Effect of high light and desiccation on photosystem Ⅱ in the seedlings and mature plants of tropical seagrass <italic style="font-style: italic">Enhalus acoroides</italic> during low tide

Xingkai CHE; Hu LI; Litao ZHANG; Jianguo LIU

doi:10.1007/s00343-021-1170-2

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Effect of high light and desiccation on photosystem Ⅱ in the seedlings and mature plants of tropical seagrass Enhalus acoroides during low tide

Updated：2023-04-27

- Effect of high light and desiccation on photosystem Ⅱ in the seedlings and mature plants of tropical seagrass Enhalus acoroides during low tide
- Effect of high light and desiccation on photosystem Ⅱ in the seedlings and mature plants of tropical seagrass Enhalus acoroides during low tide
- 海洋湖沼学报（英文） 2023年41卷第1期页码：241-250
- Affiliations：
  
  1.CAS and Shandong Key Laboratory of Experimental Marine Biology, Center for Ocean Mega-Science, Institute of Oceanology, Chinese Academy of Sciences, Qingdao 266071, China
  2.Laboratory for Marine Biology and Biotechnology, Pilot National Laboratory for Marine Science and Technology(Qingdao), Qingdao 266237, China
- Author bio：
  
  Jianguo LIU, E-mail: jgliu@qdio.ac.cn
- Funds：
  
  the Strategic Priority Research Program of Chinese Academy of Sciences(XDB42000000);the National Natural Science Foundation of China(32071577);the International Partnership Program of Chinese Academy of Sciences(GJHZ2039);the Shandong Provincial Natural Science Foundation(ZR201911130493);the Taishan Industrial Experts Program(Tscy20200102);© Chinese Society for Oceanology and Limnology, Science Press and Springer-Verlag GmbH Germany, part of Springer Nature 2023
- DOI：10.1007/s00343-021-1170-2
  中图分类号：
- 收稿：2021-06-14，
  
  录用：2021-9-13，
  
  网络首发：2021-12-04，
  
  纸质出版：2023-01
- Accepted：
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Effect of high light and desiccation on photosystem Ⅱ in the seedlings and mature plants of tropical seagrass Enhalus acoroides during low tide[J]. 海洋湖沼学报（英文）, 2023,41(1):241-250.

Xingkai CHE, Hu LI, Litao ZHANG, et al. Effect of high light and desiccation on photosystem Ⅱ in the seedlings and mature plants of tropical seagrass Enhalus acoroides during low tide[J]. Journal of Oceanology and Limnology, 2023, 41(1): 241-250.
Effect of high light and desiccation on photosystem Ⅱ in the seedlings and mature plants of tropical seagrass Enhalus acoroides during low tide[J]. 海洋湖沼学报（英文）, 2023,41(1):241-250. DOI： 10.1007/s00343-021-1170-2.

Xingkai CHE, Hu LI, Litao ZHANG, et al. Effect of high light and desiccation on photosystem Ⅱ in the seedlings and mature plants of tropical seagrass Enhalus acoroides during low tide[J]. Journal of Oceanology and Limnology, 2023, 41(1): 241-250. DOI： 10.1007/s00343-021-1170-2.

摘要

Abstract

During low tide

the intertidal seagrass

Enhalus acoroides

is often exposed to high light and desiccation

which can seriously threaten its survival

at least partly by inhibiting photosystem Ⅱ (PSII) activity. The response of leaves of

E. acoroides

to high light and desiccation was compared for seedlings and mature plants. Results show that the resistance of seedling and mature leaves to high light was quite similar

but to desiccation was very different. Seedling leaves were more sensitive to desiccation than the mature plant leaves

but had better water retention. The damage of desiccation to seedling leaves was mainly caused by dehydration

whereas that to mature plant leaves was caused by hypersaline toxicity. The recovery rate of PSII of seedling leaves was significantly slower than that of the mature plants after the stresses disappeared

which may at least partly contribute to seedling mortality in the wild. In addition

compared to high light

desiccation seriously inhibited the recovery rate of PSII activities even if the leaves became fully rehydrated to their normal relative water content (RWC) in the following re-immersion. Desiccation inhibited the recovery rate of RC/CS

(reaction center per cross section (at

)) to decrease the production of assimilatory power

which maybe the cause of the slower PSII recovery in desiccation treatments. This study demonstrates that desiccation particularly coupling with high light have a very negative effect on the PSII of

E. acoroides

during low tide and the sensitivity of seedlings and mature plants to desiccation is significantly different

which have important reference significance to choose an appropriate transplanting depth where seedlings and mature plants of

E. acoroides

not only receive sufficient light for growth

but also that minimize desiccation stress during low tide.

关键词

Keywords

references

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Effect of high light and desiccation on photosystem Ⅱ in the seedlings and mature plants of tropical seagrass Enhalus acoroides during low tide

Effect of high light and desiccation on photosystem Ⅱ in the seedlings and mature plants of tropical seagrass Enhalus acoroides during low tide

DOI：10.1007/s00343-021-1170-2

摘要

Abstract

关键词

Keywords

references