HOST PLANT SPECTRUM AND TEMPERATURE LIMITATIONS OF <i>DIABROTICA BALTEATA</i>

Saba, F.

doi:10.4039/ent102684-6

Cited by 29 publications

(25 citation statements)

References 3 publications

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“…Given the broad host range of D. balteata larvae (Saba, 1970) and pest pressures exerted by WCR larvae, including the promotion of secondary disease (Flint-Garcia et al, 2009;Gray et al, 2009), we conducted controlled Diabrotica-maize interaction experiments. In growth chamber assays, tissue extracts of roots revealed both b-selinene and b-costic acid following damage by WCR larvae (Fig.…”

Section: Identification Of A-and B-selinene-derived Products As Inducmentioning

confidence: 99%

Selinene Volatiles Are Essential Precursors for Maize Defense Promoting Fungal Pathogen Resistance

et al. 2017

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To ensure food security, maize (Zea mays) is a model crop for understanding useful traits underlying stress resistance. In contrast to foliar biochemicals, root defenses limiting the spread of disease remain poorly described. To better understand belowground defenses in the field, we performed root metabolomic profiling and uncovered unexpectedly high levels of the sesquiterpene volatile b-selinene and the corresponding nonvolatile antibiotic derivative b-costic acid. The application of metabolite-based quantitative trait locus mapping using biparental populations, genome-wide association studies, and nearisogenic lines enabled the identification of terpene synthase21 (ZmTps21) on chromosome 9 as a b-costic acid pathway candidate gene. Numerous closely examined b-costic acid-deficient inbred lines were found to harbor Zmtps21 pseudogenes lacking conserved motifs required for farnesyl diphosphate cyclase activity. For biochemical validation, a full-length ZmTps21 was cloned, heterologously expressed in Escherichia coli, and demonstrated to cyclize farnesyl diphosphate, yielding b-selinene as the dominant product. Consistent with microbial defense pathways, ZmTps21 transcripts strongly accumulate following fungal elicitation. Challenged field roots containing functional ZmTps21 alleles displayed b-costic acid levels over 100 mg g 21 fresh weight, greatly exceeding in vitro concentrations required to inhibit the growth of five different fungal pathogens and rootworm larvae (Diabrotica balteata). In vivo disease resistance assays, using ZmTps21 and Zmtps21 near-isogenic lines, further support the endogenous antifungal role of selinene-derived metabolites. Involved in the biosynthesis of nonvolatile antibiotics, ZmTps21 exists as a useful gene for germplasm improvement programs targeting optimized biotic stress resistance.

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Section: Identification Of A-and B-selinene-derived Products As Inducmentioning

confidence: 99%

Selinene Volatiles Are Essential Precursors for Maize Defense Promoting Fungal Pathogen Resistance

et al. 2017

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“…Saba (1970) reported that banded cucumber beetle adults died after two days exposure to Ϫ6ЊC. However, Elsey (1989) showed that although banded cucumber beetles are intolerant of severe freezing conditions, adults can become acclimatized to cold temperatures and survive in subfreezing temperatures.…”

Section: Discussionmentioning

confidence: 96%

“…The northern range of the banded cucumber beetle is limited to areas where hard freezes seldom occur (Saba 1970;Krysan 1986;Elsey 1988Elsey , 1989. Saba (1970) reported that banded cucumber beetle adults died after two days exposure to Ϫ6ЊC.…”

Section: Discussionmentioning

confidence: 98%

“…The spotted cucumber beetle (or southern corn rootworm), Diabrotica undecimpunctata howardi Barber; the banded cucumber beetle, Diabrotica balteata LeConte; and the striped cucumber beetle, Acalymma vittatum (F.), are the most important diabroticite pests of vegetable crops in the southeastern United States (McKinlay 1992, Capinera 2001. The spotted and banded cucumber beetles each have a wide host range (Arant 1929, Isley 1929, Saba 1970, including cucurbits (Cucurbitaceae) and sweetpotatoes, Ipomoea batatas Lam (L.) (Convolvulaceae). However, larvae of the striped cucumber beetle are found primarily on cucurbits (Houser and Balduf 1925).…”

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confidence: 99%

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Monitoring Cucumber Beetles in Sweetpotato and Cucurbits with Kairomone-Baited Traps

Jackson

Sorensen

Sorenson

et al. 2005

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“…Banded cucumber beetles (Saba 1970) were reared in an incubator at 25 °C and a 14 : 10 h light : dark cycle. They were fed lima bean leaves and sweet potatoes.…”

Section: Herbivoresmentioning

confidence: 99%

The Effects of Silica Fertilizer as an Anti-Herbivore Defense in Cucumber

Callis‐Duehl

McAuslane

Duehl

et al. 2017

Journal of Horticultural Research

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This study aims to improve our understanding of silicon's role in deterring herbivores from Cucumis sativa. We hypothesized that silicon's role in plant defense is due to the presence of silica augmenting other physical and/or chemical defenses used by the plant. Using C. sativa plants treated with either a silica fertilizer treatment (Si+) or a control solution (Si-), we monitored feeding preferences of two types of herbivores, a chewing herbivore (Diabrotica balteata) and a piercing/sucking herbivore (Bemisia tabaci). Leaves from treatment plants were visited less and eaten less than leaves from control plants. We then assessed the differences in physical defenses by comparing the leaf structural components, nutrient and water content, and trichome density between treatment and control plants. For chemical plant defenses, we measured leaf carbon and nitrogen levels in, and volatile organic compounds (VOCs) from treatment and control plants. We found no significant difference between treatment and control plants in: lignin content, most elemental plant nutrients, water content, trichome density, and quantity of carbon and nitrogen. We did see an increase in the VOC Indole, known for plant defense priming, an increase in phosphorous levels and a decrease in cellulose levels in silica treated plants.

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HOST PLANT SPECTRUM AND TEMPERATURE LIMITATIONS OF DIABROTICA BALTEATA

Cited by 29 publications

References 3 publications

Selinene Volatiles Are Essential Precursors for Maize Defense Promoting Fungal Pathogen Resistance

Selinene Volatiles Are Essential Precursors for Maize Defense Promoting Fungal Pathogen Resistance

Monitoring Cucumber Beetles in Sweetpotato and Cucurbits with Kairomone-Baited Traps

The Effects of Silica Fertilizer as an Anti-Herbivore Defense in Cucumber

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