發(fā)布時間：2018-10-05 13:07

【摘要】：本試驗研究了盆栽嫁接葡萄苗和自根葡萄苗在干旱脅迫下光合特性、葉綠素含量及葉綠素熒光特征的變化,探討在干旱脅迫下砧木與葡萄接穗光合特性、葉綠素含量及葉綠素熒光特征的關系。試驗主要結果如下:1.隨干旱脅迫程度的加深,不同砧木嫁接組合葡萄的凈光合速率、氣孔導度和蒸騰速率均降低,表現(xiàn)為赤霞珠/貝達赤霞珠/5BB赤霞珠/SO_4赤霞珠自根苗、梅鹿輒/貝達梅鹿輒/5BB梅鹿輒/SO_4梅鹿輒自根苗、西拉/貝達西拉/5BB西拉/SO_4西拉自根苗。而細胞間隙CO2濃度升高,表現(xiàn)為赤霞珠/貝達赤霞珠/5BB赤霞珠/SO_4赤霞珠自根苗、梅鹿輒/貝達梅鹿輒/5BB梅鹿輒/SO_4梅鹿輒自根苗、西拉/貝達西拉/5BB西拉/SO_4西拉自根苗。2.干旱脅迫下,所有供試葡萄光合速率日變化均呈現(xiàn)雙峰曲線,在14:00凈光合速率出現(xiàn)明顯的"午休"現(xiàn)象,而砧木能明顯提高接穗此時的凈光合速率,從而緩和葡萄的光合"午休"現(xiàn)象。3.隨干旱脅迫程度的加深,不同砧木嫁接組合葡萄的總葉綠素含量和類胡蘿卜素含量均降低,表現(xiàn)為赤霞珠/貝達赤霞珠/5BB赤霞珠/SO_4赤霞珠自根苗、梅鹿輒/貝達梅鹿輒/5BB梅鹿輒/SO_4梅鹿輒自根苗、西拉/貝達西拉/5BB西拉/SO_4西拉自根苗。4.隨干旱脅迫程度的加深,不同砧木嫁接組合葡萄的Fv/Fm、qP、Yield值均降低,表現(xiàn)為赤霞珠/貝達赤霞珠/5BB赤霞珠/SO_4赤霞珠自根苗、梅鹿輒/貝達梅鹿輒/5BB梅鹿輒/SO_4梅鹿輒自根苗、西拉/貝達西拉/5BB西拉/SO_4西拉自根苗。
[Abstract]:The effects of drought stress on photosynthetic characteristics, chlorophyll content and chlorophyll fluorescence of grafted grape seedlings and self-root grape seedlings were studied in this experiment. The photosynthetic characteristics of rootstocks and grape scions were studied under drought stress. Relationship between chlorophyll content and chlorophyll fluorescence characteristics. The main results of the experiment are as follows: 1. With the deepening of drought stress, the net photosynthetic rate, stomatal conductance and transpiration rate of grape grafted with different rootstocks decreased, which was shown as Cabernet Sauvignon / Beida Cabernet Sauvignon / 5BB Cabernet Sauvignon / so _ 4 Cabernet Sauvignon Seedling. Merlot / Beida Merlot / 5BB Merlot / However, the intercellular CO2 concentration increased, showing that Cabernet Sauvignon / Beida Cabernet Sauvignon / 5BB Cabernet Sauvignon / so _ 4 Cabernet Sauvignon self-rooted seedlings, Merlot / Beida Merlot / 5BB Merlot / so _ 4 Merlot self-rooting seedlings, Silas / Bedacilla / 5BB Silas / so _ 4-Sierra self-rooted seedlings. Under drought stress, the diurnal variation of photosynthesis rate of all the tested grapes showed a bimodal curve. At 14:00, the net photosynthetic rate of grape appeared obvious "midday depression" phenomenon, while the rootstock could obviously increase the net photosynthetic rate of the scion at the same time. So as to ease the grape photosynthetic "midday depression" phenomenon. 3. With the deepening of drought stress, the total chlorophyll content and carotenoid content of grape grafted with different rootstocks decreased, which was shown as Cabernet Sauvignon / Beida Cabernet Sauvignon / 5BB Cabernet Sauvignon / so _ 4 Cabernet Sauvignon Seedling. Merlot / Beida Merlot / 5BB Merlot / With the deepening of drought stress, the Fv/Fm,qP,Yield value of grape grafted with different rootstocks decreased, which showed that Cabernet Sauvignon / Beida Cabernet Sauvignon / 5BB Cabernet Sauvignon / so _ 4 Cabernet Sauvignon self-rooted seedlings, Merlot / Beida Merlot / 5BB Merlot / so _ 4 Merlot self-rooted seedlings, Silla / Bedasila / 5BB Silla / so _ 4 Sid _ 4.
【學位授予單位】：內蒙古農業(yè)大學
【學位級別】：碩士
【學位授予年份】：2017
【分類號】：S663.1

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