Antagonistic potential of Gliocladium virens and Trichoderma longibrachiatum to phytopathogenic fungi

1990 ◽  
Vol 109 (1) ◽  
pp. 19-26 ◽  
Author(s):  
S. Sreenivasaprasad ◽  
K. Manibhushanrao
Keyword(s):  
Phytopathogenic Fungi ◽  
Trichoderma Longibrachiatum ◽  
Gliocladium Virens ◽  
Antagonistic Potential

scholarly journals Sesquiterpenes and Cyclodepsipeptides from Marine-Derived Fungus Trichoderma longibrachiatum and Their Antagonistic Activities against Soil-Borne Pathogens

Marine Drugs ◽  
2020 ◽  
Vol 18 (3) ◽  
pp. 165 ◽  
Author(s):  
Feng-Yu Du ◽  
Guang-Lin Ju ◽  
Lin Xiao ◽  
Yuan-Ming Zhou ◽  
Xia Wu
Keyword(s):  
Phytopathogenic Fungi ◽  
Economic Losses ◽  
The Novel ◽  
Root Knot Nematode ◽  
Trichoderma Longibrachiatum ◽  
Soil Borne Pathogens ◽  
Antifungal Potential ◽  
Antagonistic Potential ◽  
Southern Root Knot Nematode ◽  
Better Than

Soil-borne pathogens, including phytopathogenic fungi and root-knot nematodes, could synergistically invade vegetable roots and result in serious economic losses. The genus of Trichoderma has been proven to be a promising reservoir of biocontrol agents in agriculture. In this study, the search for antagonistic metabolites from a marine-derived fungus, Trichoderma longibrachiatum, obtained two structural series of sesquiterpenes 1–6 and cyclodepsipeptides 7–9. Notably, the novel 1 was a rare norsesquiterpene characterized by an unprecedented tricyclic-6/5/5-[4.3.1.01,6]-decane skeleton. Their structures were elucidated by extensive spectroscopic analyses, while the absolute configuration of novel 1 was determined by the comparison of experimental and calculated ECD spectra. The novel 1 and known 2 and 3 showed significant antifungal activities against Colletotrichum lagrnarium with MIC values of 8, 16, and 16 μg/mL respectively, even better than those of the commonly used synthetic fungicide carbendazim with 32 μg/mL. They also exhibited antifungal potential against carbendazim-resistant Botrytis cinerea. Cyclodepsipeptides 7–9 showed moderate nematicidal activities against the southern root-knot nematode (Meloidogyne incognita). This study constitutes the first report on the antagonistic effects of metabolites from T. Longibrachiatum against soil-borne pathogens, also highlighting the integrated antagonistic potential of marine-derived T. Longibrachiatum as a biocontrol agent.

Endophytic fungi from the medicinal plant Aloe dhufarensis Lavranos exhibit antagonistic potential against phytopathogenic fungi

2020 ◽  
Author(s):  
Fatma Khuseib Hamed Al-Rashdi ◽  
Abdullah Mohammed Al-Sadi ◽  
Bahja Z. Al-Riyamy ◽  
Sajeewa S.N. Maharachchikumbura ◽  
Jamal Nasser Al-Sabahi ◽  
...  
Keyword(s):  
Medicinal Plant ◽  
Endophytic Fungi ◽  
Phytopathogenic Fungi ◽  
Antagonistic Potential

The antagonistic properties of Trichoderma spp. inhabiting woods for potential biological control of wood-damaging fungi

Holzforschung ◽  
2012 ◽  
Vol 66 (7) ◽  
pp. 883-887 ◽  
Author(s):  
Jaejung Lee ◽  
Nayoon Huh ◽  
Joo Hyun Hong ◽  
Beom Seok Kim ◽  
Gyu-Hyeok Kim ◽  
...  
Keyword(s):  
Biological Control ◽  
Chitinase Activity ◽  
Dual Culture ◽  
Trichoderma Spp ◽  
Trichoderma Longibrachiatum ◽  
Antagonistic Effects ◽  
Volatile Metabolites ◽  
Antagonistic Potential ◽  
Trichoderma Aureoviride

