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时间:2020-06-20
《落羽杉秋冬季叶色变化的生理生态研究.pdf》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、浙江农林大学学报,2014,31(2):302—307JournalofZhejiangA&FUniversitydoi:10.11833~.issn.2095—0756.2014.02.021落羽杉秋冬季叶色变化的生理生态研究孙苏南,王小德,徐腾,章残,王开利,邓磷曦(浙江农林大学风景园林与建筑学院,浙江临安311300)摘要:为探讨落羽杉Taxodiumdistiehum秋冬季叶色变化规律,研究落羽杉在不同光照、温度和不同生境条件下叶色转变时的生态生理变化,以落羽杉成龄植株为材料,于2012年8月下旬至11月中旬用分光光度计测定其不同方位与不同生境条件下
2、叶片叶绿素总质量分数、花色素苷相对含量和-"3-~性糖质量分数。结果表明:秋冬转色期落羽杉叶片叶绿素总质量分数呈下降趋势,树冠背阴面叶片叶绿素总质量分数明显高于向阳面,向阳东面高于向阳西面;花色素苷相对含量呈上升趋势,11月5日之后显著升高;可溶性糖质量分数呈上升趋势;日平均气温与花色素苷相对含量、可溶性糖质量分数间呈负相关;水生落羽杉叶绿素总质量分数、花色素苷相对含量、可溶性糖质量分数均高于陆生落羽杉,水生落羽杉红叶观赏期较陆生落羽杉长,它们的花色素苷相对含量与叶绿素总质量分数呈显著负相关(P<0.05)。光照充足条件下,生长在水中的落羽杉红叶期要长于陆生
3、的,且有较好的整体观赏性。图8表3参20关键词:植物生理学;落羽杉;秋冬转色期;生理指标;变化趋势中图分类号:$718.43文献标志码:A文章编号:2095—0756(2014)02—0302.06EcologicalphysiologyofTaxodiumdistichumleavescolorchangesinautumnandwinterSUNSunan,WANGXiaode,XUTeng,ZHANGCheng,WANGKaili,DENGLinxi(SchoolofLandscapeArchitecture,ZhejiangA&FUniversity
4、,Lin’an.311300,Zhejiang,China)Abstract:Toexploretheruleofcypressleafcolorchangesinautumnandwinter,andstudythephysiologica1characteristicsunderdifferentillumination,temperatureandhabitatconditions,thematurecypresstrees’(Taxodiumdistichum)variationsofchlorophyll,anthocyaninandsoluble
5、sugarc0ntentinits1eavesweremeasuredduringthecolor—changingperiodfromlateAugusttoearlyNovemberbyspectroDh0tometryThe.resultsindicatedthatthechlorophyllcontentdescendedgradually.Thechlorophyllcontentinthe1eavesintheshadysidewassignificantlyhigherthanthatinthesunnyside,andthatintheeas
6、tofthesunnysidewassignificantlyhigherthanthewest.TheanthocyanincontentkeptascendingslowlybeforeNovember5thandincreasedsignificantlysincethen.Thesolublesugarcontentincreasedgradually.Duringtheexperiment.therewasanegativecorrelationbetweendailyaveragetemperatureandanthocyanincontent。
7、orsolublesugarcontent.Chlorophyll,anthocyaninandsolublesugarcontentsofcypresswhichgrowninthewaterwere1essthanthosegrowninthefield.Thered·leafperiodofcypresstreeswhichweregrowninthewaterwas1ongerthan.thosegrowninthefield,andtherewasasignificantlynegativecorrelation(P<0.05)betweenant
8、hocyaninandchlorophyllcont
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