Knowledge Resource Center for Ecological Environment in Arid Area
DOI | 10.2478/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
![]() |
ISSN | 0006-3088 |
EISSN | 1336-9563 |
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。 |
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。