Germination behaviour of Briza maxima L. seeds was studied in relation to different environmental parameters. The influence of harvesting time and after-ripening time of the seeds were also considered. Caryopses were collected at maturity at the beginning and end of June (harvest1 and harvest2) from wild populations located at the Orbetello Lagoon (Italy) and were germinated in deionized water or NaC 1 solutions at 10, 20 and 30 degrees C in the dark or under 12/12 h photoperiod. The results obtained showed that: (i) immediately after collection, germination rate was higher for harvest 2 seeds, (ii) seed germination was not significatively affected by the light; (iii) optimum temperature was at 20 degrees C, at which germination started earlier, (iv) germination percentages at 10 days of culture progressively increased during 6 months of after-ripening; (v) the presence of NaCl in the culture medium reduced the germination rates (above all of harvest1 seeds) and seedling growth, but did not induce damage (e.g. necrosis of the root tip).
Germination of Briza maxima L. seeds: effects of temperature, light, salinity and seed harvesting time
LOMBARDI, TIZIANA;ONNIS, ANTONINO
1998-01-01
Abstract
Germination behaviour of Briza maxima L. seeds was studied in relation to different environmental parameters. The influence of harvesting time and after-ripening time of the seeds were also considered. Caryopses were collected at maturity at the beginning and end of June (harvest1 and harvest2) from wild populations located at the Orbetello Lagoon (Italy) and were germinated in deionized water or NaC 1 solutions at 10, 20 and 30 degrees C in the dark or under 12/12 h photoperiod. The results obtained showed that: (i) immediately after collection, germination rate was higher for harvest 2 seeds, (ii) seed germination was not significatively affected by the light; (iii) optimum temperature was at 20 degrees C, at which germination started earlier, (iv) germination percentages at 10 days of culture progressively increased during 6 months of after-ripening; (v) the presence of NaCl in the culture medium reduced the germination rates (above all of harvest1 seeds) and seedling growth, but did not induce damage (e.g. necrosis of the root tip).I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
