| Experimental in 2013 to 2015 in Heilongjiang Bayi Agricultural University to drought-resistant soybean variety "Hei Nong 64" drought-sensitive species "Suinong 14" for the test material, by soaking seeds and seedling Uniconazole spraying uniconazole two-part test to study the effects of Uniconazole on soybean plants under drought stress on morphological and physiological aspects of metabolism, reveal the effects and the mechanisms regulating system regulation of soybean seedling drought for chemical control technology applications in production Theoretical basis. The main findings are as follows:Suinong Heinong 14 and 64 in a non-drought conditions 1. The total root length Uniconazole soaking treatment, the average root diameter, total root surface area, total root volume, root number is substantially higher than the drought. Under drought stress, compared with the control, Uniconazole soaking treatment had increased the total root length of two varieties, the average root diameter, total root surface area, root volume and total root number.Under non-drought conditions, drought stress after 48 h, compared with control, Uniconazole soaking treatment had increased the total root length of two varieties, the average root diameter, total root surface area, root volume and total root number.2. Suinong Uniconazole soaking Heinong 14 and 64 relative conductivity of non-root under drought conditions were less than root relative conductivity and MDA content under drought conditions. Under drought stress, drought stress after 48 and 60 h, compared with control,Uniconazole soaking the roots decreased relative conductivity and MDA content in rice and improve the content of soluble sugar. Under non-drought stress, compared with the control,Uniconazole soaking reduces Suinong Heinong 14 and 64 relative conductivity roots; 12 h unless drought stress, Uniconazole soaking reduces Suinong 14 and 64 Heinong root MDA content; the majority within the measurement time, Uniconazole soaking improves Suinong 14 and 64 Heinong root soluble sugar content.3. Under drought stress, Uniconazole soaking treatment increased Suinong 14 and 64 Heinong root soluble protein content; 12 and 72 h after drought stress, Uniconazole soaking adds two varieties of root SOD activity; in most measurement time inside, uniconazole enhanced POD activity. Under non-drought stress, drought stress except after 72 h, soakingUniconazole adds two varieties of root SOD activity; Uniconazole soaking the roots POD activity were increased two varieties;4. Spraying uniconazole under drought and non-drought conditions, stem dry weight Uniconazole significantly larger than the control, drought stress reduced the amount of stem weight 2 ~ 4 d regulator treatment is minimized. Rehydration 2 ~ 6 d, stem dry weight of each treatment showed an upward trend. Suinong Uniconazole 14 and 64 black farmers plant height were significantly lower than the control. Uniconazole stem diameter were higher than the control, a large increase in stem diameter 6 and 8 d after drought stress Uniconazole ratio,better effect.5. Spraying Uniconazole increased by 14 and 64 Heinong chlorophyll content,photosynthetic rate, transpiration rate and stomatal conductance Suinong under drought and non-drought conditions. Four days after rehydration, after spraying Uniconazol chlorophyll content, photosynthetic rate, stomatal conductance and transpiration rate were significantly higher than the control.6. Spraying Leaves ene efficiency under drought azole-treated and non-drought conditions relative conductivity, MDA content was significantly lower than the control, soluble sugar content was significantly higher than the control. After rehydration, allyl effect Suinong azole treatment Heinong 14 and 64 relative conductivity, MDA content was significantly lower than the control, soluble sugar content is still significantly higher than the control. Foliar SOD activity blade ene efficiency under drought azole-treated and non-drought conditions, POD activity and CAT activity was significantly higher than the control. After rehydration, leaf protective enzyme activities Uniconazole still higher than the control.7. Spraying Uniconazol significantly reduced soybean plant height at maturity drought and non-drought conditions, at the same time, a significant increase in soybean plant stem diameter.Per plant, pods per plant and yield under drought and non-drought conditions Uniconazole were higher than the control of Suinong 14, the difference between treatment and control reached significant levels, Suinong 14 better control effect. |
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