Quiescence of coffee flower buds and observations on the influence of temperature and humidity on its release
After initiation, differentiation and development from October to February, flower buds of the material studied remained strongly quiescent for 30 to 60 days under existing field temperatures, photoperiods and light intensities. The quiescent buds in the pre-meiotic stage were deficit in moisture to the level of 8.61 to 16.14 . Supply of this moisture at humidity levels of 90.3 to 99.2 and at 21.1 to 27.9ðC released dormancy. Dormancy release hastened at increasing temperatures and humidities. Moderately high temperatures (30.3 to 33.2ðC) or low temperatures (15.3 to 18.0ðC) alone enhanced dormancy. The crucial role of temperature and moisture was seen when warm water treatment at 33.0ðC resulted in quick dormancy release. Growth correlation and p.m.c. meiosis found after dormancy break were normal both in the field and laboratory. Hybrids resembled the parents in dormancy aspect. Coffee flower bud dormancy found under South Indian conditions has been a useful adaptation to overcome drought
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| Format: | biblioteca |
| Published: |
1979
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| Subjects: | LATENCIA, INFLORESCENCIAS, TEMPERATURA, HUMEDAD, |
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