Influence of the irradiance on phenols content and rooting of Ilex paraguariensis cuttings collected from adult plants.

TARRAGÓ, J; FILIP, R.; MROGINSKI, L.; SANSBERRO, P.

ACTA PHYSIOLOGIAE PLANTARUM

SPRINGER HEIDELBERG

Lugar: HEIDELBERG; Año: 2012

0137-5881

The influence of irradiance on phenolics contents and rooting of Ilex paraguariensis cuttings was studied. Results of the first experiment with stock plants under controlled irradiance conditions show that when the irradiance level increased from 1.5 to 100 % PPFD, the oxidation of cuttings raised from 19±11 to 88±4% (r2= 0.64). At the same time, a strong correlation was observed between total phenolics content and irradiance (r2= 0.7). In consequence, adventitious rooting diminished from 67±5 to 3±3% under full radiation (r2= 0.7). In the second experiment with stock plants subjected to field conditions the results showed that the rooting process is strongly affected by the genotype (P