查詢結果分析
相關文獻
- Photosynthetic Characteristics of Light-sensitive, Chlorophyll-deficient Leaves from Sectorially Chimeric Stinging-nettle
- 鹽分對欖李苗木水分狀態、葉綠素螢光反應與細胞活性之影響
- Correlation between Ozone Resistance and Relative Chlorophyll Fluorescence or Relative Stomatal Conductance of Bedding Plants
- 二氧化碳濃度與溫度對樟樹苗木之形質生長參數與葉綠素螢光反應之影響
- 溫度對不同種源臺灣赤楊之光合作用的影響
- 草殺淨所引起植物之型態異常及葉綠素螢光之變化
- Application of Bioassay, High Performance Liquid Chromatography and Chlorophyll Fluorescence Decay on the Detection of Herbicide Bentazon Residue in Crops
- 二、四-地非致死劑量對玉米及胡瓜之毒性及殘留分析
- Effects of β-carotene Feeding on Chlorophyll Fluorescence, Zeaxanthin Content, and D1 Protein Turnover in Rice (Oryza sativa L.) Leaves Exposed to High Irradiance
- 超低量巴拉刈(Paraquat)在胡瓜及玉米植株之殘留及藥害診斷
頁籤選單縮合
| 題 名 | Photosynthetic Characteristics of Light-sensitive, Chlorophyll-deficient Leaves from Sectorially Chimeric Stinging-nettle=一種刺人的蕁蔴之變種葉子(含斑點,缺葉綠素,對光敏感),及其光合作用之特性 |
|---|---|
| 作 者 | Henriques, Fernando S.; | 書刊名 | Botanical Studies |
| 卷 期 | 49:3 2008.07[民97.07] |
| 頁 次 | 頁235-241 |
| 分類號 | 373.962 |
| 關鍵詞 | 鑲嵌作用; 葉綠素螢光; 葉綠素胜肽; 光合作用之二氧化碳淨吸取; 蕁蔴; Chimerism; Chlorophyll fluorescence; Chloroplast peptides; Photosynthetic net CO₂ uptake; Urtica dioica L.; |
| 語 文 | 英文(English) |
| 中文摘要 | 刺人蕁蔴(Urtica dioica L.)部位鑲嵌之突變葉子顯示降低之色素含量及下降的光合作用活用。相對於野生型而言,變種葉不但大量缺少總葉綠素及胡蘿菠素(暗示喪失了大部份之光合作用單位),而言表現出非常高之葉綠素a/b比率(暗示剩餘之光合作用單位其天線大小已減小)。光學顯微鏡及電子顯微鏡証實變種葉中葉綠體數目明顯減少;多肽成分之分析顯示在剩餘之葉綠體中光合作用系統II之天線脫輔基蛋白大為減少。在變種葉之光合作用單位之內在光化學效率(以測得之螢光為分子,以暗適應之最大螢光為分母所得之比率表示)只比控制組略低,而且其數值和葉子之淨二氧化碳吸取能力呈強度相關。本文結論:所觀察之變種葉在發育過程,逐漸喪失葉綠體,但是殘存之葉綠體保存它們大多數之光合作用能力。葉綠體數目減少之原因很可能源自葉綠素前驅體之累積,進而抑制光合作用必需蛋白質之生合成,並且做為光敏劑導致葉綠素之分解。 |
| 英文摘要 | Mutated leaves of sectorially chimeric stinging nettle (Urtica dioica L.) showed decreased pigment content and reduced photosynthetic activity. Relative to their wild type siblings, the mutated leaves were not only largely depleted in total chl and car, suggestive of a significant loss of photosynthetic units, they also exhibited much higher chl a/b ratios, indicative of a major reduction in the antenna size of the remaining photosynthetic units. Light and electron microscopy confirmed a notable decrease in chloroplast number in mutated leaves, and analysis of polypeptide composition revealed a large depletion of the apoprotein of PSII antenna in these chloroplasts. The photosynthetic units present in mutated leaves showed an intrinsic photochemical efficiency, measured as the variable to maximum fluorescence ratio of dark-adapted leaves, only slightly lower than controls, and their concentration correlated strongly with the leaves's net CO₂ uptake capacity. It is concluded that mutated leaves of stinging nettle underwent a gradual chloroplast loss during development, but the remaining organelles preserved much of their photosynthetic competence. This chloroplast loss most likely arises from an accumulation of chl precursors that repress the synthesis of photosynthetic essential proteins and act as photosensitizers for chloroplast degradation. |
本系統中英文摘要資訊取自各篇刊載內容。