Department of Vegetable Crops, Cornell University, Ithaca, New York 14850.
Plant Physiol. 1968 Oct;43(10):1696-8. doi: 10.1104/pp.43.10.1696.
Changes in levels of sugars and starch in the shoot tip of cauliflower, Brassica oleracea L. var. botrytis D. C. cv. Main Crop were studied during periods of growth which were inductive or non-inductive to flowering. Flowering was induced by growing plants for 2 weeks under 16 hr of light at 5 degrees . During this period of floral induction there was a significant increase in sugar and starch content compared to that in vegetative plants grown at 20 to 26 degrees . Sugar and starch content did not increase and flowering was prevented when light and CO(2) were excluded during growth at 5 degrees . A 3-day dark period at 20 degrees or a high temperature treatment at 33 degrees with light following growth at 5 degrees reduced the carbohydrate level and prevented flowering.
花椰菜（ Brassica oleracea L. var. botrytis D. C. cv. Main Crop）茎尖中糖和淀粉水平的变化在诱导或非诱导开花的生长期间进行了研究。通过在 5 摄氏度下光照 16 小时，将植物生长 2 周来诱导开花。在这个开花诱导期间，与在 20 到 26 摄氏度下生长的营养植物相比，糖和淀粉含量显著增加。当在 5 摄氏度下生长时，排除光照和 CO(2)，糖和淀粉含量不会增加，并且会阻止开花。在 20 摄氏度下进行为期 3 天的黑暗期，或在 5 摄氏度下生长后进行高温处理（33 摄氏度，有光照），会降低碳水化合物水平并阻止开花。
