發(fā)布時(shí)間：2018-10-12 08:11

【摘要】：試驗(yàn)以赤霞珠和梅鹿輒為材料,采用控水方式進(jìn)行干旱脅迫處理,通過研究兩種葡萄在干旱脅迫過程中超微弱發(fā)光、生長活力、光合作用、活性氧系統(tǒng)以及能量水平的變化,來探討在干旱脅迫過程中,葡萄葉片超微弱發(fā)光的變化以及與光合作用、活性氧以及能量水平等的關(guān)系,研究主要結(jié)果如下:1.在干旱脅迫過程中,兩種葡萄的土壤含水量、葉片相對含水量、自由水含量、自由水/束縛水比值、根系活力均逐漸下降,束縛水含量逐漸上升,即葡萄的生長活力降低。UWL強(qiáng)度均呈下降趨勢,說明在干旱脅迫下,UWL強(qiáng)度隨脅迫程度的加重而下降,UWL可以反映葡萄受脅迫的程度。2.在干旱脅迫過程中,兩種葡萄葉片的活性氧均呈現(xiàn)上升趨勢,UWL強(qiáng)度均呈下降趨勢,說明活性氧的累積并沒有引起UWL強(qiáng)度的增加,活性氧并不是UWL的直接來源。3.在干旱脅迫過程中,兩種葡萄葉片的光合參數(shù)Pn值、Tr值、Gs值逐漸下降,Ci值逐漸上升;熒光參數(shù)Fv/Fm、Yield、qP逐漸下降、qN逐漸上升;葉綠素a和葉綠素b含量均呈下降趨勢,UWL強(qiáng)度呈下降趨勢。說明在干早脅迫過程中,UWL強(qiáng)度隨光合作用的減弱而降低,光合作用與UWL的產(chǎn)生有關(guān)。4.在干旱脅迫過程中,兩種葡萄葉片的ATP含量、能荷值呈下降趨勢,ADP、AMP含量呈上升趨勢,UWL強(qiáng)度呈下降趨勢。說明在干旱脅迫過程中,UWL強(qiáng)度隨能量水平的減弱而降低,能量是UWL的主要來源之一。
[Abstract]:Using Cabernet Sauvignon and Merlot as materials, the changes of ultraweak luminescence, growth vigor, photosynthesis, active oxygen system and energy level of two grape varieties during drought stress were studied. To study the changes of ultraweak luminescence in grape leaves during drought stress and its relationship with photosynthesis, reactive oxygen species and energy levels. The main results are as follows: 1. During drought stress, the soil water content, leaf relative water content, free water / bound water ratio, root activity and bound water content of the two grape varieties decreased gradually, and the bound water content increased gradually. That is to say, the growth activity of grape decreased and the UWL intensity decreased, indicating that the UWL intensity decreased with the increase of stress degree under drought stress, and UWL could reflect the degree of grape stress. 2. In the course of drought stress, the active oxygen species of both grape leaves showed an upward trend, and the intensity of UWL decreased, indicating that the accumulation of active oxygen species did not cause the increase of UWL intensity, and the active oxygen species were not the direct source of UWL. 3. During drought stress, the photosynthetic parameters (Pn, Tr, Gs, Ci) of the two grape leaves gradually decreased, while the fluorescence parameter Fv/Fm,Yield,qP decreased and qN gradually increased. The content of chlorophyll a and chlorophyll b decreased and the intensity of UWL decreased. The results showed that the intensity of UWL decreased with the decrease of photosynthesis during dry morning stress, and photosynthesis was related to the production of UWL. During drought stress, the ATP content, energy charge value, ADP,AMP content and UWL intensity of the two grape leaves showed a decreasing trend, an increasing trend, and a decreasing trend of UWL intensity. The results showed that the intensity of UWL decreased with the decrease of energy level during drought stress, and energy was one of the main sources of UWL.
【學(xué)位授予單位】：內(nèi)蒙古農(nóng)業(yè)大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2017
【分類號】：S663.1

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