Hemarthria Compressa And Lolium Multiflorum On The Of Physiological Response Aluminum Stress

Five strain lines of Hemarthria compressa and six cultivars of Lolium multiflorum were studied on growing and physiologic characteristics by treated with different concentrations of Al. The results were as followed:1. No Hemarthria compressa materials died in low concentration group. And there was also no death of Guangyi treated at different levels of high concentrations, however, other materials began to die under 1000mg/L AlCl3, the rate of death were increasing by higher concentrations of Al Based on survival rate, the tolerance of aluminum was:Guangyi> H2002-6> H002>Yaan> H019.2. Five strain lines of Hemarthria compressa were treated at different Al concentrations, growth indexes as rate of root elongation, plant height, stem thickness, length of leaf, width of leaf and biomass were measured, the results indicated that low concentration promoted growth on them besides H002 in some way, especially on Guangyi. Inhibition of growth was observed by treated with high concentrations. And compared H019 with other four materials, rate of relative root elongation, relative plant height, relative length of leaf, relative width of leaf and biomass were lower, which was the sensitive to aluminum. On contrary, Guangyi had higher indexes to other materials that were the most tolerant aluminum cultivars.3. Physiology response of Hemarthria compressa was studied under aluminum stress by choosing the best Guangyi and the worst H019. The result showed that MDA of Guangyi and H019 were obviously lower than check cultivar in low concentration group which were treated by 50 mg/L AlCl3. MDA of H019 was significant higher than check one under 250mg/L AlCl3, but it would recover to normal level with the extension of time. SOD activity of Guangyi and H019 were lower than check one when those were treated with 50 mg/L AlCl3 and 100 mg/L AlCl3. However there was no difference observed in other treatments. And CAT and POD of Guangyi and H019 showed no changes. In high concentration group, MDA of Guangyi varied from increasing to reducing through the enhancement of aluminum concentration. But MDA of H019 became higher and higher because of increasing aluminum concentration, and under the sever aluminum stress that would reduce. The tendency showed first increased than reduced with the increasing of aluminum and under serious stress all these three enzymes began to reduce. The continuous intensified of these three enzymes which can reduce the harms came from active oxygen and radical made it more tolerant than H019.4. Significant effects were found on the treatment of Lolium multiflorum seeds germination. Low concentration had promotion on it, in some extent, which has enhanced germinative force, germinative rate, germination index and vitality index. But there was no impact on fresh weight. On germinative force, significant promoted effect was observed on Jumbo, And on germination rate, that was Florida 4N. But when it was treated with high concentrations all these indexes were inhibited obviously. By determination on germiative force and germination rate, Jumbo was the most tolerant cultivar and ChangjiangNO.2 was the worst.5. There were significant impacts on aluminum treated Lolium multiflorum by measured plant height, length of leaf, width of leaf, fresh weight. It showed that promoted growth at low concentration and inhibited growing at high concentration. Low concentration had the best effect on promoting growth of Jumbo, and abode was the worst. Jumbo was inhibited by high concentration the least, and ChangjiangNO.2 was the opposite one.6. The best Jumbo and the worst Changjiang NO.2 were used for physiological response of Lolium multiflorum. Content of MDA dropped when Jumbo was treated by low aluminum concentration. No changes were observed on the of activities SOD, CAT and POD. And by treated it under high concentration of aluminum, Content of MDA was up.The of activities SOD, CAT and POD were intensified according to the aluminum concentration. However when ChangjiangNO.2 was treated at low concentration, MDA and SOD changed very rare, and CAT activity started to increase under 200mg/L AlCl3, which would intensify with the continuous aluminum concentrations. But POD activity intensified at low concentration, that arrived the peak at under 500mg/L AlCl3, and then it dropped with increasing Al concentration.