Arid
DOI10.2478/s11756-011-0033-2
Persistent occurrence of meiotic abnormalities in a new hexaploid cytotype of Thalictrum foetidum from Indian cold deserts
Singhal, Vijay Kumar; Rana, Pawan Kumar; Kumar, Puneet; Kaur, Dalvir
通讯作者Singhal, Vijay Kumar
来源期刊BIOLOGIA
ISSN0006-3088
EISSN1336-9563
出版年2011
卷号66期号:3页码:458-464
英文摘要

Thalictrum foetidum L. (Ranunculaceae), a morphologically variable and widely distributed species of temperate and alpine Himalayas is worked out cytologically for the first time from India. Earlier studies from outside India were restricted to chromosome counts and karyotypic analysis. We studied the male meiosis, microsporogenesis and pollen viability in the wild accessions from the cold deserts of Lahaul-Spiti, Kinnaur and Pangi Valley of Himachal Pradesh. Present cytomorphological surveys in the species record the existence of two distinct morphotypes involving plant size; colour and size of leaf/leaflet; dentation of leaflet lobes; and degree of leaf pubescence. All the accessions in the two morphovariants share the same meiotic chromosome number (n = 21) and adds a new intraspecific hexaploid cytotype. The accessions show the phenomenon of cytomixis involving transfer of chromatin material among proximate pollen mother cells (PMCs) and associated meiotic abnormalities like, out of plate bivalents, interchromosomal connections, and laggards, bridges and micronuclei at anaphases/telophases. Microsporogenesis results into abnormal sporads (tetrads with micronuclei, dyads, triads and polyads). The products of such sporads resulted into some pollen sterility and pollen grains of heterogeneous sizes. The persistent occurrence of phenomenon of cytomixis and associated meiotic abnormalities and consequently pollen sterility and pollen grains of heterogeneous sizes in the hexaploid cytotype of T. foetidum seems to be under some genetic factors associated with the genome.


英文关键词cytomixis cytotype heterogeneous sizes pollen grains laggards micronuclei micropollen
类型Article
语种英语
国家India
收录类别SCI-E
WOS记录号WOS:000289288000013
WOS关键词SIZED POLLEN GRAINS ; HAM. EX DC. ; L. RANUNCULACEAE ; MOTHER CELLS ; MALE MEIOSIS ; CYTOMIXIS
WOS类目Biology
WOS研究方向Life Sciences & Biomedicine - Other Topics
资源类型期刊论文
条目标识符http://119.78.100.177/qdio/handle/2XILL650/167365
作者单位Punjabi Univ, Dept Bot, Patiala 147002, Punjab, India
推荐引用方式
GB/T 7714
Singhal, Vijay Kumar,Rana, Pawan Kumar,Kumar, Puneet,et al. Persistent occurrence of meiotic abnormalities in a new hexaploid cytotype of Thalictrum foetidum from Indian cold deserts[J],2011,66(3):458-464.
APA Singhal, Vijay Kumar,Rana, Pawan Kumar,Kumar, Puneet,&Kaur, Dalvir.(2011).Persistent occurrence of meiotic abnormalities in a new hexaploid cytotype of Thalictrum foetidum from Indian cold deserts.BIOLOGIA,66(3),458-464.
MLA Singhal, Vijay Kumar,et al."Persistent occurrence of meiotic abnormalities in a new hexaploid cytotype of Thalictrum foetidum from Indian cold deserts".BIOLOGIA 66.3(2011):458-464.
条目包含的文件
条目无相关文件。
个性服务
推荐该条目
保存到收藏夹
导出为Endnote文件
谷歌学术
谷歌学术中相似的文章
[Singhal, Vijay Kumar]的文章
[Rana, Pawan Kumar]的文章
[Kumar, Puneet]的文章
百度学术
百度学术中相似的文章
[Singhal, Vijay Kumar]的文章
[Rana, Pawan Kumar]的文章
[Kumar, Puneet]的文章
必应学术
必应学术中相似的文章
[Singhal, Vijay Kumar]的文章
[Rana, Pawan Kumar]的文章
[Kumar, Puneet]的文章
相关权益政策
暂无数据
收藏/分享

除非特别说明,本系统中所有内容都受版权保护,并保留所有权利。