Studies on Physiological and Biochemical Characteristics Related to Saline Alkali Stress in Grafted Seedlings of Vitis Amurensis
|School||Jilin Agricultural University|
|Keywords||Mountain grapes grafted seedlings Alkali Stress Photosynthetic rate Pro Betaine|
Mountain grapes than the salinity perennial vine, due to severe soil salinization in western Jilin Province, limiting its suitable planting range. The mountain grape salinity research and salinity varieties screening, in order to propose improved range of saline-alkali soil, which will mountain grapes of great significance. The study Shuangyou double red and left Yamaichi annual grafted seedlings as test materials, pot method salinity stress on plant growth and development and physiological and biochemical characteristics. The main results are as follows: a mountain grapes in low salinity stress conditions normal growth, high stress plants dwarf, stunted growth, plant height, of new shoots roughness and leaf area and root fresh and dry weight with salinity stress intensity strengthening while reducing harm heavier and with the duration of stress time. Three varieties in soil pH 8.30 potting none of germination and death, two red and left Yamaichi also all died 150 days after treatment in the soil pH8.02. Therefore, the three varieties under salinity stress conditions common lethal soil pH of 8.30. 2 mountain grape cultivation area selection: due to the mountain grapes pH8.30 soil were dead, so the soil pH should not be higher than 8.30 saline areas Growing grapes of the mountain. The regional soil should make improvements in soil pH less than 8.30 and greater than 7.51 before cultivation, the direct cultivation areas in the soil pH is less than 7.51. 3 salinity stress conditions, a comprehensive evaluation and analysis of a variety of physiological and biochemical indices of the three varieties, the results showed that the salinity sexual order Shuangyou double red left mountain. The 4 mountain grapes physiological and biochemical characteristics: salinity stress conditions, Shuangyou, double red and left the mountain leaves Ch1 (a, b, ab) content and net photosynthetic rate decreased stress strengthening and extension of stress time double red and left the mountain net photosynthetic rate decline by a big margin. Chla / b is about 2.5. The blade conductivity with increasing trend in the reproductive period into larger membrane permeability, which increase in the permeability of the double red and left the mountain significantly stronger than Shuangyou the. Blade Pro and betaine content tended to increase with the stress intensity and duration of stress time. MDA content in the Shuangyou leaves throughout the growing period tended to increase, while the double red and left the mountain a rise declined, indicating that the double red and left the mountain salinity is somewhat less. POD, SOD activity in low salinity stress conditions, Shuangyou unknown, double red and left the mountain a change in high salinity stress conditions, Shuangyou increase the maximum increase of the double red and left the mountain a small Double Excellence's the salinity strong, double red and left the mountain salinity poor. Root activity, Shuangyou, elevated double red root activity decreased to low salinity stress increased root activity, high stress inhibited root activity. Left Yamaichi salinity stress always reduces its root activity.