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Low day temperature reduces growth and movement of plants by reducing hormone production

Greenhouse growers want to keep plantlets small and compact. Adapted control of the temperature in the greenhouse is a sustainable method to achieve this. Plants remain small when they are grown in a greenhouse in which the nights are made warmer and the days cold. But why? Researchers of Wageningen University and Utrecht University Utrecht discovered that such a regime results in plants producing much lower amounts of the plant hormone ethylene while becoming less sensitive to the hormone at the same time.

This study has been published in Plant Physiology, August 2013 and can be found here: Antiphase Light and Temperature Cycles Affect PHYB-controlled Ethylene Sensitivity and Biosynthesis; Limiting Leaf Movement and Growth of Arabidopsis