Abstract

Abstract Flowering in many plants can be geotropically influenced. Apple limbs are tied down as a commercial practice to increase flowering, and pineapple plants tipped on their sides flowered earlier than those grown upright (5). Flowering at the lower nodes of soybean plants was improved after weights were used to make stem tips grow downward (1). In apple (2) and pineapple (3) there is evidence that the geotropic stimulation may be mediated through ethylene. The effect of horizontal placement of plants on flowering of Phaseolus vulgaris was investigated, since ethephon treatments have increased flowering in that plant (4).

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