Abstract
In the short-day plant Euphorbia fulgens under short-day conditions the flower induction in the shoot apex is delayed more and more nodes are formed beneath the final cyathium, the higher the temperature up to 28°C. The delay of induction is greater with plants growing in a moist soil than in a dry soil. The difference between moist and dry soil is greater, the higher the temperature. There are slight temporal differences in the induction of the lateral shoots in the temperature range between 15°C and 25°C, but the number of nodes formed at the lower paracladia is greater at the higher temperature. The development of the cyathia is enhanced at high temperatures. At temperatures above 28°C induction is prevented. The temperature limit for induction is some degrees higher for plants in dry soil than for those in moist soil. Cycocel causes effects similar to those caused by water deficiency, although the newly formed internodes become shorter.
Published Version
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