Tuber production, dormancy and resistance against <i>Phthorimaea operculella</i> (Zeller) in wild potato species

Horgan, Finbarr G.; Quiring, Dan T.; Lagnaoui, Aziz; Pelletier, Yvan

doi:10.1111/jen.12055

Cited by 13 publications

(4 citation statements)

References 12 publications

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“…Ecological costs to the host plant of strong resistance can be manifested in many ways. Principally these will include reductions in growth, reproduction or maintenance – including reduced tolerance to biotic and abiotic stresses ( Herms and Mattson, 1992 ; Brown, 2002 ; Horgan et al, 2013 ). In rice, potential trade-offs between defence and reproductive output (grain yield) is a key consideration for the success of resistance breeding.…”

Section: Discussionmentioning

confidence: 99%

Unanticipated benefits and potential ecological costs associated with pyramiding leafhopper resistance loci in rice

Horgan

Almazan

Quan³

et al. 2019

Crop Protection

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We tested the hypotheses that increasing the number of anti-herbivore resistance loci in crop plants will increase resistance strength, increase the spectrum of resistance (the number of species affected), and increase resistance stability. We further examined the potential ecological costs of pyramiding resistance under benign environments. In our experiments, we used 14 near-isogenic rice lines with zero (T65: recurrent parent), one, two or three resistance loci introgressed through marker-assisted selection. Lines with two or more loci that were originally bred for resistance to the green rice leafhopper, Nephotettix cincticeps, significantly reduced egg-laying by the green leafhopper, N. virescens. Declines in egg-number and in nymph weight were correlated with the numbers of resistance loci in the rice lines. To test the spectrum of resistance, we challenged the lines with a range of phloem feeders including the zig-zag leafhopper, Recilia dorsalis, brown planthopper, Nilaparvata lugens, and whitebacked planthopper, Sogatella furcifera. There was an increase in the number of tested species showing significant declines in egg-laying and nymph survival on lines with increasing numbers of loci. In a screen house trial that varied rates of nitrogenous fertilizer, a line with three loci had stable resistance against the green leafhopper and the grain yields of infested plants were maintained or increased (overcompensation). Under benign conditions, plant growth and grain yields declined with increasing numbers of resistance loci. However, under field conditions with natural exposure to herbivores, there were no significant differences in final yields. Our results clearly indicate the benefits, including unanticipated benefits such as providing resistance against multiple herbivore species, of pyramiding anti-herbivore resistance genes/loci in crop plants. We discuss our results as part of a review of existing research on pyramided resistance against leafhoppers and planthoppers in rice. We suggest that potential ecological costs may be overcome by the careful selection of gene combinations for pyramiding, avoidance of high (potentially redundant) loci numbers, and introgression of loci into robust plant types such as hybrid rice varieties.

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Section: Discussionmentioning

confidence: 99%

Unanticipated benefits and potential ecological costs associated with pyramiding leafhopper resistance loci in rice

Horgan

Almazan

Quan³

et al. 2019

Crop Protection

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“…Currently, abundant evidences in other insectplant interactions systems exist, especially the defensive chemical compounds. In contrast, the amount of information to improve potato genotypes against P. operculella is still lacking [225]. Cultivated potatoes have more than 100 tuber-bearing relatives native to the Andes of southern Peru; among them, Solanum chiquidenum L. and Solanum sandemanii L. for instance, which are highly resistant to P. operculella, damage in tubers [226].…”

Section: Resistance: Plant Versus Insect Resistance?mentioning

confidence: 99%

The Journey of the Potato Tuberworm Around the World

Rondon¹,

Gao²

2018

Moths - Pests of Potato, Maize and Sugar Beet

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Potato (Solanum tuberosum L.) production is challenged by many factors including pests and diseases. Among insect pests, Phthorimaea operculella Zeller (Lepidoptera: Gelechiidae), known as the potato tuber worm or potato tuber moth, is considered one of the most important potato pests worldwide. Phthorimaea operculella is a cosmopolitan pest of solanaceous crops including potato, tomato (Solanum lycopersicum L.), and other important row crops. Adults oviposit in leaves, stems, and tubers; immature stage mines leaves causing foliar damage, but most importantly, burrows into tubers rendering them unmarketable. Currently, pest management practices are effective in controlling P. operculella, but the effectiveness depends on many factors that will be discussed later in this chapter. Each section includes up-to-date information related to P. operculella biology, ecology, and control, including origins, host range, life cycle, distribution, seasonal dynamics, and control methods.

