摘要
以美洲黑杨与大青杨6个杂种无性系1年生扦插苗为材料,对其5℃连续5d低温胁迫过程中若干生理指标的变化规律进行研究。结果表明,随着胁迫时间的延长,6个无性系叶绿素含量和最大光能转换效率逐渐降低,丙二醛含量保持逐渐上升趋势,而可溶性糖与可溶性蛋白含量均呈现出先上升后下降的趋势。此外,各指标6个无性系间差异明显:无性系DU146和DU147叶绿素含量、最大光能转换效率、可溶性糖以及可溶性蛋白含量在胁迫过程中均相对较高,而丙二醛含量及其增加倍数相对较低,说明其具有较强的光合作用及低温耐受能力;其次是无性系DU136和DU165;而无性系DU135和DU150光合作用及低温耐受能力较弱。
Cuttings of six hybrid clones of P.deltoides×P.ussuriensis were exposed to consecutive low temperatures（5 ℃,0 to 5 days） to study the variation of several physiological indices.The results indicated that under low temperature stress,chlorophyll content and Fv/Fm values in the six hybrid clones decreased gradually;MDA content kept a gradually increasing trend;content of soluble sugar and soluble protein increased first and then declined.In addition,there were significant differences among the six clones in those physiological indices under low temperature stress,and chlorophyll content,Fv/Fm values,soluble sugar and soluble protein content in clones DU146 and DU147 were the highest,whereas MDA content and the increased multiples were the lowest,reflecting that they possessed more photosynthetic and low-temperature-tolerant abilities;clones DU136 and DU165 were in the next place,whereas clones DU135 and DU150 were the weakest.
出处
《北京林业大学学报》
CAS
CSCD
北大核心
2012年第1期58-63,共6页
Journal of Beijing Forestry University
基金
林业公益性行业科研专项(201004009)
