云南近光滑小檗(小檗科)主要分类学性状特征的变异式样  

Variation Patterns of Main Taxonomic Characters of Berberis sublevis(Berberidaceae) from Yunnan Province

作　　者：范俊[1] 李新华[1] 张立存[1] 施小平[1] 

机构地区：[1]南京农业大学生命科学学院,南京210095

出　　处：《西北植物学报》2015年第6期1160-1165,共6页Acta Botanica Boreali-Occidentalia Sinica

基　　金：国家自然科学基金(31170174);科技部科技基础性工作专项(2013FY112100)

摘　　要：通过野外居群取样,结合实验室观察、标本检查及统计分析方法,研究了云南省腾冲县近光滑小檗主要分类学性状特征的变异式样。结果显示：（1）近光滑小檗叶片长度为1.95~12.91（5.54±2.15）cm,宽度为0.45~1.94（0.97±0.32）cm;单个簇生花序中花数目为2~14（5.1±2.2）个,花黄色,花被片数目为13~20（15.36±1.34）个;具蜜腺花被片为狭倒卵形至宽倒卵形,先端常缺裂,偶全缘,长3.18~5.94（4.82±0.52）mm,宽1.45~4.41（2.65±0.54）mm。（2）子房内胚珠数目及果实内种子数目都是1个;浆果椭圆形至卵状椭圆形,紫黑色,长3.37~8.36（6.91±0.82）mm,宽2.85~5.13（4.02±0.46）mm;果柄长0.47~2.20（1.10±0.32）cm。（3）在变异系数方面,簇生花序中花数目（0.37）〉叶长（0.21）〉叶宽（0.18）〉果柄长度（0.17）〉具蜜腺花被片宽度（0.14）〉具蜜腺花被片长度（0.08）=花被片数目（0.08）〉果长（0.07）=果宽（0.07）。（4）对《中国植物志》中近光滑小檗空缺的绘图补充了叶、花和果实等图片资料;并讨论了生境条件对近光滑小檗居群间变异的影响,及其与同域种卷叶小檗的种间关系。Variation patterns of main taxonomic characters of Berberis sublevis W.W.Smith were investigated by field population sampling in Tengchong County,Yunnan Province,Southwest China,in combination with laboratory observations,checking type specimens,and statistical analysis.The research results are shown as below.（1）The leaves were 1.95-12.91 cm long,mean±SD=5.54±2.15 cm,and 0.45-1.94 cm wide,mean±SD=0.97±0.32 cm.Number of flowers per flower fascicle was 2-14,mean±SD=5.1±2.2.Flowers yellow,with 13-20 tepals per flower,mean±SD=15.36±1.34.The tepals with 2 nectaries narrowly obovate to broadly obovate,apexes usually emarginate to notched,occasionally entire,3.18-5.94 mm long,mean±SD=4.82±0.52 mm,and 1.45-4.41 mm wide,mean±SD=2.65±0.54 mm.（2）All the ovaries and fruits contained only one ovule or just one seed.Berries ellipsoid to ovate ellipsoid,purplish black,3.37-8.36 mm long,mean±SD=6.91±0.82 mm,and 2.85-5.13 mm wide,mean±SD=4.02±0.46 mm.Length of the fruit stalks was 0.47-2.20 cm,mean±SD=1.10±0.32 cm.（3）Among the coefficients of variation,number of flowers per flower fascicle （0.37）〉length of leaves（0.21）〉width of leaves（0.18）〉length of fruit stalks（0.17）〉width of nectariferous tepals（0.14 ）〉length of nectariferous tepals（0.08）=tepal number per flower（0.08）〉length of fruits（0.07）= width of fruits（0.07）.（4）Several photos of leaves,flowers and fruits are provided to fill the gap of illustration absence of B.sublevis in Flora of China.Furthermore,the effects of habitat conditions on the morphological variations between populations of B.sublevis,and its relationships with a sympatric congener,B.replicata are also discussed.

关 键 词：近光滑小檗 叶 花被片 果实 变异系数 

分 类 号：Q944.1[生物学—植物学]