Microsporogenesis and Pollen Viability in Abies holophylla Maxim
2003
Kormutak, Andrej (Slovak Academy of Science, Nitra, Slovak Republic) | Lee, S.W. | Ham, S.D. | Hong, Y.P. (Korea Forest Research Institute, Suwon, Republic of Korea)
The first data have been presented concerning pollen development and viability in Abies holophylla. Under climatic conditions of the Korea Forest Research Institute the process microsporogenesis extends from the Mid-February till April 19. Frequenceis of meiotic irregularities averaged at 9.1% in two study trees as compared with 16.1% of abortive tetrads, 17.1% of abnormal pollen grains and 12.6% of disturbances during prothalial cell divisions. Cytologically, the most common types of meiotic irregularities were non-incorporated chromosomes into metaphase plates together with anaphase bridges and asynchronous movement of the chromosomes towards the poles of a microsporocyte.
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