Spindle irregularities, chromatin transfer, and chromatin stickiness during male meiosis in Anemone tetrasepala (Ranunculaceae)

Pawan Kumar RANA; Puneet KUMAR and Vijay Kumar SINGHAL

doi:https://doi.org/10.3906/bot-1108-23

Article Details

Spindle irregularities, chromatin transfer, and chromatin stickiness during male meiosis in Anemone tetrasepala (Ranunculaceae)

Authors:

Pawan Kumar RANA | Puneet KUMAR and Vijay Kumar SINGHAL

Publisher:

TUBITAK

Main Topics:

Plants

Journal:

Turkish Journal of Botany 2013 Vol.37 Issue 1, pp.167-176

Document Type:

Article

Publication Date:

12/2012

Document Language:

English

Document ID (Org No.):

2000722859

Frequency:

Bimonthly

eISSN:

1303-6106

pISSN:

1300-008X

DOI:

https://doi.org/10.3906/bot-1108-23

Abstract:

 

Detailed cytological investigations performed in Anemone tetrasepala Royle from the Pangi Valley revealed the presence of various irregularities (spindle irregularities, chromatin transfer, chromatin stickiness, and nonsynchronous condensation of chromatin material) for the first time in the species that existed at diploid level (2n = 14). Spindle irregularities resulted in dyads, triads, polyads, and micronuclei in sporads during microsporogenesis and variable sized pollen grains and reduced fertility in pollen grains (85.38%). Direct fusion among proximate meiocytes resulted in the formation of syncyte pollen mother cells. Such syncytes yielded jumbo-sized pollen grains that were surely of unreduced nature in their genetic constitution. Due to severe chromosome stickiness, chromosome separation during anaphases was also affected. Another interesting observation was the nonsynchronous condensation of 1-2 chromosomes during anaphase-I. This paper discusses the consequences of chromosomal and spindle irregularities on the course of meiosis and microsporogenesis and ultimately on the end products.

Article Details

Spindle irregularities, chromatin transfer, and chromatin stickiness during male meiosis in Anemone tetrasepala (Ranunculaceae)

Authors: Pawan Kumar RANA | Puneet KUMAR and Vijay Kumar SINGHAL

Publisher: TUBITAK

Main Topics: Plants

Journal: Turkish Journal of Botany 2013 Vol.37 Issue 1, pp.167-176

Document Type: Article

Publication Date: 12/2012

Document Language: English

Document ID (Org No.): 2000722859

Frequency: Bimonthly

eISSN: 1303-6106

pISSN: 1300-008X

DOI: https://doi.org/10.3906/bot-1108-23

Issues

Authors:

Pawan Kumar RANA | Puneet KUMAR and Vijay Kumar SINGHAL

Publisher:

TUBITAK

Main Topics:

Plants

Journal:

Turkish Journal of Botany 2013 Vol.37 Issue 1, pp.167-176

Document Type:

Article

Publication Date:

12/2012

Document Language:

English

Document ID (Org No.):

2000722859

Frequency:

Bimonthly

eISSN:

1303-6106

pISSN:

1300-008X

DOI:

https://doi.org/10.3906/bot-1108-23