論文 - 詳細
| RRC ID | 20783 |
|---|---|
| 著者 | Nagao M, Matsui K, Uemura M. |
| タイトル | Klebsormidium flaccidum, a charophycean green alga, exhibits cold acclimation that is closely associated with compatible solute accumulation and ultrastructural changes. |
| ジャーナル | Plant Cell Environ |
| Abstract |
To elucidate the fundamental mechanisms and subsequent evolutionary aspects of plant cold acclimation, we examined the effect of cold acclimation on freezing tolerance in Klebsormidium flaccidum, a green alga belonging to Charophyceae, a sister group of land plants. Freezing tolerance of K. flaccidum was significantly enhanced by cold treatment: survival increased from 15% at -10 degrees C when grown at 18 degrees C to 55 and 85% after exposure at 2 degrees C for 2 and 7 d, respectively. Accompanying the development of freezing tolerance, soluble sugars (glucose and sucrose), a putative glycoside and amino acids, including gamma-aminobutyric acid (GABA), accumulated to high levels in the alga, suggesting that these solutes play a crucial role in the cold acclimation of K. flaccidum. Interestingly, the application of abscisic acid (ABA) did not change the freezing tolerance of the alga. We also observed changes in cell structure, including increased numbers and sizes of starch grains in chloroplasts, chloroplast enlargement, vacuole size reduction and cytoplasmic volume increase. These results suggest that K. flaccidum responds well to cold treatment and develops freezing tolerance in a process comparable to that of land plants. |
| 巻・号 | 31(6) |
| ページ | 872-85 |
| 公開日 | 2008-6-1 |
| DOI | 10.1111/j.1365-3040.2008.01804.x |
| PII | PCE1804 |
| PMID | 18315534 |
| MeSH | Abscisic Acid / pharmacology Acclimatization / physiology* Amino Acids / metabolism Carbohydrate Metabolism Carbohydrates / chemistry Chlorophyta / drug effects Chlorophyta / physiology* Chlorophyta / ultrastructure* Freezing |
| IF | 6.362 |
| 引用数 | 46 |
| WOS 分野 | PLANT SCIENCES |
| オルトメトリクス指標 |
オルトメトリクス指標項目
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| 最多言及媒体 | Patent(IFI CLAIMS) |
| 各媒体での言及数の合計 | 1 |
| 過去6か月間でのオルトメトリクス指標の変動値 | 3.0 |
| リソース情報 | |
| 藻類 | NIES-2408 |