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頁籤選單縮合
題 名 | Photosynthetic Adaptation of Meconopsis Integrifolia Franch. and M. Horridula var. Racemosa Prain=全緣葉綠絨蒿和總狀綠絨蒿的光合適應性差異 |
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作 者 | 張石寶; 胡虹; | 書刊名 | Botanical Studies |
卷 期 | 49:3 2008.07[民97.07] |
頁 次 | 頁225-233 |
分類號 | 434.92 |
關鍵詞 | 綠絨蒿; 光合作用; 葉綠素螢光; 葉片性狀; 生理適應性; Chlorophyll fluorescence; Leaf traits; Meconopsis; Photosynthesis; Physiological adaptation; |
語 文 | 英文(English) |
中文摘要 | 全緣葉綠絨蒿(Meconopsis integrifolia)和總狀綠絨蒿(M. horridula)原產於喜馬拉雅地區,是著名的觀賞和藥用植物。但是由於其難於忍受炎熱的夏季,在低海拔地方栽培綠絨蒿非常困難。為了探索適宜的栽培策略和預測引種栽培的植物表現,我們在海拔3,260米的苗圃內比較了全緣葉綠絨蒿和總狀綠絨蒿的光合作用能力及其光合作用對光照與溫度的反應。全緣葉綠絨蒿光合作用對高溫比總狀綠絨蒿敏感,而總狀綠絨蒿得到最大光合速率需要更高的光強。與全緣葉綠絨蒿相比,總狀綠絨蒿也表現出更高的飽和光合速率、最大羧化速率、飽和電子傳遞速率、氣孔導度、比葉重和單位面積葉氮含量,但它們的葉肉導度和單位重量的葉氮含量沒有顯著差異。兩種綠絨蒿的光合能力差異主要與其生化效率和葉片厚度相關,而與葉綠素含量和葉肉導度無關。研究結果表明,由於總狀綠絨蒿具有更寬泛的生理適應能力,它在低海拔地方的引種栽培比全緣葉綠絨蒿更易成功。 |
英文摘要 | Both Meconopsis integrifolia Franch. and M. horridula var. racemosa Maxim. are native to the Himalyas and prized as ornamentals and medicinal plants. Cultivating Meconopsis is difficult at lower altitudes owing to its intolerance to hot summers. To develop a cultivation strategy and predict plant performance for introduction, we compared the photosynthetic capacity of M. integrifolia and M. horridula as well as their photosynthetic responses to light and temperature in the nursery at an altitude of 3,260 m. Meconopsis integrifolia was more sensitive to high temperature than M. horridula reached a peak photosynthetic rate at a higher light level than M. integrifolia. Compared with M. integrifolia, M. horridula showed a higher light saturated photosynthetic rate, maximum RuBP saturated rate of carboxylation, light saturated rate of electron transport, stomatal conductance, leaf dry mass, and N content per unit area. The mesophyll conductance and leaf N content per unit mass of the two species were not significantly different. The differences in photosynthetic capacity between two Meconopsis species were correlated with their biochemical efficiency and leaf thickness, but not chlorophyll content or mesophyll conductance. The results suggest that, at lower altitudes, introducting and cultivating M. horridula could be easier owing to its wider physiological adaptation. |
本系統中英文摘要資訊取自各篇刊載內容。