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The FI-LM Sensor enables to monitor growth of large size fruits as well as variations of their diameter in submillimeter range. Two phenomena affect diurnal behavior of fruit diameter: growth and water balance of a plant. A growth component is dominant in most of cases (see Fig.1 below). However, some fruits may loose water or decelerate their growth in result of water stress , lack of light or daytime water loss (see Fig. 2 below). Two features of the daily fruit growth curve are to be noted: a diurnal form and daily maximums trend that is growth rate).
Thus, the FI-LM sensor allows investigating intimate effects of environmental factors on water balance and growth of fruits
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