Thermal stress response of a sterile mutant of Ulva pertusa (Chlorophyta)
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- KAKINUMA MAKOTO
- Laboratory of Marine Biochemistry
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- SHIBAHARA NAOKO
- Laboratory of Marine Biochemistry
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- IKEDA HANAKO
- Laboratory of Marine Biochemistry Fukui Prefectural Fisheries Experimental Station
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- MAEGAWA MIYUKI
- Laboratory of Phycology, Faculty of Bioresources, Mie University
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- AMANO HIDEOMI
- Laboratory of Marine Biochemistry
書誌事項
- タイトル別名
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- Thermal stress responses of a sterile mutant of Ulva pertusa (Chlorophyta).
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The thermal stress responses of a sterile mutant of the marine alga Ulva pertusa were investigated at 20°C and 30°C. The amounts of the photosynthetic pigments, β-carotene, chlorophylls a and b, lutein, neoxanthin, and violaxanthin, were 1.4-2.4 times higher in the 30°C-cultivated alga than in the 20°C-cultivated alga. The free amino acids, asparagine, aspartic acid, glutamine, glutamic acid, glycine, and serine, were abundant in the 20°C-cultivated alga, and increased 1.9-10.5-fold in response to thermal stress (30°C). Total carbon and nitrogen contents also increased in the 30°C-cultivated alga. Sodium dodecylsulfate-polyacrylamide gel electrophoretic patterns of total proteins extracted from both temperature-treated algae showed the increases of 20, 25, and 90 kDa proteins in the 30°C-cultivated alga. Isozyme assays for 20 enzymes showed a different banding pattern only in the case of glutamate dehydrogenase (GDH). Although it was observed that both temperature-treated algae possessed NAD+- and NADP+-specific GDH, the 30°C-cultivated alga had an additional NADP+-specific GDH (NADP-GDH). These results suggest that NADP-GDH compensates for the thermally induced decreases in nitrogen assimilation efficiency and thereby regulates nitrogen metabolism under conditions of temperature stress.
収録刊行物
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- Fisheries science
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Fisheries science 67 (2), 287-294, 2001
公益社団法人 日本水産学会
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詳細情報 詳細情報について
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- CRID
- 1390001204429185280
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- NII論文ID
- 130003742336
- 10008268635
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- NII書誌ID
- AA10993718
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- ISSN
- 14442906
- 09199268
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- NDL書誌ID
- 5750640
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- 本文言語コード
- en
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- データソース種別
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- JaLC
- NDL
- Crossref
- CiNii Articles
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- 抄録ライセンスフラグ
- 使用不可