Laboratory manipulation of Gracilariopsis bailinae Zhang et Xia (Gracilariales, Rhodophyta)
![Thumbnail](https://repository.seafdec.org.ph/bitstream/10862/1600/4/1600-RabanalSF1997.pdf.jpg)
Tingnan/ Open
Request this document
Petsa
1997Page views
173Metadata
Ipakita ang buong tala ng itemCited times in Scopus
Share
Abstract
Carpospore germination, carposporeling development and tetraspore formation were investigated in Gracilariopsis bailinae Zhang et Xia by manipulating photoperiod, photon flux density, temperature, salinity and nutrients. Laboratory-generated sporelings attained mean growth rate from 4.05 to 10.31% d-1 during the first week of incubation. Duncan s multiple range test (DMRT) showed that growth rates were significantly different (P < 0.05) between the treatment combinations and between weekly intervals. The optimal condition for growth of sporelings, irrespective of culture age, was attained at treatment combinations of 26°C, 11:13 (h. L:D) photoperiod, 100 µEm-2s-1 photon flux density (PFD), 25 µM NH4Cl: 2.5 µM K2HPO4 and 25ppt salinity followed by a treatment combination of 26°C, 11:13 (h. L:D) photoperiod, 100 µEm-2s-1 photon flux density (PFD), 50 µM NH4Cl: 5 µM K2HPO4 and 25 ppt salinity. For the first time in this species, tetraspore formation was induced in the laboratory. The tetrasporophyte produced many tetraspores in almost all branches of the thallus grown at 26°C, 11:13 (h. L:D) photoperiod, 100 µEm-2 s-1, 25 µM NH4Cl: 2.5 µM K2HPO4 and at 30 ppt salinity while those grown at lower light, higher nutrient level and higher salinity had fewer tetraspores. No tetraspores were formed at a higher temperature (30°C), longer photoperiod (13:11 h. L:D), and at 25 ppt salinity and the plants remained vegetative from 4 to 7 months. Logistic regression analysis showed that tetrasporangial induction was significantly affected by nutrients and salinity (P < 0.05).
Suggested Citation
Rabanal, S. F., Azanza, R., & Hurtado-Ponce, A. (1997). Laboratory manipulation of Gracilariopsis bailinae Zhang et Xia (Gracilariales, Rhodophyta). Botanica Marina , 40(1-6), 547-556. https://doi.org/10.1515/botm.1997.40.1-6.547
Paksa
Taxonomic term
Mga koleksyon
- AQD Journal Articles [1222]
Related items
Showing items related by title, author, creator and subject.
-
Effect of a non-native freshwater goby invasion on spawning habitat use of two native freshwater gobies
Ito, Sayaka; Tamura, Yoshinobu; Sato, Akira; Onishi, Hidejiro; Shibuya, Masaki; Uchida, Yuki; Inoue, Mikio; Omori, Koji (Springer, 2021-10)We tracked the spawning habitat use of two native stream gobies (Rhinogobius fluviatilis and Rhinogobius nagoyae) before and during the invasion of a non-native goby (Rhinogobius sp. OR) and after its disappearance in the ... -
Report of the 2nd Sub-regional Technical Meeting on Effective Fisheries Management between Malaysia and Thailand
Southeast Asian Fisheries Development Center (Secretariat, Southeast Asian Fisheries Development Center, 2017)Report of the 2nd Sub-regional Technical Meeting on Effective Fisheries Management between Malaysia and Thailand, in Bangkok, Thailand, 25-26 July 2017 was prepared by the Secretariat of Southeast Asian Fisheries Development ... -
Report of the sub-regional technical meeting on effective fisheries management between Malaysia and Thailand
Southeast Asian Fisheries Development Center (Secretariat, Southeast Asian Fisheries Development Center, 2014)The Sub-regional Technical Meeting on Effective Fisheries Management between Malaysia and Thailand was convened in Penang, Malaysia from 14 to 15 May 2014. This Meeting transpired from the decision of the 4th Meeting of ...