Study on drought resistance on grafted seedlings from Camellia Xianglin No.11 clone
Аннотация
Use Camellia oleifera as the control, through artificial control of watering to make the nursery soil naturally dry, the drought resistance functions of one-year-old Xianglin No.11 clone grafted seedlings with C. vietnamensis, C.semiserrata, C.osmantha as the root stocks respectively, were investigated, the seven drought resistance indexes of the grafted seedling leaves under the condition of continuous drought stress, including leaf wilting coefficient, leaf relative water content, SOD, POD, MDA, free proline concentration and soluble protein content were quantitatively measured. The results show that wilting coefficient of C.osmantha grafted seedling was 1.34, significantly lower than the coefficients of C.oleifera, C.vietnamensis and C.Semiserrata grafted seedling(1.63,1.58 and 1.69 respectively), C.osmantha grafted seedling showed stronger drought resistance; By principal components analysis and subordinate function value comprehensive assessment, the drought-resistance indexes of Xianglin No.11 clone grafted seedlings with four species as the root stocks ranked from large to small as follows: C. osmantha Camellia oleifera C. vietnamensis C. semiserrata, therefore, C. osmantha as root stock can significantly improve the drought resistance of Camellia Xiang Lin 11 clone grated seedling.