摘要
采用扫描电镜对色季拉山区22种风毛菊属(Saussurea)植物花粉和1种须弥菊属(Himalaiella)植物花粉进行形态观察比较,了解花粉形态水平上的分化程度,同时进行聚类分析,以期为该属植物分类提供孢粉学依据,并进一步为该区风毛菊属植物的种质资源利用提供参考。结果表明:(1)23种植物花粉形状近球形有20种,扁球形有3种;大部分花粉体积属于中型花粉,总体为较进化类型。(2)除薄苞风毛菊(S.leptolepis)为四孔沟花粉外,其余22种植物花粉具三孔沟。(3)23种植物花粉外壁纹饰具体可分为7种类型:网状最多为7种、网状—颗粒状6种、穴状6种,而光滑状、刺基穴状及刺间具皱波状、颗粒状和褶皱状各有1种。(4)基于23种植物花粉微形态的聚类分析,与植物分类系统表现出一定的一致性,甚至在部分亚属间也相对清晰。结果表明花粉微形态特征可以为该属物种鉴定提供依据。
The pollen of 22 species of Saussurea and 1 species of Himalaiella were observed and compared by scanning electron microscopy to understand the degree of differentiation at the level of pollen morphology,and the pollen cluster analysis was carried out to provide a sporological basis for the classification of this genus,and further provided germplasm resources utilization of Saussurea in the region.The results showed that:(1)There were 20 species of 23 plants with subspherical pollen shape and three were oblate spherical;most of the pollen volume belonged to medium-sized pollen,and the overall type was relatively evolved.(2)Except for Saussurea Nephrolepis,which was a four-pore pollen,the pollen of the other 22 species had three pore grooves.(3)The outer wall ornamentation of pollen of 23 species could be divided into seven types:seven types of reticulate,six types of reticular and granular,six types of cavernous,and there were one smooth,one spine-based cavernous and one interspinous with wrinkled waves,one granular and one ruffled.(4)Cluster analysis based on pollen micromorphology of 23 plant species showed some consistency with the plant classification system and was even relatively clear among some subgenera.The results of this paper suggested that pollen micromorphological features might provide a basis for species identification in this genus.
作者
张淑钧
杨欣欣
罗建
ZHNAG Shujun;YANG Xinxin;LUO Jian(Institute of Plateau Ecology,Tibet Agricultural and Animal Husbandry University,Nyingchi 860000;Key Laboratory of Tibet Plateau Forest Ecology of Ministry of Education&National,Nyingchi 860000;Field Scientific Observation and Research Station of Tibet Nyingchi Mountane Forest Ecosystem,Nyingchi 860000;Key Laboratory of Alpine Vegetation Ecological Security of Husbandry University,Nyingchi 860000)
出处
《植物研究》
CAS
CSCD
北大核心
2023年第5期741-755,共15页
Bulletin of Botanical Research
基金
国家科技基础资源调查专项(2021FY100201)
第二次青藏高原综合科学考察研究(2019QZKK05020110)。
关键词
风毛菊属
色季拉山区
花粉微形态
聚类分析
西藏
Saussurea
the mountainous region of sedgera
pollen micromorphology
cluster analysis
Tibet
