INFLUENCE OF BIOTIC AND ABIOTIC FACTORS ON IN VITRO ROOTING STAGE OF PEAR

To obtain representative experimental results for pear cultivation, it was created 12 variants designed as bifactorial experience: Genotype (A.1 – ‘Argessis’, A.2 – ‘Monica’, A.3 – ‘Republica’) and Photoperiodism levels (B1 = 16 hour photo-periodism, for 35 days, B2 = 14 hour photoperiodism, for 35 days, B3 = 16 hour photo¬periodism after dark pre-treatment for 9 days, for 35 days, B4 = 14 hour photo¬periodism after dark pre-treatment for 9 days, for 35 days). The best results were obtained for ‘Monica’ and ‘Argessis’ varieties on variants V.3, V.4 and V.7 having a rooting degree of 74%. Note that on these variants rooting process took place in the dark pre-treatment with the first 9 days.
Cultivar ‘Republica’ which follows up the root level of between 66 to 68% was achieved under conditions of pretreatment with darkness in the first 9 days.
Highest level of rooted plants (74%) was achieved in conditions of dark pretreatment in first 9 days.
The results confirm that the cultivar is an important factor in rooting phase.
Equally importance had for the photoperiodism phase.

II Balkan Symposium on Fruit Growing

G. Teodorescu, A.C. Cosac, L.B. Frasin, S. Morarita

genotype, photoperiodism, cultivar, pear, rooting stage

https://doi.org/10.17660/ActaHortic.2013.981.78