资源描述：
《不同光强和光质对白桦幼树体内三萜积累的影响》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、天然产物研究与开发NatProdResDev2010,22:475478文章编号:10016880(2010)03047504不同光强和光质对白桦幼树体内三萜积累的影响111*1112李新宇,尹静,詹亚光,任春林,邱伟,陈秀福,景丽鸿12东北林业大学生命学院,哈尔滨150040;东北林业大学帽儿山实验林场,哈尔滨150040摘要:来源于白桦树皮中的五环三萜类次生代谢产物白桦酯醇和齐墩果酸,具有广泛的药理学活性,是具开发潜力的抗癌和抗艾滋病毒类天然物质。本研究以白桦幼树为研究试材,通过不同光质和光强处理,检测白桦树各部位白桦酯醇
2、和齐墩果酸含量变化。结果表明,与对照(白光)相比,红、黄、蓝、绿4种光质处理均降低白桦茎外皮中这两种三萜物质的积累;绿光处理下可显著提高叶片中齐墩果酸含量,而蓝光处理下可显著提高叶片中白桦酯醇含量,两种物质分别为对照的13.28倍和1.959倍。生长季节内,茎皮中齐墩果酸和白桦酯醇含量以八月份最高,极显著高于其它月份,且以遮光处理(50%自然光)的效果较佳,齐墩果酸和白桦酯醇含量比正常光处理分别提高30.50%和45.09%。白桦植株中白桦酯醇和齐墩果酸含量的变化显著受到季节的调控。该研究为白桦树中三萜物质高效积累的栽培技术建立和代谢调控研究奠
3、定了基础。关键词:白桦;光;白桦酯醇;齐墩果酸中图分类号:Q946.91;R284.1文献标识码:AEffectofDifferentIntensityandQualityofLightonAccumulationofTriterpenoidinBirch(Betulaplatyphyllasuk.)Seedlings111*1112LIXinyu,YINJing,ZHANYaguang,RENChunlin,QIUWei,CHENXiufu,JINGLihong12CollegeofLifeSciences,MaoershanExp
4、erimentalForestryCenter,NortheastForestryUniversity,Harbin150040,ChinaAbstract:Betulinandoleanolicacidinbarkofthewhitebirhtreesasthesecondarymetabolitesofpentacyclictriterpenoid,haveextensivelypharmacologicalactivities,whicharethenaturalsubstancesworthyofbeingempolderedinus
5、ingforanti-cancerandanti-HIV.Inthisstudy,betulinandoleanolicacidcontentindifferentpartsofbirchseedlingswhichweretreatedbydifferentintensityandqualityoflight,wereanalyzed.Theresultsshowedthatwiththecomparionofcontrol(whitelight),theaccumulationofthetwotriterpenoidsintheirstem
6、skindecreasedunderfourkindstreatmentoflightqualityincludethered,yellow,blue,green.Oleanolicacidcontentinleafofwhitebirchtreatedbythegreenlightandbetulincontentinleaftreatedbybluelightweresignificantlyincreased,whichwere13.28timesand1959timehigherthanthatofcontro,lrespectiv
7、ely.Inthegrowingseason(fromJunetoOctober),thehighestcontentsofoleanolicacidandbetulininthestembarkwasinAugust,whichwerehigherthanothermonths.Thebestshadingtreatmentwas50%ofnaturallight.Underthecondition,oleanolicacidandbetulincontentinthestembarkwereincreasedto45.09%and30.5
8、0%higherthannormallight,respectively.Thecontentsofoleanolicacidandbetulinin
