自然干旱胁迫及复水处理对红秆寒竹生理特性的影响  

Physiological characteristics of Chimonobambusa marmorea f. variegata with natural drought stress and rewetting

作　　者：应叶青[1] 郭璟[1] 魏建芬[1] 晏金凤[1] 路英[1] 方伟[1] 

机构地区：[1]浙江农林大学浙江省现代森林培育技术重点实验室,浙江临安311300

出　　处：《浙江林学院学报》2010年第4期513-517,共5页Journal of Zhejiang Forestry College

基　　金：浙江省重大科技专项(2006C12008)

摘　　要：干旱胁迫是影响植物生长发育及园林应用的重要因子。为掌握红秆寒竹Chimonobambusamarmorea f.varie gata的抗旱能力及其抗旱机制,于温室内测定了其自然干旱及复水后的叶绿素(Chl)质量分数、超氧化物歧化酶(SOD)活性、过氧化氢酶(CAT)活性、丙二醛(MDA)质量摩尔浓度。结果表明:随着干旱胁迫时间的延长,叶绿素质量分数从4.470mg·g-1降到1.807mg·g-1,干旱处理30d后一直比较稳定。随着干旱胁迫加强,CAT和SOD活性、丙二醛质量摩尔浓度均呈增加的趋势,在处理30d后。CAT和SOD活性均维持在较高且稳定的水平,丙二醛质量摩尔浓度在40d时达到最高水平。复水5d后,叶绿素质量分数和CAT活性基本不变,SOD活性和丙二醛质量摩尔浓度则有所下降。红秆寒竹叶片细胞膜自我修复能力较强,具有较强的抗干旱能力。To understand drought resistance capacity of Chimonobambusa marmorea f. variegata and how it occurs, the dynamics of C. marmorea f. variegata and its levels of superoxide dismutase （SOD）, catalase （CAT）, malondialdehyde （MDA）, and chlorophyll were determined with leaves experiencing conditions of natural drought and rewetting. Results indicated that as drought stress continued （0 30 d）, chlorophyll content significantly （P0.01） decreased from 4.470 to 1.676 mg·g-1 and after 30 d treatment remained stable. CAT and SOD increased significantly （P0.01） as drought stress increased （0 30 d）, and after 30 d treatment maintained high levels. MDA levels were highest when 40 d treatment. After rewetting for 5 d, chlorophyll and CAT remained unchanged, whereas SOD and MDA decreased significantly （P0.01） when 5 d rewetting. This indicated that a self-repair mechanism in the leaf cell membrane of bamboo was strong, and therefore, Chimonobambusa marmorea f. variegata was a drought-tolerant plant.

关 键 词：森林生物学 红秆寒竹 干旱胁迫 保护酶活性 叶绿素 

分 类 号：S718.43[农业科学—林学] S795