The effects of salinity on seed germination and seedling development of the seagrass,<i>Zostera marina</i> L.

Liu Yunlong; Zhang Xuelei

doi:10.3969/j.issn.0253-4193.2016.02.010

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Liu Yunlong, Zhang Xuelei. The effects of salinity on seed germination and seedling development of the seagrass,Zostera marina L.[J]. Haiyang Xuebao, 2016, 38(2): 104-111. doi: 10.3969/j.issn.0253-4193.2016.02.010

Citation:

Liu Yunlong, Zhang Xuelei. The effects of salinity on seed germination and seedling development of the seagrass,Zostera marina L.[J]. Haiyang Xuebao, 2016, 38(2): 104-111. doi: 10.3969/j.issn.0253-4193.2016.02.010

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The effects of salinity on seed germination and seedling development of the seagrass,Zostera marina L.

doi: 10.3969/j.issn.0253-4193.2016.02.010

Liu Yunlong^1
,,
Zhang Xuelei²

1.
College of Environmental Science and Engineering, Ocean University of China, Qingdao 266100, China;Key Lab of Science and Engineering for Marine Ecology and Environment, State Oceanic Administration, Qingdao 266061, China
2.
First Institute of Oceanography, State Oceanic Administration, Qingdao 266061, China;Key Lab of Science and Engineering for Marine Ecology and Environment, State Oceanic Administration, Qingdao 266061, China

Received Date: 2015-08-11
Rev Recd Date: 2015-11-24

Abstract

Abstract

Critical habitats of Zostera marina beds have greatly declined and request studies of effective method(s) for rehabilitation. Seeds of Z. marina were collected from Sanggou Bay, Dongchudao, Rongcheng, Shandong, China, and the effects of acute salinity variation (0-30) on the seed germination and seedling development were studied in the laboratory, to provide information for the rehabilitation of seagrass bed with seed reproduction. The results showed that lowering salinity induced the germination rate of Z. marina seeds, with significance occurred at salinities 15 and lower, and the highest germination rate at salinity 0. Seeds germinated at salinities 0, 5 and 15 could develop into seedlings and survive, with the percentage and time period influenced by both germination salinity background and post-germination incubation salinity:(1) higher germination salinities promoted germinated seeds developing into seedlings and surviving better, (2) seedlings were established and continued growth and further development at post-germination incubation salinities 5-30, while 100% mortality occurred after various development at salinity 0 or 1. Seedling leaves presented net production of oxygen at salinities 5-30, with a trend of higher gross and net production of oxygen and higher respiration rates at higher salinities. The results indicated that Z. marina seeds could produce 24% or 12% of health seedlings within two months treatment of acute salinity variation, germinating at salinities 0 or 5 and developing at salinities 5-30, which presented a practical method of seagrass bed rehabilitation with Z. marina seeds.
- Zostera marinaL.,
- seagrass,
- seed,
- germination,
- seedling,
- salinity

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References(51)

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