EFFECT OF CONDITIONING METHODS, SEED CHARACTERISTICS AND ENVIRONMENT OF GERMINATION ON ARTICHOKE ACHENES

G. Damato, N. Calabrese
The objectives of this study were to determine if pre-plant seed conditioning with liquid and solid carriers would improve germination and any promotive effects should be retained throughout storage.
The experiment was conducted on seed of cultivar ‘044’ of different age (1, 2 and 3 years old). At harvest time central heads (CH) were separated from lateral ones (LH); in this way we had three lots of seeds: seeds from CH, seeds from LH and seeds from a mixture of CH+LH.
For matriconditioning seeds were mixed with the carrier Zonolite vermiculite n. 5 at the ratio of seed to carrier to water in the conditioning mixture of 2.4:1:1.2 (by weight) respectively. For osmoconditioning seeds were placed inside a glass box (110x80x60 mm) on two filter papers with PEG 8000 solution (-1.2 MPa). Immediately after osmoconditioning and matriconditioning part of seeds were germinated in Petri dishes and in trays and other ones were stored for 45 and 90 d at 13°C and sowed only in trays.
Environment of germination did not influence germination or emergence percentage (GEP) but “seeds” sown in trays showed improvement in all the other characteristics examined. Seed aging decreased GEP and increased the percentage of abnormal seedlings. Seed conditioning methods did not affect GEP immediately after treatment but after storage achenes osmoconditioned exhibit a lower emergence percentage (EP) and emergence value. Matriconditioning improved EP after storage in oldest achenes respect to control and osmoconditioning.
Damato, G. and Calabrese , N. (2012). EFFECT OF CONDITIONING METHODS, SEED CHARACTERISTICS AND ENVIRONMENT OF GERMINATION ON ARTICHOKE ACHENES. Acta Hortic. 942, 171-176
DOI: 10.17660/ActaHortic.2012.942.21
https://doi.org/10.17660/ActaHortic.2012.942.21
seed age, order of capitula, seed germination, germination value, T50
English

Acta Horticulturae