scholarly journals Analysis of Antagonistic Potential of Secondary Metabolites and Organic Fractions of Trichoderma Species against Alternaria Alternata

2019 ◽  
Vol 24 (2) ◽  
pp. 81-88 ◽  
Author(s):  
SHAZIA SHAFIQUE ◽  
SOBIYA SHAFIQUE ◽  
ALINA JAVED ◽  
NAUREEN AKHTAR ◽  
SHUMAILA BIBI
Keyword(s):  
Secondary Metabolites ◽  
Alternaria Alternata ◽  
Trichoderma Species ◽  
Antagonistic Potential ◽  
Organic Fractions

scholarly journals Efficacy of Trichoderma against Colletotrichum capsici Causing Fruit Rot Due to Anthracnose of Chili (Capsicum annum L.)

2018 ◽  
Vol 16 (02) ◽  
pp. 75-87 ◽  
Author(s):  
MA Rahman ◽  
TH Ansari ◽  
MF Alam ◽  
JR Moni ◽  
M Ahmed
Keyword(s):  
Secondary Metabolites ◽  
Fruit Yield ◽  
Spore Suspension ◽  
Fruit Rot ◽  
Growth And Yield ◽  
Trichoderma Species ◽  
Colletotrichum Capsici ◽  
High Inoculum ◽  
And Control ◽  
Inoculum Pressure

Five Trichoderma species/strains, Trichoderma virens IMI-392430, T. pseudokoningii IMI-392431, T. harzianum IMI-392432, T. harzianum IMI-392433 and T. harzianum IMI-392434 were tested against anthracnose and fruit rot of chilli. Effect of Trichoderma species in suppressing anthracnose and fruit rot as well as the growth and yield of chilli were evaluated. Seven treatments consisting of five Trichoderma strains, one Colletotrichum capsici and control were used as seed treatments. Chilli seeds were treated with spore suspension or secondary metabolites of each Trichoderma species/strain and C. capsici separately. Mixture of suspension of each Trichoderma species/strain with C. capsici was also used as spore suspension or secondary metabolites. Percent fruit infection in the control treatment was found almost similar to the treatment that contained T. viridae and T. pseudokoningii spore suspension or secondary metabolites. T. harzianum strains alone suppressed fruit infection (%) significantly. Further all the Trichoderma species/strains reduced the fruit infection (%) than the diseased control even when seeds were treated with Trichoderma separately mixing with C. capsici. Spore suspension of T. harzianum IMI-392433 was found much more effective against C. capsici which suppressed 95.8% and 79.6 % fruit infection respectively under natural (without C. capsici) and high inoculum pressure of C. capsici. All the tested Trichoderma species/strains showed higher plant growth and increased fruit yield irrespective of rest of the treatments. It was found that Trichoderma strains control chilli fruit rot significantly but high inoculum pressure of C. capsici reduced fruit yield drastically. Among the treatments, spore suspension of T. harzianum IMI-392433 increased the fruit yield 83.6% and 76.5% per plant compared to spore suspension of C. capsici and control treatments, respectively. These results implied that T. harzianum IMI-392433 can effectively control fruit rot of chili caused by C. capsici through host resistance and antifungal metabolite activity. The fruit yield was increased due to the influence of T. harzianum IMI-392433 on vigorous physiological growth of plants as well as efficacy against the disease. The Agriculturists 2018; 16(2) 75-87

scholarly journals Identification and evaluation of secondary metabolites by gas chromatography-mass spectrometry (GC-MS) in native strains of Trichoderma species

2018 ◽  
Vol 17 (37) ◽  
pp. 1162-1171 ◽  
Author(s):  
Hadassa Yuef Martínez-Padrón ◽  
Jorge Ariel Torres-Castillo ◽  
Raúl Rodríguez-Herrera ◽  
José Alberto López-Santillán ◽  
Benigno Estrada-Drouaillet ◽  
...  
Keyword(s):  
Mass Spectrometry ◽  
Gas Chromatography ◽  
Secondary Metabolites ◽  
Gas Chromatography Mass Spectrometry ◽  
Trichoderma Species ◽  
Chromatography Mass Spectrometry ◽  
Native Strains

scholarly journals Bioactive Secondary Metabolites from Trichoderma spp. against Phytopathogenic Fungi

2020 ◽  
Vol 8 (6) ◽  
pp. 817 ◽  
Author(s):  
Raja Asad Ali Khan ◽  
Saba Najeeb ◽  
Shaukat Hussain ◽  
Bingyan Xie ◽  
Yan Li
Keyword(s):  
Secondary Metabolites ◽  
Management Strategies ◽  
Pathogenic Fungi ◽  
Phytopathogenic Fungi ◽  
Biocontrol Agents ◽  
Fungal Resistance ◽  
Comprehensive Overview ◽  
Trichoderma Spp ◽  
Trichoderma Species ◽  
Global Food Security

