Effect of NH4-non the pigment content ofLaminaria japonica

Dong Liangfeng; Lin Guangheng; Wu Chaoyuan

doi:10.1007/BF02850445

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Effect of NH4-non the pigment content ofLaminaria japonica

Updated：2023-05-16

- Effect of NH4-non the pigment content ofLaminaria japonica
- Journal of Oceanology and Limnology Vol. 8, Issue 2, Pages: 128-134(1990)
- Affiliations：
  
  Institute of Oceanology
- Author bio：
- Funds：
- DOI：10.1007/BF02850445
  CLC：
- Published：1990
- Accepted：
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Liangfeng, D., Guangheng, L. & Chaoyuan, W. Effect of NH4-non the pigment content ofLaminaria japonica, ., Chin. J. Ocean. Limnol. 8, 128–134 (1990). https://doi.org/10.1007/BF02850445
DOI：

Liangfeng, D., Guangheng, L. & Chaoyuan, W. Effect of NH4-non the pigment content ofLaminaria japonica, ., Chin. J. Ocean. Limnol. 8, 128–134 (1990). https://doi.org/10.1007/BF02850445 DOI：

摘要

Abstract

Experiments withLaminaria japonica were conducted in Meidao Bay and Pier Bay

Qingdao

China

Nitrogen-starved plants were fertilized intermittently with 7.1 mM NH4−N solution for 1 hour at 3 day intervals

after which chlorophyll a

fucoxanthin

chlorophyll c and β-carotene contents were analyzed. Photosynthetic and growth rates of plants and nitrogen content of seawater were determined. their contents of chlorophyll a

fucoxanthin

chlorophyll c and β-carotene were 1.65

0.67

0.33 and 0.06 mg.dm−2 respectively

or 2.46

2.03

1.86 and 1.81 times those of the controls. The ratio of fucoxanthin to chlorophyll a in nitrogen-enriched plants was lower than that of the controls. Normal growth rate of the plants (2 cm·day−1 in length) were reached when the chlorophyll a content exceeded 0.1 mg·g−1 fresh wt.

indicating that chlorophyll a content can serve as an indicator of normal growth. Experimental results show that seawater is regarded as fertile for the normal growth ofLaminaria if the total inorganic nitrogen (including ammonium salt

nitrate and nitrite) content in seawater is about 2 μm

and infertile if less than 1 μm

in which case fertilizer should be applied.

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references

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