The Effect Research Of Growth Regulator To Young Grapevine Growing And Resistance Physiological Metabolism Under Water Stress

The experiment studied different plant growth regulator to shoot growth relation of leaves and water, photosynthesis , transpire rete and resist oxidize ability of potted or field plant grapevine (Vitis Vinifera) small tree, during water stress period and detached leaves to natural drying in air was effect. The result showed that:1. The shoot growth of potted grapevine become weak under water stress condition, it's growth is stopped when the water stress become serious. The shoot growth of young potted grapevine is obviously promoted after the surface of leaves are dealt with betaine, R- II and R-III. The effect last over 15 days after spraying of three times, what's more, the increasing effect R-I and R- II is larger than betaine ; the effect of FA to grapevine young tree is not stable, and the time is short. If dealt with R-I, the effect is not obvious; under adequate water stress condition, the young field grapevine surface of leaves are dealt with betaine and FA,the effect is not obvious. R-I can restrain the growth of grapevine shoot growth; R-II and R-III can also restrains the growth of grapevine shoot growth; the restrain effect of R- II and R-III them into promotion when swc dropped to 11.7%, namely closing water stress, but they all did not attain obvious level.2. The increasing of grapevine leaves water content is the most, this difference is obvious than the contrast, if using R-II, when potted grapevine young tree surface of leaves are dealt with difference growth regulator of stopped pour water for 5 days later; the water content of grapevine leaves increase obviously than contrast, if using R-ffl and betaine; the deposition of R-I and FA can lead to the increasing of water content, but it did not attain obvious difference. The water content of leaves are higher than contrast if sprayed R- II and R-ffl; the water content of leave are higher than contrast if sprayed betaine and FA, but it did not attain obvious level; the water content of leaves are the same as the contrast if dealt with R-I ,under adequate water supply condition, the young field grapevine surface of leaves are dealt with difference growth regulator.3. Under water stress condition potted grapevine young tree, the dehydration speed is slower than the contrast if detached leaves which are satiated by water are deposed of different growth regulator before 30 minutes, the difference is obvious than contrast if dealt with R- II, R-III and betaine; the difference is not obvious than contrast if dealt with R-I and FA. The dehydration speed is the same as the contrast if the leave are dealt with different regulator in 30 minutes. The dehydration speed is the same as the contrast if the detachedleaves are dealt with different regulator before 45 minutes under inadequate water supply condition.4. Under water stress condition, following the prolong of water stress's time, SOD activity of grapevine young tree leaves continuously drop, yet the producing rate of O2- and MDA content are increasing. After be imposed difference kinds plant growth regulator, no matter potted plants or detached leaves, betaine, R-II and R-III all obviously defend leaves SOD activity and slowdown o2- produce rate and MDA content increasing action, other than R-I and FA effect was not obvious.5. The leaf photosynthesis and transpire of potted grapevine young tree which is deposed of different growth regulator are higher than the contrast, under water stress condition, but these can not attain obvious difference.