盐分胁迫对沿海沙地绿竹生理生化的效应

Effects of salt stress on physiology and biochemistry in the leaves of Dendrocalamus oldhami on the coast

对在不同程度盐分胁迫下的绿竹进行研究.结果表明:绿竹叶片的相对含水量(RWC)、水分饱和亏缺(WSD)、叶绿素含量随着盐分胁迫的加重而降低;而游离脯氨酸、质膜透性、丙二醛(MDA)含量则随着盐分胁迫的加重而提高.表明在逆境条件下,绿竹的质膜透性会随着盐分胁迫的加重而受到严重破坏,绿竹所能忍受的盐分质量分数为0.4%,>0.4%的绿竹生长会受到抑制.

Salt stress had significant effect on physiology and biochemistry of Dendrocalamus oldhami. With the increasing degree of salt stress, the relative water content, water saturation deficiency and chlorophyll content decreased, while dissociated proline content, plasmamembrane permeability and malondildehyde content increased. This indicated that the plasmamembrane permeability of D.oldhami was damaged under the stress condition. Only at the stress degree lower than 0.4% of water salt could D.oldhami grow. Under higher degree of water salt stress, D.oldhami′s growth was significantly inhibited.