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“…Here, we investigate how prior above-and belowground herbivory (i.e., leaf herbivory and tuber herbivory) by the potato tuberworm, Phthorimaea operculella (Zeller) (Lepidoptera: Gelechiidae) and AMF symbiosis interactively affect the performance of subsequent above-and belowground conspeci c larvae in a tuberplant, potato (Solanum tuberosum). The potato tuberworm is a worldwide pest of Solanaceous crops, which causes serious losses to potato production by mining leaves and tubers (Rondon 2010;Horgan et al 2013). Potato is the fourth largest food crop in the world and contains a series of primary metabolites (starch, protein and carbohydrate) and secondary metabolites (phenolics, α-solanine and α-chaconine) in leaves and tubers.…”

Section: Introductionmentioning

confidence: 99%

Arbuscular mycorrhizal fungi and belowground herbivores interact to determine plant productivity and performance of subsequently feeding conspecifics by changing plant metabolites

Wang,

Pan,

Biere

et al. 2023

J Pest Sci

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Insect herbivores and arbuscular mycorrhizal fungi (AMF) often occur simultaneously on a host plant, altering plant morphological and biochemical traits and thereby not only affecting each other's performance, but also plant interactions with subsequent above-or belowground herbivores. Here, we investigate the combined effects of AMF and above-and belowground herbivory on plant productivity and performance of subsequent above-and belowground herbivores. We conducted a 3×2 full-factorial experiment with three factors of 'Herbivory (no herbivory, leaf herbivory, and tuber herbivory) and two factors of 'AMF inoculation' (no AMF inoculation and AMF inoculation) in the tuber-plant, potato (Solanum tuberosum). We showed that both AMF and tuber herbivory increased tuber biomass and tuber primary metabolites (protein, starch). Tuber herbivory reduced the performance of subsequent conspeci cs feeding on leaves potentially via increased leaf levels of phenolics, α-solanine and αchaconine. By contrast, it increased the performance of subsequent conspeci cs feeding on tubers potentially via increased protein, however, only in plants inoculated with AMF. This indicates that the belowground facilitation among conspeci c insects was contingent upon the presence of AMF. Leaf herbivory did not affect subsequent above-or belowground insect performance. These feedings improve our understanding of the ecological consequences of antagonists and mutualists interactions mediated by phytochemistry, especially for agroecosystems. Key MessageAMF and tuber herbivory increased potato tuber biomass, and concentrations of tuber primary metabolites.Tuber herbivory reduced the performance of subsequent conspeci cs feeding on leaves both in plants with and without AMF.Tuber herbivory only enhanced the performance of subsequent conspeci cs feeding on tubers in the presence of AMF, indicating that the presence of AMF was essential for this belowground facilitation.Such facilitation and inhibition potentially depend on increased levels of tuber protein and leaf phenolics, α-solanine and α-chaconine.

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Tuber production, dormancy and resistance against Phthorimaea operculella (Zeller) in wild potato species

Cited by 13 publications

References 12 publications

Unanticipated benefits and potential ecological costs associated with pyramiding leafhopper resistance loci in rice

Unanticipated benefits and potential ecological costs associated with pyramiding leafhopper resistance loci in rice

The Journey of the Potato Tuberworm Around the World

Arbuscular mycorrhizal fungi and belowground herbivores interact to determine plant productivity and performance of subsequently feeding conspecifics by changing plant metabolites

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