干旱胁迫对油橄榄幼苗的影响

Effects of Drought Stress on the Growth of Olea europea Younglings

以油橄榄幼苗为材料,在旱棚盆栽条件下进行苗期干旱胁迫试验。对株高、脯氨酸含量、可溶性蛋白、可溶性糖含量、丙二醛(MDA)含量、超氧化物歧化酶(SOD)活性、过氧化物酶(POD)活性、过氧化氢酶(CAT)活性进行了测定。结果显示:进行模拟干旱胁迫后,株高、脯氨酸、可溶性蛋白及SOD含量无明显变化;可溶性糖、CAT、MDA、POD含量逐渐升高。研究表明,在不同程度的干旱胁迫条件下,油橄榄幼苗的生长受到一定程度的抑制,但能够通过调节自身的保护酶系统活性和渗透调节物质含量来减轻干旱伤害,维持植物体的正常生理代谢功能,从而表现出一定的抗旱耐旱潜力。

In this paper,taking the young seedlings of Olea europea as experimental materials potted in the greenhouse,the tests of the drought stress were made at the seedling stage,the determination was made of plant height,proline content,Malondialdehyde（ MDA） content,the total soluble protein,soluble sugar content,superoxide dismutase（ SOD） activity,peroxidase（ POD） activity and catalase（ CAT） activity. The result showed that after a simulated drought stress,the tree height and chlorophyll content（ CC）,proline content,total soluble protein and SOD contents had no remarkable change,and the contents of soluble sugar,CAT,MDA and POD rose gradually. It could be concluded that the growth of Olea europea seedlings were negatively influenced by different degree of drought stress,but the protective enzyme system and osmatic adjustment substance could adjust themselves to avoid the drought damage,thus young seedlings had some tolerant ability to drought conditions.