铝处理马尾松对高温、低温、干旱和SO_2的抗性研究

Study on Resistance of Aluminum-stressed Masson Pines to High/Low Temperature, Ari-dity and Sulfur Dioxide.

马尾松在不同浓度铝溶液(0、30、60、120、240、480ppm)中生长两个月后,转移至高温、低温、干旱或SO_2熏气罩中,结果发现,经过铝培养松苗的膜透性显著高于未经过铝培养松苗的膜透性,且铝浓度越大,膜透性越大,表明铝处理马尾松对高温、低温、干旱和SO_2的抵抗性降低.300ppb的SO_2熏气30h后,未经铝培养的松苗没有明显受害症状出现,而经过铝培养的松苗却表现出针叶发黄、叶缘和叶尖出现明显可见伤害斑点等SO_2受害症状,高温、低温和干旱处理的主要症状表现为针叶发黄、萎蔫。

Having grown in the aluminum solution of different concentrations (0,15,30,60,120,240ppm) for two months, the saplings of masson pines were, migrated respectively to the places where the temperature was high or low, or whert was dry or in a chamber filled with a certain concentration of SO2. It was found that the membrane per-meability of the Al-stressed saplings was, significantly higher than ordinary ones, and the resistance of Al-stressed masson pines to high/low temperatures, aridity and SO2 fell into a decline. After exposing in 300ppb SO2, the Al-stressed masson pines showed visible injury symptoms, such as leaf yellowing, necroses on leaf tips and margins. However, on the ordinary masson pines, it appeared not. Under the conditions of high/low temperatures or aridity, the leaves of Al-stressed masson pines appeared to be withering.