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題名 | 大豆品種間光合成率、葉片導度及細胞間隙CO[feaf]濃度對缺水反應之差異性與耐旱性之關係= |
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作者 | 廖松淵; 陳清義; |
期刊 | 中華農學會報 |
出版日期 | 19910900 |
卷期 | 155 1991.09[民80.09] |
頁次 | 頁16-29 |
分類號 | 434.215 |
語文 | chi |
關鍵詞 | 大豆; 光合成率; 品種; 耐旱性; 缺水; 細胞; 間隙; 葉片導度; 濃度; |
中文摘要 | 為瞭解長期乾旱處理對大豆光合成率、葉片導度等生理機能影響之差,及瞭解氣孔因子與非氣孔因子在此項缺水影響中所扮演角色。故以RVF自動供水裝置,進行不同程度缺水處理,並測定各大豆品種之淨光合成率、蒸散率、葉片導度及及細胞間隙C□濃度之變化,並探討與耐旱性之關係。所得結果摘述如下: 1. 供試品種包括Dah liarn,Wakashima,Native 13,AGS62,Sanlius及66-F-4-2等6品種。 2. 供試大豆不缺水株之光飽和點介於42~52Klux間,缺水程度增加,光飽和點均明顯下降。 3. 供試品種之淨光合成率及葉片導度,均隨葉片水分潛勢下降而減少,其相關係數r值分別為0.943***及0.942***,而淨光點成率及葉片導度間亦呈密切正相關(r=0.981***)但以葉片導度受缺水之影響較明顯。 4. 細胞間隙C□濃度(Ci)隨光度增強及缺水程度增加而下降。但生度增強導皮Ci下降,以葉肉阻抗(□)之影響程度較明顯,而缺水導致Ci下降,則以氣孔阻抗(□)之影響程度較明顯。且Ci對缺水之反應,品種間各具特色。 5. 光合成率及葉片導度對缺水之反應,品種間具明顯差異性,此差異性與品種之耐旱性有關,故缺水條件下,此二項生理機能之反應差,亦可當做耐旱性選擇之指標。 |
英文摘要 | This study was specifically designed to allow us to subject a large number of intact soybean plants to long-term drought stress similar to that occurs in the filed. Water was supplied by PVF strips, tested soybean variaties were grown under non-stress, moderate stress and severe stress, respectively. Photosynthetic rate, transpiration, leaf conductance and intercellular C□ concentration of six soybean varieties, inducing Dah liarn, Wakashima, Ntive 13, AGS62, Sanluis and 66-F-4-2 were measured by infar-red C□.□O analyzer in order to study the responses of physiological characteristics to drought stress. The results are summarized as follows. 1. Light saturation point of non-stress soybean was 42~52 klux, and decreased with increasing drought stress. 2. Photosynthetic rate (PN) and leaf conductance (□) each variety decreased with leaf water potential (LWP). Correlation coefficients between PN & LWP, □ & LWP, PN & □, were 0.943***, 0.942***and 0.981***, respectively. Effect of drought stress on □ was greater. 3. Intercellular C□ concentration (Ci) declined with increasing light intensity and increasing drought stress. Mesophyll resistance (□) significantly affected Ci under increasing light intensity, while stomatal resistance (□) significantly affected Ci under drought stress. Responses of Ci to drought stress differed with varieties. 4. Responses of □ and PN to drought stress differed with varieties. Those physiological response could be used as indicators for selecting drought resistance. |
本系統之摘要資訊系依該期刊論文摘要之資訊為主。