不同发育时期勃氏甜龙竹叶片植硅体含量及型态变化特征  

Variation of the Phytolith Content and Morphology in Dendrocalamus brandisii Leaf at Different Growth Stages

作　　者：谢东伯 段思源 陈哲 王曙光 王昌命 詹卉 Xie Dongbo;Duan Siyuan;Chen Zhe;Wang Shuguang;Wang Changming;Zhan Hui(College of Forestry,Southwest Forestry University,Kunming Yunnan 650233,China;Yunnan Institute of Forest Inventory and Planning,Kunming Yunnan 650051,China)

机构地区：[1]西南林业大学林学院,云南昆明650233 [2]云南林业调查规划院,云南昆明650051

出　　处：《西南林业大学学报(自然科学)》2025年第1期198-204,共7页Journal of Southwest Forestry University:Natural Sciences

基　　金：云南省农业联合基础研究面上项目(202101BD070001-114)资助;国家自然科学基金项目(32160415)资助;“云南省兴滇英才支持计划”项目资助。

摘　　要：为了解不同发育时期勃氏甜龙竹叶片植硅体的含量及型态变化,对不同秆龄及相同秆龄不同发育时期的勃氏甜龙竹叶片硅和植硅体含量进行测定,并对植硅体型态进行显微观察。结果显示:不同秆龄勃氏甜龙竹叶片中硅含量表现为1年生(5.93%)<2年生(10.30%)<3年生(15.25%),各秆龄中老叶硅含量均显著高于成熟叶和嫩叶;植硅体含量与硅含量变化趋势一致;不同秆龄及相同秆龄不同发育时期叶片均观察到尖型、方型、杆型、扇型、哑铃型、鞍型6种类型植硅体;哑铃型、杆型和鞍型植硅体占比超过植硅体总数的70%以上;除哑铃型植硅体,其他5种类型植硅体占比均随着秆龄增大呈增加趋势;哑铃型和鞍型植硅体长宽值变化差异不显著,是较稳定的植硅体型态。To investigate the variation of phytolith content and morphotypes in Dendrocalamus brandisii at different growth stages,the silicon and phytolith contents in the leaves of D.brandisii at different culm ages and leaves of different growth stages at the same culm age were analyzed,and the phytoliths were observed and identi-fied under microscope.The results showed the silicon content in D.brandisii leaves at different culm ages varied in the order of the 1st-year(5.93%)<2nd-year(10.30%)<3rd-year(15.25%).The silicon content of the old leaves in each culm age group was significantly higher than that of mature and young leaves.The phytolith content demonstrated the same variation trend as that silicon content.Phytolith morphotypes in D.brandisii leaves at dif-ferent growth stages were identical and grouped into 6 morphotypes,viz.acute bulbosus,blocky,elongate entire,bulliform flabellate,bilobate and saddle.The phytolith assemblage was all characterized by a high frequency of bilobate,elongate entire and saddle,accounting for more than 70%of the total.Except bilobate phytolith,the proportion of other 5 phytolith morphotypes increased with the increase of culm age.The variation for the size of bi-lobate and saddle phytoliths was insignificant,indicating bilobate and saddle phytoliths were considerably stable phytolith morphotypes.

关 键 词：勃氏甜龙竹 竹叶 硅含量 植硅体 型态 

分 类 号：S795.6[农业科学—林木遗传育种]