摘要
对于高温胁迫条件下湿地匍灯藓 (Plagiomniumacutum)和大羽藓 (Thuidiumcymbifolium)体内游离脯氨酸积累及其与处理时间和处理温度的关系进行了初步的研究 .结果显示 ,高温胁迫与水分和渗透胁迫一样能够诱导植物体内游离脯氨酸的积累 .在一定的高温胁迫强度范围内 ,游离脯氨酸含量随处理温度的升高和处理时间的延长而增加 ;两种藓类植物中游离脯氨酸含量变化与处理温度的关系是一“S”形曲线 ,当温度从 35℃升高到 5 0℃时 ,游离脯氨酸含量增加了近 3倍 .
A study on the accumulation of free proline in two species of mosses, Plagiomnium acutum (Lindb.) T. Kop. and Thuidium cymbifolium (Doz. et Molk.) Doz. et Molk. under high temperature stress was carried out in Apr. 2000. The results showed that the high temperature stress as well as water stress could cause the proline accumulation in mosses under high temperature stress. The free proline contents in the samples increased with the rise of temperature and the prolonging of time within a certain range of temperature stress. The relationship between the average value of free proline content and the temperature is an S-formed curve. When the temperature rose from 35℃ to 50℃, the free proline contents increased by about 3 times.
