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:
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/s00343-010-9049-7DOI:
Salicylic acid and heat acclimation pretreatment protects Laminaria japonica sporophyte (Phaeophyceae) from heat stress
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.
关键词
Keywords
references
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