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Ethene (ethylene) production in the marine macroalga Ulva (Enteromorpha) intestinalis L. (Chlorophyta, Ulvophyceae): effect of light-stress and co-production with dimethyl sulphide
Authors
Abeles F.B.
Donahue N.M.
+18 more
Fluhr R.
Fukuda H.
Ghooprasert P.
Guillard R.R.L.
Jeffrey S.W.
Karsten U.
Maillard P.
Markager S.
Ordog V.
Pandey S.
Shimokawa K.
Simo R.
Steinke M.
Stella L.
Tseng S.H.
Vanden Driessche T.
Watanabe T.
Zhang W.
Publication date
1 January 2005
Publisher
'Wiley'
Doi
Cite
Abstract
Ethene (ethylene; H2C = CH2) is one of a range of non-methane hydrocarbons (NMHC) that affect atmospheric chemistry and global climate. Ethene acts as a hormone in higher plants and its role in plant biochemistry, physiology and ecology has been the subject of extensive research. Ethene is also found in seawater, but despite evidence that marine microalgae and seaweeds can produce ethene directly, its production is generally attributed to photochemical breakdown of dissolved organic matter. Here we confirmed ethene production in cultured samples of the macroalga Ulva (Enteromorpha) intestinalis. Ethene levels increased substantially when samples acclimatized to low light conditions were transferred to high light, and ethene addition reduced chlorophyll levels by 30%. A range of potential inhibitors and inducers of ethene biosynthesis were tested. Evidence was found for ethene synthesis via the 1-aminocylopropane-1-acrylic acid (ACC) pathway and ACC oxidase activity was confirmed for cell-free extracts. Addition of acrylate, a potential ethene precursor in algae that contain the compatible solute dimethylsulphoniopropionate, doubled the ethene produced but no acrylate decarboxylase activity was found. Nonetheless the data support active production of ethene and we suggest ethene may play a multifaceted role in algae as it does in higher plants. © 2005 Blackwell Publishing Ltd
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