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請使用永久網址來引用或連結此文件:
https://irlib.pccu.edu.tw/handle/987654321/48864
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| 題名: | Comparisons of Chlorophyll Fluorescence and Physiological Characteristics of Wheat Seedlings Influenced by Iso-Osmotic Stresses from Polyethylene Glycol and Sodium Chloride |
| 作者: | Lan, CY (Lan, Chiu-Yueh)
Lin, KH (Lin, Kuan-Hung)
Chen, CL (Chen, Chun-Liang)
Huang, WD (Huang, Wen-Dar)
Chen, CC (Chen, Chang-Chang) |
| 貢獻者: | 園生系 |
| 關鍵詞: | wheat
Triticum aestivum
salt stress
osmotic stress
APX activity |
| 日期: | 2020-03 |
| 上傳時間: | 2020-12-10 14:40:17 (UTC+8) |
| 摘要: | Wheat (Triticum aestivum) cultivar Taichung SEL.2 (TCS2) is a salt-tolerance variety, but the mechanism involved remains unclear. This study aims to distinguish between the non-ionic osmotic and salt-mediated physiological effects on TCS2. Osmotic agents polyethylene glycol (PEG) and sodium chloride (NaCl) were applied at three iso-osmotic levels, level 1 containing 24% (w/v) PEG and 200 mM NaCl, level 2 containing 26.5% (w/v) PEG and 250 mM NaCl), and level 3 containing 29% (w/v) PEG and 300 mM NaCl, respectively. According to the investigation of chlorophyll fluorescence in the better NaCl-treated seedlings, maximal quantum yield of photosystem II (PSII) (F-v/F-m) and significant higher effective quantum yield of PSII (Phi(PSII)) at level 3 were observed. Meanwhile, the non-photochemical quenching of PSII (NPQ) and the quantum yield of regulated energy dissipation of PSII [Y(NPQ)] were significantly higher in the NaCl-treated seedlings, and the quantum yield of non-regulated energy dissipation of PSII [Y(NO)] in the NaCl-treated seedlings was lower than the PEG-treated ones at level 2 and level 3. Furthermore, the less extensive degradation of photosynthetic pigments, the better ascorbate peroxidase (APX) activity and the less accumulation of malondialdehyde (MDA) were also observed in NaCl-treated seedlings. In the morphological traits, shoot elongation in NaCl-treated seedlings was also preserved. These results suggest that TCS2 is more resistant to NaCl-induced osmotic stress than to the PEG-induced stress. This study contributes to plant breeder interest in drought- and/or salt-tolerant wheat varieties. |
| 關聯: | AGRONOMY-BASEL 卷冊: 10 期: 3 文獻號碼: 325 |
| 顯示於類別: | [園藝暨生物技術學系] 期刊論文
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