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» Action C4. Collection of yew seeds and obtaining seedlings Life TAXUS

Action C4. Collection of yew seeds and obtaining seedlings

Objective

The aim of the action is the yew restoration through restocking, where natural regeneration is insufficient or non-existent. Taxus baccata seedlings produced in nursery from local material (fruits harvested yew) to ensure the genetic origin of seedlings will be used.

Actions

Yew seed collection in the plantation areas, hibernation in a refrigerator and preparation for germination in greenhouse under controlled irrigation.

Getting seedlings from yew berries collected in each area. These seedlings will be acclimated to clonal orchards in the areas of the yew forests (Action C5) to be planted around the yew forests of Cardó, Serra de Llaberia, Poblet and Alta Garrotxa (Action C6).

Results

28.000 viable seeds were collected in 2012 and 2013. Of these, 541 seedlings germinated in 2014 and about 3188 were expected to the spring of 2015. Click here for more information


Thus, production was up to 3,000 seedlings in nursery, which will be planted in various yew forests, within the livestock exclusion fencing, where no regeneration is observed or by the technique of “plants tutors” that are already present in the habitat. This technique was applied for the first time in a fully Mediterranean context, adapting the structure and water stress conditions habitat in this region

Zones

Yew forests of Cosp (Rasquera, Cardó), Serra de Llaberia, Poblet and Alta Garrotxa.

Calendar

Fall 2012 – Spring 2015

Harvest

We have collected yew berries during the 2012 and 2013 falls in four different places (Garrotxa, Llaberia, Poblet and Rasquera-Cardó). Objective: to reach 3500 seedlings.

IMG_6301 teix Misaclos 2012 016_2 teix Misaclos 2012 025_2
Seed treatment in the laboratory

Removing fruit cover (aril) in the laboratories of the CTFC. Treatment of seeds with sulfuric acid diluted 1/3 in order to break dormancy; washed with water and placed in a cold room at  4 °C for four months.

Extraccio aril i preparat sembra (11) CIEF (3) CIEF (10)
Germination nursery at the Agricultural Training School (Escola de Capacitació Agrària, ECA) in Olius.  Spring 2014 and 2015
Extraccio aril i preparat sembra (23) Extraccio aril i preparat sembra (29) CIEF (14)

With the collaboration of Dr. Xavier García (CIEF)

Testing of seed viability

The tetrazolium test indicated an average of 62% of viable seeds in fruits collected in 2014. Enough to reach the goals. 

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