论文信息 - A microprocessor-based instrument for measuring plant growth

A microprocessor-based instrument for measuring plant growth

Abstract A device for measuring extension growth of plant tissues is described. Growth is converted into a series of digital pulses by means of an optical linear displacement transducer and comparator circuit. The pulses are analysed by a compact Motorola 6802 microprocessor-based system and times, accumulated lengths and absolute and relative extension rates are printed. The microprocessor can handle up to four separate transducer inputs simultaneously and is capable of resolving fluctuations in growth occurring over periods as short as a few minutes. Examples of the use of the instrument to measure grass leaf extension and its response to plant hormones and light-dark cycles are presented.

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