中文摘要：

比较了内生葡萄孢菌（C1）和球毛壳菌（C4）菌株诱导下的菊花苗和对照菊花苗,经30%PEG6000胁迫不同天数后,叶片超氧化物歧化酶（SOD）、过氧化物酶（POD）、苯丙氨酸解氨酶（PAL）活性,叶片丙二醛（MDA）、可溶性蛋白含量,根系活力,以及胁迫15d后菊花的总生物量。结果表明：PEG胁迫15d后,C1、C4处理和对照的生物量分别为4.1、4.4和3.3g,差异达到显著水平。对照根系活力、PAL活性在胁迫前期迅速变化,接菌处理在胁迫前期均基本稳定,延缓了胁迫反应,但随着胁迫时间的延长,各处理差异不显著;MDA含量接菌处理3d后达到峰值,随后稳定而对照则继续增加,6d时达峰值,随后逐渐降低,胁迫后期接菌处理和对照无显著差异;各处理POD活性、可溶性蛋白含量都随着胁迫时间的延长先增加后降低,但各处理之间差异不显著。短期干旱条件下,内生真菌有利于菊花耐旱性的提高。

英文摘要：

The water stress was simulated to study the effect of the endophytic fungi Botrytis sp.（C1）or Chaetomium globosum（C4）on Chrysanthemum morifolium in the adverse circumstance.C.morifolium plantlets which were inoculated with C1,C4 and cultured 60 days in the pots were stressed by 30% PEG6000 solution.SOD activity,POD activity,PAL activity,root activity,MDA content and soluble protein content were determined at 0,3,6,9,12,15 days after treatments,and the biomass of C.morifolium were also determined at 15 days after treatment.The results showed that the biomass of C1,C4 group and the control reached 4.1,4.4 and 3.3 g respectively,and all treatments got significant deviation（P 0.05）.With PEG treatment,the root activity and PAL activity of the control were more sensitive at the first period of PEG stress,while fungi treatment groups were stabled,and stress reactions were delayed by fungi treatment.MDA content of the two fungi treatments reached the peak values with PEG stress for 3 days,while the control continues increased and got the peak at 6 days with PEG treatment.When at the later period of the stress,root activity,PAL activity,and MDA content of all treatments had no significant deviation.POD activity and soluble protein content of all treatments were increased firstly and decreased then,but all treatments had no siginificant deviation.Endophytic fungi can increase the drought resistance of C.morifolium in a short period of water stress.