Non-reduction processes caused by chilling during coffee trees microsporogenesis
In this study, we wanted to determine the effect of chilling on the various stages of meiosis. We then determined its effect on the rest of pollen morphogenesis up to pollen maturity. It was possible to achieve this because of the relatively synchronous development of the floral buds of the coffee tree. Five clones of Coffea canephora were tested by chilling for various lenghts of time (one or two days) at 12 grade C. Similar results were obtained each time. We have chosen to describe in detail a three-day chilling treatment at 8 grades C of clone 126. Results, description of microsporogenesis from floral induction to anthesis under natural conditions and synchronism of the flowering of buds of the same size in clone 126. Disturbances caused by chilling during microsporogenesis
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| Format: | biblioteca |
| Published: |
Oct-
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| Subjects: | COFFEA, DIVISION CELULAR, TEMPERATURA, FRIO, GENETICA, MORFOGENESIS, POLEN, MEIOSIS, MITOSIS, MICROSPOROGENESIS, |
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| Summary: | In this study, we wanted to determine the effect of chilling on the various stages of meiosis. We then determined its effect on the rest of pollen morphogenesis up to pollen maturity. It was possible to achieve this because of the relatively synchronous development of the floral buds of the coffee tree. Five clones of Coffea canephora were tested by chilling for various lenghts of time (one or two days) at 12 grade C. Similar results were obtained each time. We have chosen to describe in detail a three-day chilling treatment at 8 grades C of clone 126. Results, description of microsporogenesis from floral induction to anthesis under natural conditions and synchronism of the flowering of buds of the same size in clone 126. Disturbances caused by chilling during microsporogenesis |
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