Seasonal Pattern of Reproduction Of Hizikia Fusiformis (Sargassaceae, Phaeophyta) from Nanao Island, Shantou, China

Zou, Dinghui; Gao, Kunshan; Ruan, Zuoxi

doi:10.1007/s10811-006-9097-8

Cited by 28 publications

(21 citation statements)

References 23 publications

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“…thunbergii thalli began to mature in early summer and receptacles appeared as day length increased. Our observations were consistent with work by Uchida (1993) and Zou et al (2006), who showed that long days initiated maturation of some Sargassum species. Although there is evidence that receptacles form under shorter photoperiod conditions in some Sargassum species (De Wreede, 1976;Yoshida et al, 2001), gametes are not released until the photoperiod increases (Yoshida et al, 1998).…”

Section: Discussionsupporting

confidence: 93%

Phenological study of Sargassum thunbergii (Fucales, Phaeophyta) in Lidao Bay, Rongcheng, China

Liu

Zhan

et al. 2015

Chin. J. Ocean. Limnol.

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We conducted a phenological evaluation of Sargassum thunbergii , a common algal species, along the coast of Lidao Bay, Rongcheng, China. The local S . thunbergii population entered a maturation period from early June to mid-August, when seawater temperature was 14.4 to 25.1°C. Our results suggest an increase in temperature and day length during this period initiated thalli maturation. Inhabitants of the low tidal zone had higher thalli length and biomass compared with those from the mid-and high tidal zones. We observed a switch in the length frequency distribution and contribution of length classes to biomass between the small (<20 cm) and long (20-79.9 cm) length classes at the time of thallus maturity. This suggests there is a trade-off between sexual reproduction and vegetative regeneration.

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Section: Discussionsupporting

confidence: 93%

Phenological study of Sargassum thunbergii (Fucales, Phaeophyta) in Lidao Bay, Rongcheng, China

Liu

Zhan

et al. 2015

Chin. J. Ocean. Limnol.

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“…Size inequality would inevitably result in reproductive inequality of plants because size-dependent reproduction had been determined in many brown algae (Åberg 1996;Arenas and Fernández 1998;Zou et al 2006). The present observation that only 70% plants in natural population was fertile during the peak reproduction implied that the reproduction in S. thunbergii may be size-dependent (Fig.…”

Section: Discussionmentioning

confidence: 68%

Zygote-derived seedling production of Sargassum thunbergii: focus on two frequently experienced constraints in tank culture of seaweed

et al. 2011

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Mass collection of germlings and growth of fouling algae are two main constraints for the seedling production of Sargassum thunbergii. In this study, 65% and 40% of reproductive output (allocation of biomass to sexual reproductive tissue) for farmed and natural populations respectively, were recorded during peak reproduction. In terms of germlings per kilogram wet weight of plants, the farmed population gave a higher yield than the natural population (3.2×10 5 and 1.2×10 5 germlings kg -1 , respectively). These results indicate that farmed populations could be used as parental plants for germling collection in seedling production. During the experiment, fouling was controlled by jet washing and high-density seeding. A germling detachment of less than 10% was observed when, after 48 h of attachment, collectors were jet-washed with an intensity of 1 kg cm -2 . High-density seeding had adverse effects on length mean, size equality, and occurrence of branches of germlings. However, 30-50 individuals cm -2 are thought to be usable in the seedling production of S. thunbergii because of less density effects. Seedlings of>0.5 cm length could be achieved after 1 month of tank culture.

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“…An example of application of these results relates to the feasibility of growing seedlings in unshaded outdoor tanks. Direct solar irradiance on a sunny day at noon in May to June, when the reproduction event occurs, can reach 1800 μmol photons m −2 s −1 or higher (Zou et al 2006). Seedlings on collectors laid on the bottom in the outdoor tank with 50-cm water depth will certainly undergo photoinhibition (this investigation).…”

Section: Discussionmentioning

confidence: 93%

Cultivation of the brown alga Hizikia fusiformis (Harvey) Okamura: stress resistance of artificially raised young seedlings revealed by chlorophyll fluorescence measurement

Pang

Zhang²,

Zhao³

et al. 2007

J Appl Phycol

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Commercial farming of the intertidal brown alga Hizikia fusiformis (Harvey) Okamura in China and South Korea in the sea depends on three sources of seedlings: holdfast-derived regenerated seedlings, young plants from wild population and zygote-derived seedlings. Like many successfully farmed seaweed species, the sustainable development of Hizikia farming will rely on a stable supply of artificial seedlings via sexual reproduction under controlled conditions. However, the high rate of detachment of seedlings after transfer to open sea is one of the main obstacles, and has limited large-scale application of zygotederived seedlings. To seek the optimal condition for growing seedlings on substratum in land-based tanks for avoidance of detachment in this investigation, young seedlings were grown in both outdoor tanks exposed directly to sunlight and in indoor raceway tanks in reduced, filtered sunlight. Results showed that young seedlings, immediately after fertilization, could withstand a daily fluctuation of direct solar irradiance up to a level of 1800 μmol photons m −2 s −1 , and maintained a faster growth rate than seedlings grown in indoor tanks. Detailed experiments by use of chlorophyll fluorescence measurements further demonstrated that the overnight (12 h) recovery of optimal fluorescence quantum yield (F v /F m ) of seedlings after 1 h treatment at 40°C was 98%, and the 48 h recovery of F v /F m of seedlings after 1 h exposure to 1800 μmol m −2 s −1 was 92%. Forty-one-day-old seedlings showed no significant decrease of optimal fluorescence quantum yield at salinity ranging from 30 to 5 ppt for a treatment up to 17 h. Sixhour desiccation treatment did not have any influence on the optimal fluorescence quantum yield. Exposure to 18 mmol L −1 sodium hypochlorite for 10 min did not damage the PSII efficiency, and thus could be used to remove epiphytic algae. The strong tolerance of young seedlings to high temperature, high irradiance, low salinity and desiccation found in this investigation supports the view that mass production of Hizikia seedlings should be performed in ambient light and temperature instead of in shaded greenhouse tanks.

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Seasonal Pattern of Reproduction Of Hizikia Fusiformis (Sargassaceae, Phaeophyta) from Nanao Island, Shantou, China

Cited by 28 publications

References 23 publications

Phenological study of Sargassum thunbergii (Fucales, Phaeophyta) in Lidao Bay, Rongcheng, China

Phenological study of Sargassum thunbergii (Fucales, Phaeophyta) in Lidao Bay, Rongcheng, China

Zygote-derived seedling production of Sargassum thunbergii: focus on two frequently experienced constraints in tank culture of seaweed

Cultivation of the brown alga Hizikia fusiformis (Harvey) Okamura: stress resistance of artificially raised young seedlings revealed by chlorophyll fluorescence measurement

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