Antifungal furanoterpenoids of sweet potato in relation to pathogenic and non-pathogenic fungi

Arinze, A. E.; Smith, Ian M.

doi:10.1016/0048-4059(80)90047-8

Cited by 7 publications

(6 citation statements)

References 14 publications

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“…After 14 days, the tubers were sectioned across the inoculation point, and the extent of rot zones determined as in Arinze & Smith (1979). Results for 5. theobromae, B. cinerea and C. cucumerinum were very similar to those previously obtained in the experiments of Arinze & Smith (1979, 1980, 1982: C cucumerinum caused no rotting, B. cinerea, P. exigua and F. solani rotted the tissue to a depth of about 5 mm and B. theobromae rotted the tissue to a depth of about 25 mm.…”

Section: Rotting Of Tubers By the Fungisupporting

confidence: 89%

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Distribution of polygalacturonase, total phenolic substances, polyphenol oxidase and peroxidase in rot zones in sweet potato

Arinze

Smith

1982

Plant Pathology

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Botryodiplodia theobromae causes a spreading rot of sweet potato, while Botrytis cinerea, Phoma exigua var. foveata and Fusarium solani var. coeruleum cause rots of limited extent. Cladosporium cucumerinum does not rot sweet potato tuber tissue. Whichever of these fungi is inoculated into tubers, a zone at the margin of the lesion can be clearly distinguished, from slightly affected but uninfected tissue on one side and infected rotted tissue on the other, by its high content of phenolic substances and polyphenol oxidase and peroxidase activities.Polygalacturonase is present in this zone for spreading B. theobromae lesions but not for the limited lesions caused by the other fungi. Total content of phenolic substances is generally greater in and around limited lesions.

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Section: Rotting Of Tubers By the Fungisupporting

confidence: 89%

“…Thus, it seems unlikely that they are the only factors determining whether lesions spread or not. The accumulation of phytoalexins by the host, and their breakdown by the successful pathogen, may be more important in the sweet potato rot system (Arinze & Smith, 1980).…”

Section: Discussionmentioning

confidence: 99%

Distribution of polygalacturonase, total phenolic substances, polyphenol oxidase and peroxidase in rot zones in sweet potato

Arinze

Smith

1982

Plant Pathology

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“…), the most notorious metabolites induced by SPWs and other plant pathogens, have also shown defensive properties against fungi. 6,34 Accumulation of these toxic compounds from sweet potatoes in cattle would cause hepatoxicity, pneumonia, and deaths. 6 From SPW larvae-infested sweet potato roots, we identified four monoterpene alcohols which elicited antennal responses and influenced the behavioral preference of SPW adults (Figs 2 and 3).…”

Section: Discussionmentioning

confidence: 99%

“…6,43,44 Furanoterpenoids, especially ipomeamarone, could significantly inhibit several sweet potato pathogens, including Botrytis cinerea and Cladosporium cucumerinum. 34 However, there is little evidence of SPW being influenced by furanoterpenoids. Our behavioral experiments showed that ipomeamarone had no repellence to SPW adults (Fig.…”

Section: Discussionmentioning

confidence: 99%

“…Additionally, furanoterpenoids (e.g., ipomeamarone, ipomeanol, ipomeanine, dehydro‐ipomeamarone, etc. ), the most notorious metabolites induced by SPWs and other plant pathogens, have also shown defensive properties against fungi 6,34 . Accumulation of these toxic compounds from sweet potatoes in cattle would cause hepatoxicity, pneumonia, and deaths 6 .…”

Section: Discussionmentioning

confidence: 99%

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Monoterpene alcohols induced by sweet potato weevil larvae deter conspecific adults from feeding and oviposition

Liu

Zhang

Wang

et al. 2023

Pest Management Science

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BACKGROUNDIntraspecific competition is shared in the insect world, especially under the condition of limited food and space resources. To avoid intraspecific competition and increase offspring survival, insects have evolved various effective strategies. A widely‐accepted tactic is employing chemical cues, which are frequently utilized as indicators of conspecific colonization. The sweet potato weevil (SPW), Cylas formicarius, is a destructive pest of sweet potatoes. Its larvae bore into sweet potatoes and alter the emission of odors. The present study aimed to investigate whether volatiles associated with SPW larvae feeding influence the behavioral preference of conspecific adults.RESULTSVolatiles from SPW larvae‐infested sweet potatoes were collected by a head‐space method and analyzed using gas chromatography‐electroantennogram detector (GC‐EAD) and gas chromatography–mass spectrometry (GC–MS). Five compounds eliciting EAD responses from the antennae of both male and female adult SPW were identified from sweet potatoes with the third‐instar larvae, including linalool, citronellol, nerol, geraniol, and ipomeamarone. Four monoterpene alcohols significantly repelled SPW adults from feeding and oviposition at higher doses in the behavioral preference bioassays. Among them, geraniol displayed the strongest repellent activities for SPW feeding and oviposition. These results suggested that SPW larvae could reduce colonization of adult SPWs by inducing monoterpene alcohols, thereby avoiding intraspecific competition.CONCLUSIONThe present study demonstrated that volatile monoterpene alcohols induced by SPW larvae are chemical cues of larvae occupation for SPW adults to change their behavioral preference. Unveiling factors that mediate avoidance of intraspecific competition could help develop repellents or oviposition deterrents for SPW control. © 2023 Society of Chemical Industry.

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Non-Host Resistance to Fungi

Ride¹

1985

Mechanisms of Resistance to Plant Diseases

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Antifungal furanoterpenoids of sweet potato in relation to pathogenic and non-pathogenic fungi

Cited by 7 publications

References 14 publications

Distribution of polygalacturonase, total phenolic substances, polyphenol oxidase and peroxidase in rot zones in sweet potato

Distribution of polygalacturonase, total phenolic substances, polyphenol oxidase and peroxidase in rot zones in sweet potato

Monoterpene alcohols induced by sweet potato weevil larvae deter conspecific adults from feeding and oviposition

Non-Host Resistance to Fungi

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