INTERACTIVE DYNAMICS OF FRUIT AND STEM GROWTH IN TOMATO PLANTS AS AFFECTED BY ROOT WATER CONDITION I. EXPANSION AND CONTRACTION OF FRUIT AND STEM

概要

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For on-line and intact measurement of fruit and stem growth, a laser displacement sensor (LDS) system was newly developed, and two sets of the LDS system were applied for dynamic analysis of fruit and stem growth in tomato plants (Lycopersicon esculentum Mill.) as affected by change in root water condition. The plants potted with soil were dewatered gradually for three days and then rewatered. Fruit and stem growth appeared in the dissymmetrical relationship: During dewatering, fruit growth was kept higher even under larger decrease in xylem water potential and significant stem contraction, but just after rewatering drastic fruit shrinkage was induced with rapid swelling of the stem. This demonstrates the interaction between fruit and stem growth through dynamics of water relations along the translocation path in stem. Thus, the newly developed LDS system can be reliable for dynamic analysis of fruit and stem growth.
九州大学の論文