Objective To study the value-added effect of dibutylphthalate (DBP) on the pathogenic Fusarium in lily rhizosphere soil and its effect on the ultrastructure of the fungal cells,and to clarify the effect of DBP on the allelopathy of Fusarium. Method In the experimental setup of 7 DBP concentration treatments,four Fusarium species (F.oxysporum,F.solani,F.tricinctum,and F.avenaceum) were cultured on the medium supplemented with DBP,and the growth and spore production as well as the submicroscopic structure of F.oysporum cells were measured. Result DBP had a significant allelopathy inhibitory effect on Fusarium strains.Within the DBP concentration range of 0.05 mmol/L to 4.00 mmol/L,the colony growth rate decreased with increasing concentration,while the spore production decreased,resulting in an increase in synthetic index.The submicroscopic observation results showed that under the DBP treatment on F.oxysporum,both the fungal hyphae and spores were constricted and malformed,and these changes seem to be more serious with the increase of DBP concentration.In addition,plasmolysis was observed in some cells,and the cell wall and plasma membrane were disturbed,and some kind of black particles appeared in the cells. Conclusion These results suggest that DBP has allelopathic inhibitory effect on the growth and development of Fusarium,the pathogenic fungi of Lanzhou lily wilt,and its pathogenicity,so it can be tried to apply it to the prevention and control of lily pathogenic continuous cropping disorder and soil-borne diseases.
ShiG Y, SunH Q, Calderón-UrreaA,et al.Soil fungal diversity loss and appearance of specific fungal pathogenic communities associated with the consecutive replant problem(CRP) in lily[J].Frontiers in Microbiology,2020,11:1649.
PramanikM, NagaiM, AsaoT,et al.Effects of temperature and photoperiod on phytotoxic root exudates of cucumber (Cucumis sativus) in hydroponic culture[J].Journal of Chemical Ecology,2000,26(8):1953-1967.
BanghamA D, StandishM M, WeissmannG.The action of steroids and streptolysin S on the permeability of phospholipid structures to cations[J].Journal of Molecular Biology,1965,13(1):253,N28-N259.
BaisH P, WeirT L, PerryL G,et al.The role of root exudates in rhizosphere interactions with plants and other organisms.[J].Annual Review of Plant Biology,2006,57(1):233-266.
WilliamsonG B, RichardsonD.Bioassays for allelopathy:measuring treatment responses with independent controls[J].Journal of chemical ecology,1988,14(1):181-187.
XuG, LiF, WangQ.Occurrence and degradation characteristics of dibutyl phthalate (DBP) and di-(2-ethylhexyl) phthalate (DEHP) in typical agricultural soils of China[J].Science of the Total Environment,2008,393(2/3):333-340.
[33]
WuZ, YangL, WangR,et al.In vitro study of the growth,development and pathogenicity responses of Fusarium oxysporum to phthalic acid,an autotoxin from Lanzhou lily[J].World Journal of Microbiology and Biotechnology.2015,31(8):1227-1234.
[34]
ZhangY, TaoY, SunG,et al.Effects of di-n-butyl phthalate on the physiology and ultrastructure of cucumber seedling roots[J].Environmental Science and Pollution Research International,2014,21:6662-6670.
Al-AskarA A, BakaZ A, RashadY M,et al.Evaluation of Streptomyces griseorubens E44G for the biocontrol of Fusarium oxysporum f.sp.lycopersici:ultrastructural and cytochemical investigations[J].Annals of Microbiology,2015,65(4):1815-1824.
[38]
MohamedM, SalehA M, Abdel-FaridI B,et al.Growth,hydrolases and ultrastructure of Fusarium oxysporum as affected by phenolic rich extracts from several xerophytic plants[J].Pesticide Biochemistry & Physiology,2017:141:57-64.
BanghamA D, StandishM M, WeissmannG.The action of steroids and streptolysin S on the permeability of phospholipid structures to cations.[J].Journal of Molecular Biology.1965,13(1):253-259.
[43]
LasičD D, KidričJ, ZagorcS.A simple method for the preparation of small unilamellar vesicles[J].BBA-Biomembranes,1987,896(1):117-122.