruits, we developed a simple bioassay based on the titrationof malic acid.

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