MICROSPOROGENESIS OF SOUR CHERRIES IN THE SKOPJE REGION
Four sour cherry varieties, Oblačinska, Sumadinka, Haimans, and Kelleris 14, were studied to determine the time, duration and regularity of microsporogenesis, as influenced by climatic conditions (temperature and rainfall) in Skopje, Macedonia.
Generally, microsporogenesis occurred during March, ~30 days before the beginning of bloom.
When the sum of daily average temperatures after 1 February was higher and the sum of rainfall was lower, microsporogenesis began earlier, caused by a shorter duration of meiosis.
In the Skopje region, microsporogenesis was active at daily average temperatures of 7 to 9 °C. As a result of certain irregularities during division, pollen mother cells had various numbers, from 1 to 5, of micronuclei in Telophase I and Telophase II. They were most often the cells with one nucleus.
Irregular microspores ranged from 8.5 to 14.5 %. Dominant were irregular tetrads with 1 micronucleus, fewer with 2 and 3 micronuclei, and 4 micronuclei were found only in Oblačinska. Among the polyads present were pentads and hexads, and the triads were between 0.2 and 1%. Microsporogenesis began earliest in Sumadinka and latest in Haimans; it was most regular in Kelleris 14 and most irregular in Oblačinska. Significant temperature variations and a dry period during meiosis in 1995 caused a higher incidence of irregularity in sour cherry pollen development.
Popovska, M., Angelova, E. and Popovski, B. (2005). MICROSPOROGENESIS OF SOUR CHERRIES IN THE SKOPJE REGION. Acta Hortic. 667, 111-116
DOI: 10.17660/ActaHortic.2005.667.14
https://doi.org/10.17660/ActaHortic.2005.667.14
DOI: 10.17660/ActaHortic.2005.667.14
https://doi.org/10.17660/ActaHortic.2005.667.14
Prunus cerasus, flowering, telophase, micronucleus, microspore, climatic conditions
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