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1、生态学杂志ChineseJournalofEcology摇2010,29(11):2122-2130摇摇摇摇摇摇摇摇摇摇摇摇摇滤减UV鄄B辐射对烟叶腺毛发育和*密度动态变化的影响1**12111陈宗瑜摇简少芬摇浦卫琼摇钟摇楚摇董陈文华摇纪摇鹏12(云南农业大学农学与生物技术学院,昆明650201;云南农业大学云南省植物病理重点实验室,昆明650201)摘摇要摇以烟草品种“K326冶为材料,盆栽种植于自然环境条件下(CK)和覆盖不同厚度透明薄膜,分别滤减25%(T)、50%(T)和65%(T)UV鄄B辐射的大棚中,在“K326冶开花期123至工艺成熟后
2、期的4个生育期,通过扫描电镜观察了各处理烟叶腺毛形态和密度动态变化特征,并首次报道了“K326冶中存在分枝腺毛。结果表明:上表皮腺毛在开花期、生理成熟期和工艺成熟前期对UV鄄B辐射敏感,下表皮则在开花期和工艺成熟后期对UV鄄B辐射敏感;T处理腺毛密度低且延缓腺毛的发育,T和T处理腺毛密度较高,在工艺成熟期出现312二次发育现象;各处理烟叶腺毛以长柄腺毛为主,CK、T、T下表皮腺毛总密度大于上表12皮,而T上、下表皮差异不大;滤减UV鄄B辐射有利于烟叶下表皮长柄腺毛发育,而引起腺3毛二次发育的腺毛类型依处理和时期而异;适当较高强度的UV鄄B辐射对烟叶腺
3、毛发育有促进作用,在研究地减弱25%~50%的UV鄄B辐射强度对烟叶腺毛发育较为合适。关键词摇烟草;腺毛;扫描电镜;密度;动态变化中图分类号摇S572摇文献标识码摇A摇文章编号摇1000-4890(2010)11-2122-09EffectsofreducedUV鄄Bradiationontobaccoleafglandulartrichomedevelopmentand1121density.CHENZong鄄yu,JIANShao鄄fen,PUWei鄄qiong,ZHONGChu,DONGChen鄄wen鄄111hua,JIPeng(Colleg
4、eofYunnanAgronomyandBiotechnology,YunnanAgricultural2University,Kunming650201,China;KeyLaboratoryforPlantPathologyofYunnanProvince,YunnanAgriculturalUniversity,Kunming650201,China).ChineseJournalofEcology,2010,29(11):2122-2130.Abstract:TakingtobaccocultivarK326astestobject,apot
5、experimentwasconductedtostudytheeffectsofreducedUV鄄Bradiationonthedynamicchangesofthemorphologyanddensityoftobaccoleafglandulartrichomefromfloweringtopost鄄technologicalmaturitystage.Fourtreat鄄mentswereinstalled,i.e.,naturalUV鄄Bradiation(CK),andreduced25%(T),50%1(T),and65%(T)ofn
6、aturalUV鄄Bradiationviacanopy鄄coveringwithdifferentthickness23transparentplasticfilm,andscanningelectronmicroscopewasusedtoobservethedynamicchan鄄ges.ItwasfirstreportedthatK326leafhadbranchedglandulartrichome.TheglandulartrichomeonadaxialepidermiswassensitivetoUV鄄Bradiationatthes
7、tagesofflowering,physiologicalma鄄turity,andpre鄄technologicalmaturity,whilethatonabaxialepidermiswassensitivetoUV鄄Bra鄄diationatthestagesoffloweringandpost鄄technologicalmaturity.TreatmentTcausedthelower3densityofglandulartrichomeanddelayeditsdevelopment,whiletreatmentsTandTinduce
8、d12thehigherdensityofglandulartrichomeanditssecondaryd
