The wheat scab and root rot disease, caused by Bipolarissorokiniana, can occur throughout the entire growth period of wheat. It can lead to partial or total plant death and is one of the difficult diseases to control in wheat crop production. Given the significant application value of fungi from the genus Chaetomium in the biological control of plant diseases, this experiment aimed to explore the potential of using C. globosum 22-10 for the biological control of this disease. In this experiment, C. globosum 22-10 was selected to conduct flat confrontation and spore germination inhibition tests on Bipolarissorokiniana, and the prevention and treatment group experiments were designed to study the field prevention and treatment effects of C. globosum 22-10 fermentation broth with different dilution ratios on leaf spot-type and root rot-type symptoms of wheat root rot. The results show that both the 1-fold and 3-fold diluted fermentation broth of C. globosum 22-10 had about 45% of the colony growth inhibition rate of Bipolarissorokiniana, which was comparable to the effect of the chemical fungicide pyriferin; The 1-15-fold diluted fermentation broth of 22-10 inhibited the spore germination rate of Bipolaris sorokiniana by more than 85%, and could lead to malformation of the bud tube of pathogens and inhibit the elongation of the bud tube. The 1-5-fold diluted fermentation broth of C. globosum 22-10 had a preventive effect on root rot-type symptoms of wheat root rot by 87.50% ~ 100.00%, and the treatment effect was 64.60% ~ 96.46%; the prevention effect on leaf spot-type symptoms of wheat root rot was 76.23% ~ 93.21%, and the treatment effect was 23.10% ~ 90.83%. The prevention effect on wheat root rot of both symptoms was better than the treatment effect. This experiment confirmed that C. globosum 22-10 exhibited significant antagonistic activity against Bipolarissorokiniana, effectively inhibiting the growth of its mycelium and the germination of its spores. Field trials also showed excellent control effects on wheat leaf spot and root rot symptoms. This research provides an effective candidate strain for the biological control of wheat scab and root rot disease, which is of great significance for promoting the development of green pesticides and the sustainable development of agriculture.
KumarM, ChandR, DubeyR S, et al. Effect of Tricyclazole on morphology, virulence and enzymatic alterations in pathogenic fungi Bipolaris sorokiniana for management of spot blotch disease in barley[J]. World Journal of Microbiology and Biotechnology, 2015, 31(01): 23-35.
ManamgodaD S, RossmanA Y, CastleburyL A, et al. The genus Bipolaris [J]. Studies in Mycology, 2014, 79(01): 221-288.
[5]
HungP M, WattanachaiP, KasemS, et al. Efficacy of Chaetomium species as biological control agents against Phytophthora nicotianae root rot in citrus[J]. Mycobiology, 2015, 43(03): 288-296.
ParkJ H, ChoiG J, JangK S, et al. Antifungal activity against plant pathogenic fungi of chaetoviridins isolated from Chaetomium globosum[J] FEMS Microbiology Letters, 2005, 252(02):309-313.
[9]
KamatS, KumariM, SajnaKV, et al. Endophytic fungus, Chaetomium globosum, associated with marine green alga, a new source of Chrysin[J]. Scientific Reports, 2020, 10(01):18726.
[10]
AndrewsJ H, BerbeeF M, NordheimE V. Microbial antagonism to the imperfect stage of the apple scab pathogen, Venturia inaequalis[J]. Phytopathology, 1983, 73(02):228-234.
[11]
ShanthiyaaV, SaravanakumarD, RajendranL, et al. Use of Chaetomium globosum for biocontrol of potato late blight disease[J]. Crop Protection, 2013, 52: 33-38.
[12]
ZhaoS S, ZhangY Y, YanW, et al. Chaetomium globosum CDW7, a potential biological control strain and its antifungal metabolites[J]. FEMS Microbiology Letters, 2017, 364(03): fnw287.
[13]
XueY H, LiA, LiH, et al. Metabolite profiling reveals comprehensive effects of Chaetomium globosum on citrus preservation[J]. Food Chemistry, 2022, 369:130959.
JiangC, SongJ, ZhangJ, et al. Identification and characterization of the major antifungal substance against Fusarium sporotrichioides from Chaetomium globosum [J]. World Journal of Microbiology and Biotechnology, 2017, 33(06): 108.
SinghD P, KumarA, SolankiI S, et al. Management of spot blotch of wheat caused by Bipolaris sorokiniana in wheat using fungicides[J]. Indian Phytopathology, 2014, 67(03): 308-310.
BahadarK, MunirA, AsadS. Management of Bipolaris sorokiniana the causal pathogen of spot blotch of wheat by eucalyptus extracts[J]. Journal of Plant Pathology & Microbiology. 2016, 07(01): 1000326
[23]
KekudaT R, AkarshS, NawazA, et al. In vitro antifungal activity of some plants against Bipolaris sorokiniana (Sacc.) Shoem[J]. International Journal of Current Microbiology and Applied Sciences, 2016, 05(06): 331-337.
GaoB L, XiaoY W, ZhangQ, et al. Concurrent production of glycyrrhetic acid 3-O-mono-β-D- glucuronide and lignocellulolytic enzymes by solid-state fermentation of a plant endophytic Chaetomium globosum [J]. Bioresources and Bioprocessing, 2021, 08(01): 88.
HeyeC C, AndrewsJ H. Antagonism of Athelia bombacina and Chaetomium globosum to the apple scab pathogen, Venturia inaequalis [J]. Phytopathology, 1983, 73(05): 650-654.
[37]
AggarwalR, TewariA K, SrivastavaK D, et al. Role of antibiosis in the biological control of spot blotch (Cochliobolus sativus) of wheat by Chaetomium globosum [J]. Mycopathologia, 2004, 157(04): 369-377.
[38]
XiaoY, LiH X, LiC, et al. Antifungal screening of endophytic fungi from Ginkgo biloba for discovery of potent anti-phytopathogenic fungicides[J]. FEMS Microbiology Letters, 2013, 339(02): 130-136.
[39]
MondolM A M, FarthouseJ, IslamM T, et al. A new lactone from Chaetomium globosum strain M65 that inhibits the motility of zoospores[J]. Natural Product Communications, 2016, 11(12): 1865-1868.