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頁籤選單縮合
題名 | 外施一氧化氮對甜椒幼苗鹽分逆境之影響=Effect of Exogenously Applied Nitric Oxide on Sweet Pepper Seedlings under Salt-stress |
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作 者 | 劉仲維; 蘇瑞媛; 林宏益; 尤進欽; | 書刊名 | 植物種苗 |
卷期 | 13:3 2011.09[民100.09] |
頁次 | 頁31-51 |
分類號 | 435.27 |
關鍵詞 | 活性氧化物; 脂質過氧化反應; 抗氧化酵素; 甜椒; 一氧化氮; Reactive oxygen species; Lipid peroxidation; Antioxidant enzymes; Pepper; NO; |
語文 | 中文(Chinese) |
中文摘要 | 高濃度的鹽分可來自自然的過程或農業灌溉的錯誤管理,造成抑制蔬菜生長與產量。本試驗調查鹽分逆境下甜椒植株生長、氧化逆境的程度和自由基清除系統的作用,並藉由外施一氧化氮方式減輕逆境的不利影響,提供耐鹽分逆境下改善蔬菜生產之參考。以甜椒‘翠美星’第三片本葉完全展開之幼苗為試驗材料。先預處理2次300mM NaCl於土壤中。一氧化氮處理組除施用300 mg L(superscript -1) 花寶二號混合300mM NaCl之外,分別澆灌0、50、100 、150μM亞硝基鐵氫化納(sodiumnitroprusside,SNP,一氧化氮提供劑)至土壤中。結果顯示,外施一氧化氮增加甜椒幼苗於鹽分逆境下的株高、葉片數、莖寬、根長、葉片長與寬、地上部和根部之鮮乾重,減少葉片電解質滲漏、丙二醛、超氧陰離子和過氧化氫含量。以150µM一氧化氮處理比起50及100μM處理者,葉片有較高的超氧岐化酶、過氧化氫酶、抗壞血酸過氧化酶和麩胱甘肽還原酶活性。故一氧化氮可透過促進抗氧化酵素系統,減低鹽分逆境所引起的傷害,且一氧化氮可能具有生長調節劑潛力,並提升植物之耐鹽性。 |
英文摘要 | High concentrations of salt resulting from natural processes or mismanagement of irrigated agriculture inhibit plant growth and yield. This study investigated plant growth, oxidative stress levels, and the function of the free radical scavenging system of sweet pepper seedlings under salinity conditions. Nitric oxide (NO) also modified the adverse effects of this stress and increased salt resistance. Seedling at three true leaves stage of sweet pepper 'Trim Star' was pretreated with 300 mM NaCl to soil twice before NO was applied as a soil drench. Seedlings were exogenously applied with mixture solution of Hyponex No.2 of 300 mg L(superscript -1), NaCl of 300 mM, and three concentrations of sodium nitroprusside (SNP;0, 50, 100, 150 µM). The results indicated that exogenous NO increased shoot length, number of leaves, stem width, root length, leaf length and width, shoot fresh weight, root fresh weight, and shoot and root dry weight. Decreases of electrolyte leakage, contents of malonaldehyde, superoxide anion, and hydrogen peroxide in sweet pepper seedling under salt stress were also observed. In the treatment of 150 µM SNP, the activities of superoxide dismutase, catalase, ascorbate peroxidase, and glutathione reductase were high in leaves, compared to 50 and 100 µM. It was concluded that NO ameliorated the stress genera ted by NaCl through the enhanced antioxidant enzymes system, and NO might be a potential growth regulator to improve the salinity tolerance of plant. |
本系統之摘要資訊系依該期刊論文摘要之資訊為主。