Pre-metaphase stretch is a term first coined by the preeminent cell biologist Sally Hughes-Schrader in 1950 to describe an elongation of prometaphase chromosomes observed primary spermatocytes phasmid insects and praying mantids. Research from many groups since Hughes-Schrader’s initial observation has revealed reasons for both how why might elongate prior metaphase. In this review, we findings...

A traditional karyomorphological approach was carried out in order to investigate the cytotaxonomic relationships among species of Santolina chamaecyparissus complex. All 14 included this complex were analysed for a total 39 populations. Metaphase plates obtained by squashing root tips stained with Feulgen technique. Measurable metaphase available literature also re-analysed. Chromosome number ...

Ma bamboo (Dendrocalamus latiflorus Munro) is a major species cultivated in southern China with high economic, ecological, and social value. However, highly dense forests reasonable structures have unclear adverse effects on light transmittance forest productivity that are not adequately understood. Here, we investigated varied light-intensity treatments during different phases of shoot emergen...

objective: mitochondria is a critical organelle within the cell and has important role in the oocyte development, thus the aim of this study was the comparison of mitochondrial distribution within the mouse oocyte at germinal vesicle (gv), germinal vesicle breakdown (gvbd) and metaphase ii (mii) stages using laser confocal microscopy (lscm). materials and methods: after superovulation of adult...

Although securin/separase/cohesion pathway was reported to regulate chromosome segregation during meiotic metaphase-to-anaphase transition, little biochemical evidence was provided. We recently found that oocytes could not progress beyond meiotic metaphase when ubiquitin-proteasome pathway was inhibited, but the mechanisms remain unclear. In the present study, we investigated the quantity of se...

Mitosis entails mechanistic changes required for maintaining the genomic integrity in all dividing cells. The process is intricate and temporally spatially regulated by ordered series of activation de-activation protein kinases. mitotic kinases ensure stepwise progression entry into mitosis after G2 phase cell cycle, followed prophase, pro-metaphase, metaphase, anaphase, telophase, subsequently...