Spermatozoid life-span of two brown seaweeds, Saccharina japonica and Undaria pinnatifida, as measured by fertilization efficiency

Jing Li; Shaojun Pang; Feng Liu; Tifeng Shan; Suqin Gao

doi:10.1007/s00343-013-2207-y

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Spermatozoid life-span of two brown seaweeds, Saccharina japonica and Undaria pinnatifida, as measured by fertilization efficiency

Updated：2023-05-16

- Spermatozoid life-span of two brown seaweeds, Saccharina japonica and Undaria pinnatifida, as measured by fertilization efficiency
- Journal of Oceanology and Limnology Vol. 31, Issue 4, Pages: 774-781(2013)
- Affiliations：
  
  1. Institute of Oceanology Chinese Academy of Sciences
  2. University of Chinese Academy of Sciences
- Author bio：
- Funds：
- DOI：10.1007/s00343-013-2207-y
  CLC：
- Online First：10 July 2013，
  
  Published：2013
- Accepted：
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Li, J., Pang, S., Liu, F. et al. Spermatozoid life-span of two brown seaweeds, Saccharina japonica and Undaria pinnatifida, as measured by fertilization efficiency., Chin. J. Ocean. Limnol. 31, 774–781 (2013). https://doi.org/10.1007/s00343-013-2207-y
DOI：

Li, J., Pang, S., Liu, F. et al. Spermatozoid life-span of two brown seaweeds, Saccharina japonica and Undaria pinnatifida, as measured by fertilization efficiency., Chin. J. Ocean. Limnol. 31, 774–781 (2013). https://doi.org/10.1007/s00343-013-2207-y DOI：

摘要

Abstract

During sexual reproduction of seaweeds

spermatozoid (sperm) discharge is triggered by chemical messengers (pheromones) released by the female gametes. The chemotactic ability of the sperm ensures fertilization success. Using unialgal male and female gametophyte material under designated standard gametogenesis testing (SGT) conditions

the potential life-span of the sperm of two seaweeds

Saccharina japonica and Undaria pinnatifida

was assessed by their ability to fertilize eggs. Results show that within 20-30 min after being discharged

sperm of both species could complete fertilization without an apparent decline in fertilization rate. Although fertilization rate 60–120 min after sperm discharge dropped significantly in both species

some sperm were viable enough to fertilize the eggs. In S. japonica

at 12°C

some sperm were able to fertilize eggs up to 12 h after discharge. In both species

egg discharge rates (EDR) in the male and female mixed positive controls were significantly higher than those of all the sperm-testing groups. Doubling the seeded male gametophytes of S. japonica in the SGT tests significantly increased the EDR

further confirming the effect of the presence of the male on the female in terms of facilitating egg discharge from oogonia.

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Keywords

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