Phytopathogenic fungi, causing significant economic and production losses, are becoming a serious threat to global food security. Due to an increase in fungal resistance and the hazardous effects of chemical fungicides to human and environmental health, scientists are now engaged to explore alternate non-chemical and ecofriendly management strategies. The use of biocontrol agents and their secondary metabolites (SMs) is one of the potential approaches used today. Trichoderma spp. are well known biocontrol agents used globally. Many Trichoderma species are the most prominent producers of SMs with antimicrobial activity against phytopathogenic fungi. Detailed information about these secondary metabolites, when grouped together, enhances the understanding of their efficient utilization and further exploration of new bioactive compounds for the management of plant pathogenic fungi. The current literature provides the information about SMs of Trichoderma spp. in a different context. In this review, we summarize and group different antifungal SMs of Trichoderma spp. against phytopathogenic fungi along with a comprehensive overview of some aspects related to their chemistry and biosynthesis. Moreover, a brief overview of the biosynthesis pathway, action mechanism, and different approaches for the analysis of SMs and the factors affecting the regulation of SMs in Trichoderma is also discussed.

scholarly journals Antibacterial activity of secondary metabolites isolated from Alternaria alternata

2015 ◽  
Vol 14 (43) ◽  
pp. 2972-2994 ◽  
Author(s):  
A Kamal Sabreen ◽  
Fadhil Hamza Lena ◽  
Hadi Hameed Imad
Keyword(s):  
Antibacterial Activity ◽  
Secondary Metabolites ◽  
Alternaria Alternata

scholarly journals Discoloured seeds of amaranth plant infected by Alternaria alternata: physiological, histopathological alterations and fungal secondary metabolites associated or registered

2016 ◽  
Vol 56 (3) ◽  
pp. 244-249
Author(s):  
María Cristina Noelting ◽  
Marina Sisterna ◽  
Marcelo Lovisolo ◽  
Andrés Molla-Kralj ◽  
Gladys Lori ◽  
...  
Keyword(s):  
Secondary Metabolites ◽  
Alternaria Alternata ◽  
Histopathological Changes ◽  
Tenuazonic Acid ◽  
Histopathological Alterations ◽  
Production And Consumption ◽  
High Concentrations ◽  
Fungal Secondary Metabolites

Abstract In the present study the aspects of discolouration that could influence both the production and consumption of amaranth were analyzed with the objectives to identify the presence of Alternaria alternata on seeds, to analyze possible changes in the anatomy of seed tissues and to detect the presence of fungal secondary metabolites. Component plating, histopathological and mycological analyses on discoloured seeds allowed i) location of propagules of A. alternata in all seminal components; ii) observation of hypertrophies in perisperm and embryo and iii) determination of several fungal secondary metabolites, mainly high concentrations of tenuazonic acid. To our knowledge, the information presented in this paper, related to physiological, histopathological changes and fungal secondary metabolites on discoloured seeds of (Amaranthus mantegazzianus syn. A. caudatus subsp. mantegazzianus (Pass) Hanelt affected by A. alternata, is the first worldwide record.

Inhibition of Phytophthora species, agents of cocoa black pod disease, by secondary metabolites of Trichoderma species

2017 ◽  
Vol 25 (30) ◽  
pp. 29901-29909 ◽  
Author(s):  
Gilles-Alex Pakora ◽  
Joseph Mpika ◽  
Daouda Kone ◽  
Michel Ducamp ◽  
Ismael Kebe ◽  
...  
Keyword(s):  
Secondary Metabolites ◽  
Phytophthora Species ◽  
Trichoderma Species ◽  
Black Pod ◽  
Black Pod Disease

scholarly journals Whole Genome Sequence of Alternaria alternata, the Causal Agent of Black Spot of Kiwifruit

2021 ◽  
Vol 12 ◽  
Author(s):  
Ke Huang ◽  
Jianming Tang ◽  
Yong Zou ◽  
Xiangcheng Sun ◽  
Jianbin Lan ◽  
...  
Keyword(s):  
Secondary Metabolites ◽  
Virulence Factors ◽  
Genome Sequence ◽  
Alternaria Alternata ◽  
Black Spot ◽  
Transcriptional Regulators ◽  
Whole Genome Sequence ◽  
Economic Losses ◽  
Wide Range ◽  
Host Specific Toxins

Alternaria alternata is a pathogen in a wide range of agriculture crops and causes significant economic losses. A strain of A. alternata (Y784-BC03) was isolated and identified from “Hongyang” kiwifruit and demonstrated to cause black spot infections on fruits. The genome sequence of Y784-BC03 was obtained using Nanopore MinION technology. The assembled genome is composed of 33,869,130bp (32.30Mb) comprising 10 chromosomes and 11,954 genes. A total of 2,180 virulence factors were predicted to be present in the obtained genome sequence. The virulence factors comprised genes encoding secondary metabolites, including non-host-specific toxins, cell wall-degrading enzymes, and major transcriptional regulators. The predicted gene clusters encoding genes for the biosynthesis and export of secondary metabolites in the genome of Y784-BC03 were associated with non-host-specific toxins, including cercosporin, dothistromin, and versicolorin B. Major transcriptional regulators of different mycotoxin biosynthesis pathways were identified, including the transcriptional regulators, polyketide synthase, P450 monooxygenase, and major facilitator superfamily transporters.

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