Bioassay‐guided isolation of potent aphicidal Erythrina alkaloids against <scp>Aphis gossypii</scp> from the seed of <scp>Erythrina crista‐galli</scp> L

Wang, Delong; Xie, Na; Yi, Shandong; Liu, Chuanyuan; Jiang, Hui; Ma, Zhiqing; Feng, Juntao; Yan, Hongli; Xing, Zhang

doi:10.1002/ps.4698

Cited by 26 publications

(10 citation statements)

References 62 publications

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“…This method integrates the process of separation of bio-active compounds by fractionation methods (e.g., liquid or gas chromatography) with results obtained from biological testing, e.g., thrips performance. In Eurythrina crista-galli this method was successfully applied to identify botanical insecticides for cotton aphids ( Aphis gossypii ) (Wang et al, 2018). In addition, this method allowed the identification of a novel unsaturated isobutylamide, providing resistance to F. occidentalis in Chrysanthemum (Tsao et al, 2005).…”

Section: Discussionmentioning

confidence: 99%

Thrips Resistance Screening Is Coming of Age: Leaf Position and Ontogeny Are Important Determinants of Leaf-Based Resistance in Pepper

et al. 2019

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Capsicum is a genus containing important crop species, many of which severely suffer from thrips infestation. Thrips feeding damages leaves and fruits, and often results in virus infections. Only a few insecticides are still effective against thrips, underlining the importance of finding natural resistance in crops. Capsicum is a perennial plant which is usually cultivated for several months, during which time the fruits are harvested. From the young vegetative stage to the mature fruit bearing stage, the plants are at risk to thrips infestation. Constitutive resistance to thrips over the entire ontogenetic development is therefore a key trait for a more sustainable and successful cultivation of the hot and sweet pepper. In addition to ontogeny, leaf position can affect the level of thrips resistance. Pest resistance levels are known to differ between young and old leaves. To our knowledge, no studies have explicitly considered ontogeny and leaf position when screening for constitutive resistance to thrips in Capsicum . In this study we analyze whether ontogeny and leaf position affect leaf-based resistance to Frankliniella occidentalis and Thrips tabaci , in 40 Capsicum accessions, comprising five different species. Our results show that resistance to both thrips species in Capsicum varies with ontogenetic stage. This variation in resistance among ontogenetic stages was not consistent among the accessions. However, accessions with constitutive resistance in both the flowering and fruit ripening stage could be identified. In addition, we found that thrips resistance is overall similar at different leaf positions within the ontogenetic stage. This implies that resistance mechanisms, such as defense compounds, are constitutively present at sufficient levels on all leaf positions. Finally, we found that resistance to F. occidentalis and resistance to T. tabaci were not correlated. This indicates that leaf-based resistance in Capsicum is thrips species-specific. Because of the variation in resistance over ontogeny, identifying Capsicum accessions with resistance over their entire lifespan is challenging. For resistance screening, accounting for leaf position may be less of a concern. To identify the defense mechanisms responsible for thrips resistance, it is important to further analyze and compare resistant and susceptible accessions.

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Section: Discussionmentioning

confidence: 99%

Thrips Resistance Screening Is Coming of Age: Leaf Position and Ontogeny Are Important Determinants of Leaf-Based Resistance in Pepper

et al. 2019

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“…The experiment was conducted according to the methods described by Wang et al . with few modifications.…”

Section: Methodsmentioning

confidence: 99%

“…The experiment was conducted according to the methods described by Wang et al 27 with few modifications. Dried roots of C. chinensis (200 g) were crushed and ultrasonically extracted three times with 95% ethanol at 50 ∘ C (30 min each time) to obtain crude extracts (54.2 g).…”

Section: Preparation Of Crude Extracts Alkaloids and Non-alkaloidsmentioning

confidence: 99%

Berberine induces resistance against tobacco mosaic virus in tobacco

Guo

Yan

Ren

et al. 2020

Pest Management Science

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BACKGROUND Plant systemic resistance induced by botanical compounds is a promising alternative method of disease management. The natural product berberine, usually used as an antimicrobial in medicine, has been proven to have antifungal activity in agriculture. To investigate the induced resistance imparted by berberine, the effect of berberine against tobacco mosaic virus (TMV) and the mechanism governing this effect were determined. RESULT Berberine exhibited considerable in vivo anti‐TMV activity of up to 68.3% but had no in vitro direct effect on TMV. Moreover, berberine could induce immune responses against TMV in tobacco, including the hypersensitive reaction (HR), accumulation of H2O2, increases in defense enzymes and overexpression of pathogenesis‐related (PR) proteins. In addition, upregulation of salicylic acid (SA) biosynthesis genes PAL, CM1, ICS, PBS3 and the enzyme benzoic acid 2‐hydroxylase (BA2H) confirmed that SA was involved in the defensive signals. Berberine can induce crop resistance against TMV, Phytophthora nicotianae, Botrytis cinerea and Blumeria graminis in the greenhouse. CONCLUSION This paper highlights the use of berberine in manipulating tobacco to generate defense responses against TMV, which can be attributed to SA‐mediated induced resistance. The paper provides a theoretical basis for the application of berberine as a resistance activator and for further research on induced resistance by botanical natural product. © 2019 Society of Chemical Industry

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“…Moreover, the Erythrina alkaloid erythraline ( 64 , Figure 9D) can be used as a plant acaricide for commercial purposes or as a template to develop new insecticides 94 . A new lycorine derivative ( 65 ) was found in the aerial parts and bulbs of Lycoris traubii and evaluated for antitrypanosomal and antimalarial activities 95 .…”

Section: Bioactivities Of Indolizidine Alkaloidsmentioning

confidence: 99%

Biologically active indolizidine alkaloids

Zhang

Morris‐Natschke

et al. 2020

Medicinal Research Reviews

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Indolizidine alkaloids are chemical constituents isolated from various marine and terrestrial plants and animals, including but not limited to trees, fungi, ants, and frogs, with a myriad of important biological activities. In this review, we discuss the biological activity and pharmacological effects of indolizidine alkaloids and offer new avenues toward the discovery of new and better drugs based on these naturally occurring compounds.

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Bioassay‐guided isolation of potent aphicidal Erythrina alkaloids against Aphis gossypii from the seed of Erythrina crista‐galli L

Cited by 26 publications

References 62 publications

Thrips Resistance Screening Is Coming of Age: Leaf Position and Ontogeny Are Important Determinants of Leaf-Based Resistance in Pepper

Thrips Resistance Screening Is Coming of Age: Leaf Position and Ontogeny Are Important Determinants of Leaf-Based Resistance in Pepper

Berberine induces resistance against tobacco mosaic virus in tobacco

Biologically active indolizidine alkaloids

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