Pathogenicity and aggressiveness of Colletotrichum gloeosporioides isolates in ornamental pepper

Araújo, Neilton Antonio Fiusa; Vieira, Joana D ́arc Mendes; Moura, Marlene da Rocha; Pessoa, Wagner Rogério Leocádio Soares; Barguil, Beatriz Meireles

doi:10.1590/1983-40632016v4641483

Cited by 8 publications

(3 citation statements)

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“…However, anthracnose caused by species of the genus Colletotrichum is a common and destructive disease in diverse agricultural crops and forest species. Its global occurrence causes significant losses in tropical and subtropical regions (Araújo et al, 2016). Although the genus contains species with different lifestyles, plants can be infected during any stage of development and symptoms appear after colonization of fungi, which is characterized by necrotic lesions in leaves (Villa-Rivera et al, 2017).…”

Section: Resultsmentioning

confidence: 99%

Potential of Colletotrichum typhae H.C Greene mycoherbicide for bio-control of Southern cattail (Typha domingensis Pers.) plants

et al. 2020

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The anthropic interference in aquatic ecosystems favors the disordered colonization of T. domingensis, damaging the production of hydroelectric power and river traffic. Because of this, studies report the efficacy of fungal mycoherbicides, with control rates reaching as high as 90%. Thus, the objective of this study was to evaluate the potential of C. typhae as a mycoherbicide in bio control of T. domingensis, at in vitro and greenhouse conditions. 107 samples of symptomatic T. domingensis leaves were collected in flooded areas of rivers in Brazil, with identification and isolation of the collected fungal species. The concentration of inoculum was determined to evaluate the incidence and severity of the disease, the influence of temperature on mycelial growth and conidia germination, the effect of temperature and leaf wetness period on T. domingensis infection by C. typhae and the host range test in vitro. The growth of the colonies of C. typhae was higher at 25 to 30 ºC. There was no interference of the photoperiod on germination of the spores, but the highest percentage of germination was occurred at 20 ºC. The influence of environmental conditions on infection of inoculated leaves of T. dominguensis revealed that at 15 ºC and the period of leaf wetness of 48 hours the highest incidence of the disease was observed, as well as the severity for the same period of leaf wetness. The specificity test showed that C. typhae is specifically pathogenic to T. domingensis. This the first report of the occurrence of this pathogen in aquatic macrophytes of this species and in T. domingensis, a potential mycoherbicide for the control of this aquatic weed.

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Section: Resultsmentioning

confidence: 99%

Potential of Colletotrichum typhae H.C Greene mycoherbicide for bio-control of Southern cattail (Typha domingensis Pers.) plants

et al. 2020

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“…We evaluated the in vitro antifungal activities of compounds 1, 2, and 3 towards three plant pathogens: C. gloeosporioides, which is a major cause of anthracnose in many fruits and vegetables, such as mango (Mangifera indica L., Anacardiaceae) [22], litchi (Litchi chinensis Sonn., Sapindaceae) [23], chili pepper (Capsicum spp., Solanaceae), and scarlet eggplant (Solanum aethiopicum L., Solanaceae) [24]; C. musae, which has been reported to cause anthracnose, blossom end rot, crown rot, and tip rot in bananas (Musa spp., Musaceae) [25]; and F. oxysporum, which is the causal agent of Fusarium wilt and fruit rot in tomatoes (Solanum lycopersicum L., Solanaceae) [26]. All three compounds exhibited broadspectrum antifungal activities against the tested fungi (▶ Table 3).…”

Section: Resultsmentioning

confidence: 99%

Fusarihexins A and B: Novel Cyclic Hexadepsipeptides from the Mangrove Endophytic Fungus Fusarium sp. R5 with Antifungal Activities

et al. 2018

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Two novel cyclic hexadepsipeptides, fusarihexin A (1: ) and fusarihexin B (2: ), and two known compounds, cyclo-(L-Leu-L-Leu-D-Leu-L-Leu-L-Val) (3: ) and cyclo-(L-Leu-L-Leu-D-Leu-L-Leu-L-Ile) (4: ), were isolated from the marine mangrove endophytic fungus sp. R5. Their chemical structures were elucidated on the basis of spectroscopic data and Marfey's analysis. In an bioassay, fusarihexin A (1: ) remarkably inhibited three plant pathogenic fungi: (Penz.) Sacc., which causes anthracnose in many fruits and vegetables, (Berk. and M. A. Curtis) Arx, which causes crown rot and anthracnose in bananas, and Schlecht. f. sp. lycopersici (Sacc.) W. C. Snyder et H. N. Hansen, which causes Fusarium wilt and fruit rot in tomatoes. Fusarihexin B (2: ) strongly inhibited and . The compounds were more potent than carbendazim, which is widely used as an agricultural and horticultural fungicide worldwide.

