Salicylic acid and heat acclimation pretreatment protects Laminaria japonica sporophyte (Phaeophyceae) from heat stress

Bin Zhou; Xuexi Tang; You Wang

doi:10.1007/s00343-010-9049-7

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Salicylic acid and heat acclimation pretreatment protects Laminaria japonica sporophyte (Phaeophyceae) from heat stress

OriginalPaper | Updated：2023-05-16

- Salicylic acid and heat acclimation pretreatment protects Laminaria japonica sporophyte (Phaeophyceae) from heat stress
- Salicylic acid and heat acclimation pretreatment protects Laminaria japonica sporophyte (Phaeophyceae) from heat stress
- 海洋湖沼学报（英文） 2010年28卷第4期页码：924-932
- Affiliations：
  
  Laboratory of Ecology College of Marine Life Sciences Ocean University of China
- Author bio：
- Funds：
  
  Supported by the Open Funds of the Key Oceanic Science and Engineering Laboratory of National Bureau of Oceanography (MESE-2008-01);and the Specialized Research Program for Marine Public Welfare Industry, SOA (No. 200805066)
- DOI：10.1007/s00343-010-9049-7
  中图分类号：
- 网络首发：2010-06-29，
  
  纸质出版：2010
- Accepted：
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Salicylic acid and heat acclimation pretreatment protects Laminaria japonica sporophyte (Phaeophyceae) from heat stress[J]. 海洋湖沼学报（英文）, 2010,28(4):924-932.

Zhou, B., Tang, X. & Wang, Y. Salicylic acid and heat acclimation pretreatment protects Laminaria japonica sporophyte (Phaeophyceae) from heat stress., Chin. J. Ocean. Limnol. 28, 924–932 (2010). https://doi.org/10.1007/s00343-010-9049-7
Salicylic acid and heat acclimation pretreatment protects Laminaria japonica sporophyte (Phaeophyceae) from heat stress[J]. 海洋湖沼学报（英文）, 2010,28(4):924-932. DOI： 10.1007/s00343-010-9049-7.

Zhou, B., Tang, X. & Wang, Y. Salicylic acid and heat acclimation pretreatment protects Laminaria japonica sporophyte (Phaeophyceae) from heat stress., Chin. J. Ocean. Limnol. 28, 924–932 (2010). https://doi.org/10.1007/s00343-010-9049-7 DOI：

摘要

Abstract

Possible mediatory roles of heat acclimation and salicylic acid in protecting the sporophyte of marine macroalga Laminaria japonica (Phaeophyceae) from heat stress were studied. Heat stress resulted in oxidative injury in the kelp blades. Under heat stress significant accumulation of hydrogen peroxide (H2O2) and malonaldehyde (MDA)

a membrane lipid peroxidation product

and a drastic decrease in chlorophyll a content were recorded. Activity of the enzymatic antioxidant system was drastically affected by heat stress. The activity of superoxide dismutase (SOD) was significantly increased while peroxidase (POD)

catalase (CAT) and glutathione peroxidase (GPX) were greatly inhibited and

simultaneously

phenylalanine ammonia-lyase was activated while polyphenol oxidase (PPO) was inhibited. Both heat acclimation pretreatment and exogenous application of salicylic acid alleviated oxidative damage in kelp blades. Blades receiving heat acclimation pretreatment and exogenous salicylic acid prior to heat stress exhibited a reduced increase in H2O2 and MDA content

and a lower reduction in chlorophyll a content. Pretreatment with heat acclimation and salicylic acid elevated activities of SOD

POD

CAT

GPX and PPO. Considering these results collectively

we speculate that the inhibition of antioxidant enzymes is a possible cause of the heat-stress-induced oxidative stress in L. japonica

and enhanced thermotolerance may be associated

at least in part

with the elevated activity of the enzymatic antioxidant system.

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references

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