Photosynthetic responses of thalli and isolated protoplasts of Bryopsis hypnoides (Bryopsidales, Chlorophyta) during dehydration

Fang Lü; Guangce Wang; Haochen Jin

doi:10.1007/s00343-011-0028-4

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Photosynthetic responses of thalli and isolated protoplasts of Bryopsis hypnoides (Bryopsidales, Chlorophyta) during dehydration

OriginalPaper | Updated：2023-05-16

- Photosynthetic responses of thalli and isolated protoplasts of Bryopsis hypnoides (Bryopsidales, Chlorophyta) during dehydration
- Photosynthetic responses of thalli and isolated protoplasts of Bryopsis hypnoides (Bryopsidales, Chlorophyta) during dehydration
- 海洋湖沼学报（英文） 2011年29卷第2期页码：334-342
- Affiliations：
  
  1. Institute of Oceanology Chinese Academy of Sciences
  2. Graduate University of Chinese Academy of Sciences
  3. College of Marine Science and Engineering Tianjin University of Science and Technology
- Author bio：
- Funds：
  
  Supported by the National Natural Science Foundation of China (Nos. 30970302, 40806063, 30830015, B49082401)
- DOI：10.1007/s00343-011-0028-4
  中图分类号：
- 网络首发：2011-03-02，
  
  纸质出版：2011
- Accepted：
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Photosynthetic responses of thalli and isolated protoplasts of Bryopsis hypnoides (Bryopsidales, Chlorophyta) during dehydration[J]. 海洋湖沼学报（英文）, 2011,29(2):334-342.

Lü, F., Wang, G. & Jin, H. Photosynthetic responses of thalli and isolated protoplasts of Bryopsis hypnoides (Bryopsidales, Chlorophyta) during dehydration., Chin. J. Ocean. Limnol. 29, 334–342 (2011). https://doi.org/10.1007/s00343-011-0028-4
Photosynthetic responses of thalli and isolated protoplasts of Bryopsis hypnoides (Bryopsidales, Chlorophyta) during dehydration[J]. 海洋湖沼学报（英文）, 2011,29(2):334-342. DOI： 10.1007/s00343-011-0028-4.

Lü, F., Wang, G. & Jin, H. Photosynthetic responses of thalli and isolated protoplasts of Bryopsis hypnoides (Bryopsidales, Chlorophyta) during dehydration., Chin. J. Ocean. Limnol. 29, 334–342 (2011). https://doi.org/10.1007/s00343-011-0028-4 DOI：

摘要

Abstract

Bryopsis hypnoides Lamouroux is a unique intertidal siphonous green alga whose extruded protoplasm can aggregate spontaneously in seawater to form numerous new cells that can develop into mature algal thalli. In this study

the photosynthetic responses during dehydration of both the thalli and protoplasts isolated from B. hypnoides were measured using a Dual-PAM (pulse amplitude modulation)-100 fluorometer. The results show that the photosynthetic rates of B. hypnoides thalli were maintained for an initial period

beyond which continued desiccation resulted in reduced rates of PSI and PSII. However

the photosynthetic performances of the isolated protoplasts dehydrated in air (CO2 concentration 600–700 mg/L) showed a slight increase of Y(II) at 20% water loss

but the rates decreased thereafter with declining water content. When protoplasts were dehydrated in CO2 deficient conditions (CO2 concentration 40–80 mg/L)

the values of Y(II) declined steadily with increased dehydration without an initial rise. These results indicated that the thalli and isolated protoplasts of this alga can utilize CO2 in ambient air effectively

and the photosynthetic performances of the isolated protoplasts were significantly different from that of the thalli during dehydration. Thus the protoplasts may be an excellent system for the study of stress tolerance.

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references

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