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“…However, anthracnose caused by species of the genus Colletotrichum is a common and destructive disease in diverse agricultural crops and forest species. Its global occurrence causes significant losses in tropical and subtropical regions [39]. Although the genus contains species with different lifestyles, plants can be infected during any stage of development and symptoms appear after colonization of fungi, which is characterized by necrotic lesions in leaves [40].…”

Section: Resultsmentioning

confidence: 99%

Biological Potencial of Colletotrichum typhae H.C Greene mycoherbicide for Typha domingensis Pers

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et al. 2018

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24 The anthropic interference in aquatic ecosystems, favors the disordered colonization of T. domingensis, 25 damaging the production of hydroelectric power and river traffic. Thus, the objective of this study was 26 to evaluate the potential of C. typhae as a mycoherbicide in the control of T. domingensis, in vitro and 27 in greenhouse. 107 samples of symptomatic T. domingensis leaves were collected in flooded areas of 28 rivers in Brazil, with identification and isolation of the collected fungal species. The concentration of 29 inoculum was determined to evaluate the incidence and severity of the disease, the influence of 30 temperature on mycelial growth and conidia germination, the effect of temperature and leaf wetness 31 period on T. domingensis infection by C. typhae and the host range test. The growth of the colonies of 32 C. typhae was higher at 25 to 30 ºC, there was no interference of the photoperiod on germination of the 33 spores, but the highest percentage of germination occurred at 17.39 ºC. The influence of environmental 2 34 conditions on infection of inoculated leaves of T. dominguensis indicated that at 15 ºC and the period of 35 leaf wetness of 48 hours promoted the highest incidence of the disease, as well as the severity for the 36 same period of leaf wetness. The specificity test showed that C. typhae is specific and pathogenic to T. 37 domingensis. Being this the first report of the occurrence of this pathogen in aquatic macrophytes of 38 this species and in T. domingensis in Brazil. 39 Keywords: Biological control; Aquatic macrophytes, Leaf wetness 40 41 Introduction 42 Typha domingensis Pers. is an invasive macrophyte found in the Americas, Europe, Africa, Asia and 43 Oceania, being considered as a native species of South America, occurring throughout Brazil [1]. It is 44 propagated either by seeds or vegetatively, by rhizomes, with vigorous growth by the decomposition 45 and assimilation of organic matter as a source of nutrients, reaching about seven tons of rhizomes per 46 hectare [2]. Thus, T. domingensis is used as a biological filter for urban sewage, industrial effluents rich 47 in heavy metals and erosion control in drainage channels and reservoir banks [3]. 48However, anthropic interference in aquatic ecosystems favors the colonization of T. domingensis, 49 which may hinder the production of hydroelectric power, river traffic and agricultural irrigation [4]. In 50 the United States, this macrophyte accounts for the degradation of almost 12.000 ha -1 of Florida 51 marshes, due its aggressive growth in response to eutrophication by nitrates and phosphates from 52 agricultural and urban waste and frequent fires [5]. In Brazil, it is estimated that the intense growth of 53 T. domingensis in reservoirs of the country's hydroelectric dams extends to about 300 ha -1 in the water 54 mirror. These changes contribute to the reduction of water quality and biodiversity patterns in 55 environments colonized by this species [6]. 56Up to a certain limit, the development of aquatic vegetation c...

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Pathogenicity and aggressiveness of Colletotrichum gloeosporioides isolates in ornamental pepper

Cited by 8 publications

References 11 publications

Potential of Colletotrichum typhae H.C Greene mycoherbicide for bio-control of Southern cattail (Typha domingensis Pers.) plants

Potential of Colletotrichum typhae H.C Greene mycoherbicide for bio-control of Southern cattail (Typha domingensis Pers.) plants

Fusarihexins A and B: Novel Cyclic Hexadepsipeptides from the Mangrove Endophytic Fungus Fusarium sp. R5 with Antifungal Activities

Biological Potencial of Colletotrichum typhae H.C Greene mycoherbicide for Typha domingensis Pers

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