短日照对烤烟花芽分化及生物学性状的影响

Effects of Photoperiod on Floral Bud Differentiation and Growth of Flue-cured Tobacco

以烤烟品种NC82（Nicotiana Tabacum cv.NC82）为试验材料,通过诱导方法研究了光周期对烟草花芽分化及生物学性状的影响。结果发现：①短日照处理可使烟株的现蕾时间提前,表明NC82具有一定短日性;②6 h和8 h的短日照条件,均可有效诱导烟株早花;③9~13叶期的烟株具有同等的感受花芽分化诱导信号的能力;④在9叶至13叶期范围内的烟株,接受诱导信号的时期越早,其花芽分化越早,叶片数越少。该结果为烟草早花影响因素、有效诱导时期研究提供了参考。

The effects of short day light conditions on the floral bud differentiation and growth of flue-cured tobacco with different seedling ages were studied with NC82（Nicotiana Tabacum cv.） as material in this paper.The results showed that： ①the flowering time was earlier under short-day light condition than under control.This indicated that NC82 belong to short-day light plant;②both the 6 h-and 8 h-short day light treatments could induce tobacco plants to premature flowering;③the plant at 9-leaf stage and 13-leaf stage had the same ability to sense environmental signal;④for the plants ranged from 9-leaf to 13-leaf stage,the earlier it received the signal,the earlier it transferred to floral bud differentiation and the less leaves it had.The method of photoperiod induction was expected to provide more references on inductive factors and the sensible period.