| ‘地平线’天竺葵的花芽分化及光周期特性 |
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| 引用本文： | 王琴,陈金涛,叶建飞,甘林叶,胡惠蓉.‘地平线’天竺葵的花芽分化及光周期特性[J].园艺学报,2013,40(4):773. |
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| 作者姓名： | 王琴 陈金涛 叶建飞 甘林叶 胡惠蓉 |
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| 作者单位： | （华中农业大学园艺林学学院，园艺植物生物学教育部重点实验室，武汉 430070） |
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| 摘 要： | 为了研究‘地平线’天竺葵的花芽分化特性及光周期对其生长发育的影响，采用石蜡切片
方法观察了花芽分化的过程，探讨了7 种光周期处理对始花期及开花质量的影响。结果表明：（1）‘地平
线’的花芽分化过程可以划分为8 个时期，持续时间大约为9 周；（2）‘地平线’花芽分化时期与各生长
指标（株高、株幅、真叶数和播种周数）均极显著相关，通过回归方程判断其幼龄期在5 片真叶前结束；
（3）‘地平线’为量性短日照植物，促其早花的最佳光周期为昼12 h/夜12 h；（4）较长日照下‘地平线’
的株形高大松散，较短光周期下矮小紧凑。‘地平线’天竺葵在5 片真叶前，采用16 h 日照栽培，可得到
健壮幼苗；5 叶期后，12 h 日照诱导，可促进分枝开花。
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| 关 键 词： | 天竺葵 花芽分化 营养生长 光周期 开花调节 |
Floral Bud Differentiation and Photoperiodic Characteristics of Pelargonium hortorum‘Horizon’ |
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| WANG Qin,CHEN Jin-Tao,YE Jian-Fei,GAN Lin-Ye,HU Hui-Rong.Floral Bud Differentiation and Photoperiodic Characteristics of Pelargonium hortorum‘Horizon’[J].Acta Horticulturae Sinica,2013,40(4):773. |
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| Authors: | WANG Qin CHEN Jin-Tao YE Jian-Fei GAN Lin-Ye HU Hui-Rong |
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| Institution: | （Key Laboratory of Horticultural Plant Biology，Ministry of Education，College of Horticulture and Forestry Science，
Huazhong Agricultural University，Wuhan 430070，China） |
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| Abstract: | To study the characteristics of floral bud differentiation（FBD）and effects of photoperiod
on growth and development of Pelargonium hortorum‘Horizon’，paraffin section method was used in
identify the process of FBD，and flowering time and flower quality were investigated as the effects of 7
kinds of photoperiod. The results show that：(1) There were 8 phases during FBD of‘Horizon’，and it
lasted about 9 weeks. (2) Significant correlation existed between vegetative growth and FBD phases，and
juvenile phase of‘Horizon’ended at 5-leaf stage according to the regression equations. (3)‘Horizon’
was a facultative short day plant，of which the best photoperiod promoting flowering was 12 h. (4) The
plants tended to have a tall and loose habit under longer days，and an opposite habit under shorter days. It
is suggested that Pelargonium hortorum‘Horizon’planted under long-day of 16 h before 5-leaf stage to be
strong as seedlings，and then under short-day of 12 h to promote branches and flowers. |
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| Keywords: | Pelargonium hortorum Pelargonium hortorum floral bud differentiation vegetative growth photoperiod flower control |
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