南方鲜食枣2种类型枣吊光合产物积累能力的比较.pdf

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1、第50卷第6期林业科学Vol.50，No.62014年6月SCIENTIASILVAESINICAEJun．，2014doi:10．11707/j．1001-7488．20140612南方鲜食枣2种类型枣吊光合产物积累能力的比较王森晏巢(中南林业科技大学林学院长沙410004)摘要:以南方鲜食枣品种中秋酥脆枣的2种类型枣吊为试材，对木质化枣吊和非木质化枣吊叶片的生长期、叶面积、光合效率进行研究。结果表明:1)木质化枣吊生长期明显比非木质化枣吊生长期长;2)木质化枣吊叶片叶面积显著大于非木质化枣吊叶面积;3)

2、木质化枣吊叶片净光合速率大于非木质化枣吊叶片，而且在强光下仍可保持较高的光合效率;4)木质化枣吊叶片栅栏组织细胞密集度大于非木质化枣吊叶片，且木质化枣吊茎的输导组织较非木质化枣吊发达;5)木质化枣吊叶片叶绿素a和叶绿素b的比值明显大于非木质化枣吊的叶绿素a和叶绿素b的比值。综合分析认为，木质化枣吊与非木质化枣吊相比，在生长期、叶面积、光合效率3个方面具有优势，这些特点最终决定其拥有较高的光合产物积累能力。关键词:枣;枣吊;组织解剖结构;光合效率中图分类号:S718.43文献标识码:A文章编号:1001－74

3、88(2014)06－0090－08ComparisonoftheAccumulationAbilityofPhotosyntheticProductbetweenTwoTypesofBearingShootsofSouthernChinaFresh-EatJujubeWangSenYanChao(CollegeofForestry，CentralSouthUniversityofForestryandTechnologyChangsha410004)Abstract:Inthispaper，asouthe

4、rnfreshjujube，Zhongqiusucui，usedinacomparativestudyonthegrowthperiod，leafareaandphotosyntheticefficiencyoflignifiedbearingshootandnon-lignifiedbearingshoot．Theresultsshowedthat:1)Thegrowthperiodoflignifiedbearingshootwaslongerthanthatofnon-lignifiedbearing

5、shoot．2)Theleafareaoflignifiedbearingshootwassignificantlylargerthanthatofnon-lignifiedbearingshoot．3)Thenetphotosyntheticrateoflignifiedpersistentbearingwashigherthanthatofnon-lignifiedbearingshoot．Underthestronglightcondition，lignifiedbearingshootstillma

6、intainedhighphotosyntheticrate．4)Anatomyshowedthatthecelldensityofthepalisadetissuesoflignifiedbearingshootwasgreater，andtheconductingtissueofstemwasstrongerthanthatofnon-lignifiedbearingshoot．5)Thechlorophylla/bratiooflignifiedbearingshootwassignificantly

7、greaterthanthatofnon-lignifiedbearingshoot．Bycomprehensiveanalysisonthecomparisonbetweenlignifiedbearingshootandnon-lignifiedbearingshoot，thelignifiedbearingshoothadadvantagesingrowthperiod，leafareaandphotosyntheticefficiency，allofwhichindicatethelignified

8、bearingshootshouldhavehigheraccumulationabilityofphotosyntheticproduct．Keywords:jujube;bearingshoot;tissueanatomicalstructure;photosyntheticefficiency枣吊是枣树(Ziziphusjujuba)结果的基本单位，化栽培技术的不断进步，在我国南方枣区木质化枣具有结果和进行