Abstract The antagonistic potential of Trichoderma spp. for biological control of wood-damaging fungi was investigated in the present paper. In vitro assays to investigate antifungal characteristics of Trichoderma spp. were conducted with various wood-damaging fungi. Exo-chitinase activity of the isolates was also measured. Three typical wood decayers and three sap-stainers served as target fungi. The antagonistic abilities of each Trichoderma species differed markedly according to the target fungus. The growth inhibition rates shown by the non-volatile metabolites against the wood decayers reached 100% for Trichoderma harzianum KUC1459. The antibiotics produced by Trichoderma dorotheae KUC5027, a recently reported species of Trichoderma, revealed strong antagonistic effects against sap-stainers. Trichoderma gamsii KUC1747 effectively inhibited the growth of all wood-damaging fungi in dual culture tests. The exo-chitinases of Trichoderma longibrachiatum KUC1540, Trichoderma aureoviride KUC1335, and T. harzianum KUC1459 showed significantly high activity.

Биологические препараты против болезней растений

2018 ◽  
Author(s):  
F.S. Dzhalilov
Keyword(s):  
Plant Protection ◽  
Protective Action ◽  
Trichoderma Viride ◽  
Economic Benefits ◽  
Phytopathogenic Fungi ◽  
Food Sources ◽  
Active Growth ◽  
Biological Products ◽  
Gliocladium Virens ◽  
Biological Protection

Изложены факторы, способствующие развитию биологического метода защиты растений от болезней: неэффективность химических средств против ряда вредоносных заболеваний, опасность химических препаратов для здоровья человека и окружающей природной среды, удобство и экономическая выгода использования ряда биопрепаратов, соответствие современным требованиям для технологий защищенного грунта, которые предусматривают использование биологических объектов (например, насекомых-опылителей). Представлены теоретические основы биологической защиты растений от болезней – типы экологических отношений между организмами: сосуществование (отсутствие отрицательной зависимости между численностью взаимодействующих популяций), антагонизм (конкуренция за источники питания, антибиоз, паразитизм, гиперпаразитизм). Дана характеристика основным группам микроорганизмов, на основе которых созданы биопрепараты: грибы Trichoderma viride, T. harzianum, T. koningii; Gliocladium virens), бактериии (виды родов Pseudomonas и Bacillus), вирусам и механизмам их защитного действия (для Trichoderma – направленный рост гиф антагониста в направлении к метаболитам гриба-хозяина, оплетение гифов гриба-хозяина и перфорация клеточной стенки хозяина, последующая полная колонизация хозяина, проникновение в мицелий хозяина, активный рост внутри клеток, гибель мицелия гриба-хозяина; для Pseudomonas – образование стабильных комплексов с трехвалентным железом, связывание ионов трехвалентного железа в почве, как следствие – лишение многих видов фитопатогенных грибов необходимого элемента питания, что приводит к остановке их развития). Указано на значение контроля показателей качества препаратов для успешной защиты растений от болезней (титр, чистота и биологическая активность).The factors contributing to the development of the biological method of plant protection from diseases are described: the inefficiency of chemicals against a number of harmful diseases, the danger of chemicals for human health and the environment, the convenience and economic benefits of the use of a number of biological products, compliance with modern requirements for protected soil technologies, which provide for the use of biological objects (for example, pollinators). Theoretical bases of biological protection of plants from diseases-types of ecological relations between organisms are presented: coexistence (absence of negative dependence between the number of interacting populations), antagonism (competition for food sources, antibiosis, parasitism, hyperparasitism). The characteristics of the main groups of microorganisms on the basis of which biological products are given: fungi Trichoderma viride, T.harzianum, T. koningii; Gliocladium virens), bacteriae (species of the genera Bacillus and Pseudomonas), viruses and the mechanisms of their protective action (for Trichoderma – directed growth of the hyphae of the antagonist towards the metabolites of the fungus-host entanglement of the hyphae of the fungus-host and perforation of the cell wall of the host, to the complete colonization of the host, penetration into the host mycelium, the active growth inside the cells, the death of the mycelium of the fungus-host; for Pseudomonas – the formation of stable complexes with trivalent iron, binding of ferric ions in the soil, as a consequence – the deprivation of many species of phytopathogenic fungi necessary element of nutrition, which leads to a halt in their development). The importance of monitoring the quality of preparations for the successful protection of plants from diseases are noted: titer, purity and biological activity.

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