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Dergiler / Turkish Journal of Botany / 2013 / Cilt: 37 - Sayı: 1

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

Pawan Kumar RANA
Puneet KUMAR and Vijay Kumar SINGHAL
Sayfa
167–176
Yayın Tarihi
2013-01-01
DOI
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⚡ TL;DR(1 Cümlede Hızlı Çıkarım)

This paper discusses the consequences of chromosomal and spindle irregularities on the course of meiosis and microsporogenesis and ultimately on the end products.

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Amaç & Hipotez: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).
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Temel Bulgular & Veri: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%).
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Sonuç & Katkı:This paper discusses the consequences of chromosomal and spindle irregularities on the course of meiosis and microsporogenesis and ultimately on the end products.
🔬Tür:Araştırma Makalesi
📍Kapsam:Genişletilmiş Akademik Örneklem
⚙️Değişkenler:nonsynchronous condensation · intra-microsporal · jumbo pollen grains

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.

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Bu Makaleye Atıf Yap

RANA, P. K., SINGHAL, P. K. A. V. K. (2013). Spindle irregularities, chromatin transfer, and chromatin stickiness during male meiosis in Anemone tetrasepala (Ranunculaceae). Turkish Journal of Botany, Cilt: 37 - Sayı: 1, 167–176. https://ajindex.com/articles/183024

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Kaynakça (9)

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