ISSN:
1432-1793
Source:
Springer Online Journal Archives 1860-2000
Topics:
Biology
Notes:
Abstract The effects of cold-dark conditions on excystment ofAlexandriuin pseudogonyaulax (Biecheler) Horiguchi ex Yuki et Fukuyo (Gonyaulacales: Dinophyceae) resting cysts were studied for different lengths of time (0 to 120 d). Cyst populations of the same age were obtained by incubating a culture in a diluted growth medium. Cysts that were not exposed to cold-dark conditions showed a long dormancy period and low germination success. A high percentage of excystment, together with a rather synchronous germination, were observed for cysts exposed to cold-dark conditions for 40 to 100 d. Shorter (20 d) and longer (120 d) periods of storage in the cold-dark incubator lowered excystment success and germination synchrony. These results indicate that low temperatures and absence of light during the dormancy period are strongly effective, not only in enhancing germination success, but also in modulating and timing the whole excystment process.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF00993643
