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时间:2019-05-28
《蓝猪耳花器官的发生与发育》由会员上传分享,免费在线阅读,更多相关内容在行业资料-天天文库。
1、园艺学报2010,37():4607–612ActaHorticulturaeSinica蓝猪耳花器官的发生与发育1,222,*陈素红,邹璞,廖景平12(广东食品药品职业学院,广州510520;中国科学院华南植物园,广州510650)摘要:玄参科植物蓝猪耳(Toreniafournieri)的萼片、花冠、雄蕊和雌蕊原基都具两侧对称性,且为合萼、合瓣花,雄蕊着生在花冠上,子房两心皮两室。花器官分化顺序为萼片、雄蕊原基、花瓣原基、雌蕊原基。5枚萼片原基发生顺序不一致,其式样为近轴面1原基-远轴面2原基-2侧生原基,萼片原基的发育是同步的;雄蕊原基先于花瓣原基发生,但其发育比花瓣原基缓慢,4枚雄蕊原
2、基几乎同时发生;5枚花瓣原基同时发生,且远轴面的两枚花瓣原基后来有愈合迹象。与同科Agalinisdensiflora花发育比较,两种植物花器官原基发生的时间和先后顺序有较大的差异。与同科地黄属(Rehmannia)、苦苣台科(Gesneriaceae)异叶苣苔属(Whytockia)、尖舌苣苔属(Rhynchoglossum)和台闽苣苔属(Titanotrichum)的花器官发生和发育比较,发现玄参科和苦苣苔科的花器官发生和发育关系比较复杂,5属并不能笼统划分为两种不同的式样,认为以子房室数和胎座类型划分玄参科和苦苣苔科的可靠性仍需进一步探讨。关键词:蓝猪耳;花器官;发生;发育中图分类号:S
3、68文献标识码:A文章编号:0513-353X(2010)04-0607-06FloralOrganogenesisandDevelopmentofToreniafournieri1,222,*CHENSu-hong,ZOUPu,andLIAOJing-ping12(GuangdongFoodandDrugVocationalCollege,Guangzhou510520,China;SouthChinaBotanicalGarden,ChineseAcademyofSciences,Guangzhou510650,China)Abstract:TheflowerofToreniafourni
4、eri(Scrophulariaceae)isperfect,usuallyzygomorphic.Corollaissympetalous,trumpetshapedandwithalowerlipdividedintothreelobesandalargerupperlipwithtwolobes.Initiationoffivesepalprimordiaisnotconsistentinorder;Theorderofinitiationisfromoneadaxialprimordium,twoabaxialprimordiaandfinallytwolateralprimordia
5、,whiletheirdevelopmentissynchronous.Fourstamenprimordiainitiatenearlyatthesametimebeforetheinitiationofthepetalprimordiaandgrowslowerthanthepetalprimordia.Fivepetalprimordiainitiatesimultaneously,andtwoabaxialprimordiaarefusedlater.ComparedtothefloralorganogenesisofAgalinis(Scrophulariaceae),therear
6、emoredifferencesinthetimeandorderofeveryfloralprimordiainitiation.WhilecomparedtothepatternsoffloralorganogenesisofRehmannia(Scrophulariaceae),Whytockia,RhynchoglossumandTitanotrichum(Gesneriaceae),therearenottwodistinctpatternsofthefivegeneraexistinthefloralorganogenesis,whichshowsrelativelycomplex
7、relationshipbetweenScrophulariaceaeandGesneriaceaeandthattheovaryloculesandplacentationwereusedtodivisionofthesetwofalimiesshouldbestudiedfurther.收稿日期:2009–07–08;修回日期:2010–03–17基金项目:国家自然科学基金项目(3017006
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