Microsporogenesis of Sour Cherries in the Skopje Region

Popovska, M.; Angelova, Elizabeta; Popovski, B.

doi:10.17660/actahortic.2005.667.14

Cited by 2 publications

(4 citation statements)

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“…In our study, average number of PMCs with anomalies in Telophase I was from 41.01% (III/9) to 57.75% (XIII/1), while in Telophase II range of variation was narrower, from 43.11% (III/9) to 53.18% (II/2). Our results are pretty higher than those obtained by Popovska et al (2005) while studying micropsorogenesis of Oblacinska sour cherry in Macedonia. This discrepancy is probably due to different agroclimatic conditions.…”

Section: Discussioncontrasting

confidence: 77%

“…The high frequency of chromosomal irregularities is due at least in part to genetic effects background because each step in meiosis is genetically controlled, but it is also influenced by environmental factors (Dawe, 1998). External factors during differentiation of cherry flower buds, which occurs during the growing season prior to bloom, can significantly affect the process of microsporogenesis and pollen viability (Popovska et al, 2005). A greater number of abnormalities in 'Oblačinska' sour cherry clones were manifested in 2007 compared to 2006, with the exception of clone XIII/1 which showed a completely reversed result.…”

Section: Discussionmentioning

confidence: 99%

“…Meiotic irregularities during micro-sporogenesis that can result in different levels of infertility was previously studied by Dys (1984), Dirlewanger et al (2007), Chudíková et al (2012) and Iordache (2013). In cherries, varying degree of irregularities at meiosis observed in microsporogenesis has been correlated with pollen germination in vitro (Popovska et al, 2005). Therefore, an understanding of the microsporogenesis process in sour cherry and its relationship to pollen viability is important when choosing the most productive sour cherry cultivar for commercial production.…”

Section: Introductionmentioning

confidence: 99%

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Microsporogenesis and meiotic abnormalities in different ‘Oblačinska’ sour cherry (Prunus cerasus L.) clones

Akšić

Cerović

Erċışlı

et al. 2016

Flora

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The Oblačinska sour cherry (Prunus cerasus) is a mixture of different clones with similar tree and fruit characteristics that is indigenous to and widely planted in commercial orchards in Serbia. Sour cherry, including Oblačinska sour cherry clones, exhibits irregular meiosis which may contribute to low fruit set in some selections. The goal of this study was to examine the process of microsporogenesis and to determine if meiosis and its anomalies effect the in vitro pollen germination and pollen tube length in four 'Oblačinska' sour cherry clones that differ in fruit set and yields. All clones displayed varying degrees of chromosomal abnormalities in all meiosis sub-phases. The abnormalities became evident from late pachytene with more than half of the pollen mother cells (PMC) showing abnormal conjugation of chromosomes in metaphase I. The lowest number of PMCs with laggards was in clone III/9 and the highest in clone XIII/1. In second division, the univalent and multivalent association was observed at metaphase-II, the lagging and stickiness in anaphase-II, and the phenomenon persisted up to the microspore stage. In all four 'Oblačinska' clones, PMCs exhibited cytomixis phenomena, however, it was only observed in the second experimental year. Cytomixis differed among the four clones but was equally frequent in all stages of meiosis. The syncytia formed, most often consisted of 2-3 PMCs that were at the same phase of meiosis, and exhibited common cytoplasm and occasionally nuclear fusion. In vitro pollen germination and pollen tube length significantly differed between the clones. Most probably abnormalities during meiosis, regardless of the good results of pollen germination, influenced the reduced potential clones XI/3 and XIII/1.

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Section: Discussioncontrasting

confidence: 77%

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Microsporogenesis and meiotic abnormalities in different ‘Oblačinska’ sour cherry (Prunus cerasus L.) clones

Akšić

Cerović

Erċışlı

et al. 2016

Flora

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“…Studies conducted in Skopje, Macedonia showed the impact of temperature and drought on sour cherry microsporogenesis, which took place about 30 days before flowering (Popovska et al, 2005). Temperature fluctuation and drought during this time was related to irregularity in pollen mother cell division and therefore to disturbance of sour cherry pollen development.…”

Section: Introductionmentioning

confidence: 99%