Knowledge Resource Center for Ecological Environment in Arid Area
DOI | 10.1508/cytologia.75.363 |
Male Meiosis, Microsporogenesis and Pollen Grain Study in Inula cuspidata CB Clarke (Asteraceae) | |
Kaur, Dalvir; Singhal, Vijay Kumar; Gupta, Raghbir Chand | |
通讯作者 | Singhal, Vijay Kumar |
来源期刊 | CYTOLOGIA |
ISSN | 0011-4545 |
出版年 | 2010 |
卷号 | 75期号:4页码:363-368 |
英文摘要 | Male meiosis, microsporogenesis and pollen grain studies have been made on 11 accessions of Inula cuspidata C. B. Clarke from the cold desert regions of the Kinnaur district, Himachal Pradesh, India. All the accessions share the same meiotic chromosome number,n=10. Out of these, 10 accessions show regular chromosome pairing resulting into normal 10 bivalents formation. The meiotic analysis in these accessions reveals that 2 bivalents are of comparatively large size. These large-sized bivalents in 6 accessions show abnormalities in their disjunctions resulting into laggards/bridges during anaphases/telophases and micronuclei in tetrads and consequently some pollen sterility. In one of the accessions of l. cuspidata scored from Tapri, meiotic course is irregular due to the presence of a high frequency of univalents during the first meiosis. These univalent chromosomes during subsequent stages of meiosis fail to organize at the spindle plate and remain scattered in the cytoplasm. Consequently, the majority of the PMCs in the accession depict irregular anaphases/telophases, formation of multiple nuclei and abnormal sporads (dyads, triads, polyads and tetrads with micronuclei). The accession forms a large number of malformed pollen grains consisting of unstained/sterile and heterogeneous sized stained/fertile pollen grains. The accession showing such a abnormal meiotic behaviour could be attributed to its hybrid nature where the chromosome of the 2 putative parents is left unpaired during earlier stages of prophase I. |
英文关键词 | I. cuspidata Male meiosis Univalents Pollen sterility Heterogeneous sized pollen grains |
类型 | Article |
语种 | 英语 |
国家 | India |
收录类别 | SCI-E |
WOS记录号 | WOS:000289383200005 |
WOS关键词 | CYTOLOGICAL INVESTIGATIONS ; INDIAN COMPOSITAE ; MUTANT |
WOS类目 | Cell Biology ; Genetics & Heredity |
WOS研究方向 | Cell Biology ; Genetics & Heredity |
资源类型 | 期刊论文 |
条目标识符 | http://119.78.100.177/qdio/handle/2XILL650/163798 |
作者单位 | Punjabi Univ, Dept Bot, Patiala 147002, Punjab, India |
推荐引用方式 GB/T 7714 | Kaur, Dalvir,Singhal, Vijay Kumar,Gupta, Raghbir Chand. Male Meiosis, Microsporogenesis and Pollen Grain Study in Inula cuspidata CB Clarke (Asteraceae)[J],2010,75(4):363-368. |
APA | Kaur, Dalvir,Singhal, Vijay Kumar,&Gupta, Raghbir Chand.(2010).Male Meiosis, Microsporogenesis and Pollen Grain Study in Inula cuspidata CB Clarke (Asteraceae).CYTOLOGIA,75(4),363-368. |
MLA | Kaur, Dalvir,et al."Male Meiosis, Microsporogenesis and Pollen Grain Study in Inula cuspidata CB Clarke (Asteraceae)".CYTOLOGIA 75.4(2010):363-368. |
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。