摘要
以1年生风箱果幼苗为材料,设置对照(CK)、轻度干旱胁迫(W1)、中度干旱胁迫(W2)和重度干旱胁迫(W3)等4种处理,研究不同干旱胁迫对幼苗的生长表现、生物量积累、光合生理特征和抗氧化酶活性等的影响。结果表明:W1处理对幼苗的生长和生物量积累影响较小,W2处理和W3处理显著抑制了幼苗的生长和生物量的积累,特别是W3处理,苗高和地径比CK分别减少了71.4%和77.8%,根、茎、叶和总生物量比CK分别减少了33.3%、75.0%、69.2%和57.6%;光合生理参数和抗氧化酶活性均随干旱胁迫加剧呈先增大后减小的趋势,W1处理最大;W1处理对丙二醛(MDA)质量摩尔浓度和细胞膜相对透性影响较小,W2处理和W3处理影响显著增大。风箱果幼苗能够适应轻度干旱胁迫,中、重度胁迫下生长和光合能力均受到抑制,抗氧化酶系统遭到破坏。
One-year-old Physocarpus amurensis seedlings were grown in pots to study the effects of different drought stress on seedling growth performance,biomass accumulation,photosynthetic physiological characteristics and antioxidant enzyme activities with four kinds of stress treatments including control(CK),light drought stress(W1),moderate drought stress(W2)and heavy drought stress(W3).W1 had little effect on seedling growth and biomass accumulation.W2 and W3 significantly inhibited seedling growth and biomass accumulation.Especially,W3,seedling height and ground diameter decreased by 71.4%and 77.8%,respectively,compared with CK,and root,stem,leaf and total biomass decreased by 33.3%,75.0%,69.2%and 57.6%,respectively,compared with CK.Photosynthetic physiological parameters and antioxidant enzymes activities increased and then decreased with the drought stress aggravated,and reached the maximum at W1.W1 had little effect on the contents of MDA and membrane permeability,and increased significantly at W2 and W3.P.amurensis seedlings were able to adapt to light drought stress,the growth and photosynthetic ability of the seedlings were inhibited,and the antioxidant enzyme system was destroyed under moderate and heavy drought stress.
作者
殷东生
魏晓慧
Yin Dongsheng;Wei Xiaohui(Forestry Research Institute of Heilongjiang Province,Harbin 150081,P.R.China;Northeast Forestry University,Harbin 150040,P.R.China)
出处
《东北林业大学学报》
CAS
CSCD
北大核心
2019年第1期26-29,34,共5页
Journal of Northeast Forestry University
基金
黑龙江省自然科学基金项目(C201341)
关键词
风箱果
干旱胁迫
生长性状
生物量积累
光合生理
抗氧化酶活性
Physocarpus amurensis
Drought stress
Growth properties
Biomass accumulation
Photosynthetic physiology
Antioxidant enzyme activities
