|Authors: ||G.M. Dias-Tagliacozzo, A.F.C. Tombolato, I.F.M. Válio|
|Keywords: ||photoperiod, germination, flowering, vernalization.|
The market for Alstroemeria is growing in Brazil; however, production concentrates exclusively on imported Alstroemeria hybrids.
These are limited in their cultivation to certain periods of the year, even in mountain regions.
The aim of this work was to study environmental factors that could influence the germination, growth and flowering of a Brazilian cultivar, an unnamed Alstroemeria caryophyllaea hybrid that flourishes in tropical conditions.
Seed germination of this cultivar is indifferent to light or dark.
The rate of germination was different in seeds maintained at 25 °C and 17 °C, however the percentage of germination after 45 days was 88 and 82 %, respectively.
A temperature of 30 °C partially inhibited this process; only 50 % of seeds germinated at this temperature.
Rhizomes were maintained for 2, 4 and 8 weeks at 5 °C and 25 °C to evaluate the influence of vernalization.
It was observed that although flowering occurred independently from the temperature, the percentage of flowering plants was higher at 25 °C (70%) comparing to 5 °C (20%). It appears that cold has a negative effect on flowering of this cultivar.
Effect of photoperiod is qualitative in this cultivar.
All plants flowered at both photoperiods, plants maintained with short days (8h) bloomed before plants maintained with long days (18h).
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