草豆蔻传粉生物学的研究

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1、植物分类学报43(1)：37-49(2005)ActaPhytotaxonomicaSinica草豆蔻传粉生物学的研究。，王英强。张奠湘。陈忠毅(中国科学院华南植物园广州510650)(仲恺农业技术学院广州510225)PollinationbiologyofAlpiniahainanensis(Zingiberaceae)一WANGYing．QiangZHANGDian．XiangCHENZh0ng．Yi(SouthChinaBotanicalGarden，theChineseAcademyofScience

2、s，Guangzhou510650，China)(z^。ng妇fAgmc^nf∞fCollege，Guangzhou510225，China)AbstractComparativestudiesonpollinationbiologyoftwofloralmorphsinAlpiniahainanensiswerecarriedoutinHainanProvinceandGuangzhou，GuangdongProvince，southeraChina．PopulationsofA．hainanensishav

3、etwofloralmorphsandthebehaviorsofstylarmovementsinthetwofloralmorphsaresimilartothosefoundinotherspeciesofAiapreviouslyreported．However，thestylarmovementbehaviorofthecataflexistylousmothis2hslowerthanthatoftheananexistvlOusmorph．Therearesomeasynchronousstyla

4、rmovementsonthesamefloralmorph，evenonthesameinflorescence．Yet，allanthersoftheanaflexistylousfloralmorphsdehisceonlyafterallstigmasofthesamephenotypehavemovedoutofthereceptiveposition。viz．，abovetheanthers．Ourresultsindicatethattheanaflexistylousmorphhasmorepo

5、llengrainsperflower。higherpollen／ovuleratio(P／O)，andlargernectarvolumethanthecataflexist3rlousmorph．whileapproximatelyequalovulenumbers，sugarandaminoacidconcentration．Fieldexperimentsindicatethatthefruitsetsaresignificantlyhighinbothartificiallyout—crossedan

6、dself-pollinatedflowers，whilenofruitsetwasobservedinbaggedemasculatedflowersandtheunpollinatedbaggedflowers．ThesefactsexhibitthatA．hainanensisisself-compatibleandthereisnoself-pollinationandagamospermyinthespecies．Therearesignificantdiferencesinthefruitsetsa

7、mongtheanaflexist3rlousflowerswithhand—pollinationtreatmentsatdiferenttimesduringtheday，butnotinthecataflexistylousflowers．Thefruitsetbyhandpollinationismuchhigherthanthatundernaturalcondition．ThismeansthatA．hainanensisisdependentuponinsectsforpolfination．an

8、dinsufficiencyofpollinatorslimitedfruitsetundernaturalcondition．TheefectivepollinatorswereAmegllasp．andtwospeciesofcarpenterbees(Xylocopasp．)．However，onlyfewerinsectsatalowerfrequencyvisitedflow