吉林农业大学学报
吉林農業大學學報
길임농업대학학보
JOURNAL OF JILIN AGRICUL TURAL UNIVERSITY
2014年
3期
294-299
,共6页
于营%郭靖%王志清%韩月乔%欧阳艳飞
于營%郭靖%王誌清%韓月喬%歐暘豔飛
우영%곽정%왕지청%한월교%구양염비
桔梗%花部特征%开花物候%人工授粉%生殖特性
桔梗%花部特徵%開花物候%人工授粉%生殖特性
길경%화부특정%개화물후%인공수분%생식특성
Platycodon grandiflorum%floral trait%flowering phenology%artificial pollination%reproduc-tive characteristic
研究了白花桔梗和紫花桔梗的开花物候和生殖特征,分析了2个群体的单花开花动态、开花物候指数和结实率,以及开花物候指数对桔梗生殖成功的影响。结果表明:桔梗花期为7月初至9月中下旬,桔梗开花一般历时35~47 d ,单株花期一般为26~31 d ,单花花期一般为5~7 d。2个群体个体水平的开花振幅曲线呈单峰型曲线,并且开花同步指数较高,表现出一种集中开花式样。相关分析表明:白花桔梗中,坐果数与开花高峰期和花蕾数呈极显著正相关,紫花桔梗中坐果数与花蕾数呈极显著正相关。开花物候变异系数分析表明:2个群体在总花数、开花振幅、开花高峰期、终花期和结实率差异极显著,白花桔梗与紫花桔梗在同步性指数、花期持续时间、始花期和坐果数无显著性差异。
研究瞭白花桔梗和紫花桔梗的開花物候和生殖特徵,分析瞭2箇群體的單花開花動態、開花物候指數和結實率,以及開花物候指數對桔梗生殖成功的影響。結果錶明:桔梗花期為7月初至9月中下旬,桔梗開花一般歷時35~47 d ,單株花期一般為26~31 d ,單花花期一般為5~7 d。2箇群體箇體水平的開花振幅麯線呈單峰型麯線,併且開花同步指數較高,錶現齣一種集中開花式樣。相關分析錶明:白花桔梗中,坐果數與開花高峰期和花蕾數呈極顯著正相關,紫花桔梗中坐果數與花蕾數呈極顯著正相關。開花物候變異繫數分析錶明:2箇群體在總花數、開花振幅、開花高峰期、終花期和結實率差異極顯著,白花桔梗與紫花桔梗在同步性指數、花期持續時間、始花期和坐果數無顯著性差異。
연구료백화길경화자화길경적개화물후화생식특정,분석료2개군체적단화개화동태、개화물후지수화결실솔,이급개화물후지수대길경생식성공적영향。결과표명:길경화기위7월초지9월중하순,길경개화일반력시35~47 d ,단주화기일반위26~31 d ,단화화기일반위5~7 d。2개군체개체수평적개화진폭곡선정단봉형곡선,병차개화동보지수교고,표현출일충집중개화식양。상관분석표명:백화길경중,좌과수여개화고봉기화화뢰수정겁현저정상관,자화길경중좌과수여화뢰수정겁현저정상관。개화물후변이계수분석표명:2개군체재총화수、개화진폭、개화고봉기、종화기화결실솔차이겁현저,백화길경여자화길경재동보성지수、화기지속시간、시화기화좌과수무현저성차이。
White and purple Platycodon grandiflorum populations were taken as test objects to study their phenology and reproductive characteristics .Single flowers′floral dynamics ,flowering phenology indexes and fruit setting rate of the two populations were analyzed ,and the effects of flowering phenology indexes on the reproductive success of P . grandiflorum were studied .The flowering span of P . grandiflorum was from early July to mid and late September ,and the flowering phase of the population ,individual , and single flower lasted approximately 35~47 ,26~31 ,and 5~7 days ,respectively .The flowering am-plitude curves of the populations at individual level were of single peak and higher synchrony ,taking on a“mass-flowering” pattern . Correlation analysis showed that white flower P . grandiflorum fruit setting number had significantly positive correlation with flourishing flowering date and bud number and purple flower P . grandiflorum fruit setting number had significantly positive correlation with bud number .Vari-ation coefficient analysis of flowering phenology indicated that there existed significant differences in the total flower number ,flowering amplitude ,peak flowering date ,last flowering date and fruit setting ,but less difference in synchrony index ,first flowering date ,flowering duration and fruit setting number among the two populations .