PSS
Pre-Sprouted Seeds. The technique's basic foundation is the use of the meristem – multiplication tissue that makes up the buds – extracted in different ways and can also be developed through the use of tissue culture. The extraction of buds and, consequently, meristems is carried out mechanically or manually, undergoing thermal and chemical treatments, and then placed in germination chambers with temperature and humidity control. After germination, which occurs within a period of 10 to 15 days, the resulting seedlings are transplanted directly into trays or tubes, where they complete the cycle, which lasts around 60 days. Planting can be done using ratchets or with tractor-driven mechanical transplanters, already available on the market. PSS must be produced by specialized nurserymen in seedling production using high-quality genetic materials with traceability, with all phytosanitary controls to prevent the spread of pests and diseases, and in compliance with current legislation.