Plant Defense against Pests

A special issue of Plants (ISSN 2223-7747). This special issue belongs to the section "Plant Protection and Biotic Interactions".

Deadline for manuscript submissions: closed (30 September 2020) | Viewed by 5626

Special Issue Editors


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Guest Editor
Department of Plant Biology and Soil Sciences, University of Vigo, 36310 Vigo, Spain
Interests: phytochemistry; genetics; analytical chemistry; agricultural plant science; food science; entomology; plant protection; chemical defense

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Guest Editor
Department of Maize Breeding, Misión Biológica de Galicia, Spanish Council of Scientific Research, 36143 Pontevedra, Spain
Interests: plant genetics; plant breeding; agronomy; maize pest resistance; fungal diseases

Special Issue Information

Dear Colleagues,

Pest control has been carried out using diverse approaches, such as insecticides, cultural practices, biological agents, or resistant cultivars based on monogenic or polygenic resistances. On the other hand, host–plant resistance describes a range of adaptations in plants which improve their survival and reproduction by reducing the impact of damage by herbivores. In this sense, the study of plant defenses against herbivory is a useful tool in pest control programs due to the direct impact that these defenses have on agriculture, including human and livestock food sources.

Among herbivorous insects, borers can be found worldwide across several unrelated groups of insects, damaging plants by destroying internal plant tissue as they feed and mature. Typically, this includes moths (Lepidoptera), wasps (Hymenoptera), and beetles (Coleoptera).

For this Special Issue, review and research papers are invited from scientists working on diverse aspects of plant defense against herbivory, with special attention but not limited to borer damages. Topics include constitutive and induction mechanisms of defense (perception, signaling, metabolic pathways, secondary metabolites, and enzymatic strategies). Contributions from breeders in crop species and advances in genetically selected materials are also welcome.

Dr. Rogelio Santiago
Dr. Ana Butrón
Guest Editors

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Keywords

  • herbivore defense
  • plant biochemistry
  • crop protection
  • host–plant resistance
  • secondary metabolism
  • defense response
  • crop breeding
  • borer

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Published Papers (2 papers)

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Research

15 pages, 3343 KiB  
Article
Overexpression of a Cytosolic 6-Phosphogluconate Dehydrogenase Gene Enhances the Resistance of Rice to Nilaparvata lugens
by Lin Chen, Peng Kuai, Miaofen Ye, Shuxing Zhou, Jing Lu and Yonggen Lou
Plants 2020, 9(11), 1529; https://doi.org/10.3390/plants9111529 - 10 Nov 2020
Cited by 7 | Viewed by 2345
Abstract
The pentose phosphate pathway (PPP) plays an important role in plant growth and development, and plant responses to biotic and abiotic stresses. Yet, whether the PPP regulates plant defenses against herbivorous insects remains unclear. In this study, we cloned a rice cytosolic 6-phosphogluconate [...] Read more.
The pentose phosphate pathway (PPP) plays an important role in plant growth and development, and plant responses to biotic and abiotic stresses. Yet, whether the PPP regulates plant defenses against herbivorous insects remains unclear. In this study, we cloned a rice cytosolic 6-phosphogluconate dehydrogenase gene, Os6PGDH1, which encodes the key enzyme catalyzing the third step in the reaction involving the oxidative phase of the PPP, and explored its role in rice defenses induced by brown planthopper (BPH) Nilaparvata lugens. Levels of Os6PGDH1 transcripts were detected in all five examined tissues, with the highest in outer leaf sheaths and lowest in inner leaf sheaths. Os6PGDH1 expression was strongly induced by mechanical wounding, infestation of gravid BPH females, and jasmonic acid (JA) treatment. Overexpressing Os6PGDH1 (oe6PGDH) decreased the height of rice plants and the mass of the aboveground part of plants, but slightly increased the length of plant roots. In addition, the overexpression of Os6PGDH1 enhanced levels of BPH-induced JA, jasmonoyl-isoleucine (JA-Ile), and H2O2, but decreased BPH-induced levels of ethylene. Bioassays revealed that gravid BPH females preferred to feed and lay eggs on wild-type (WT) plants over oe6PGDH plants; moreover, the hatching rate of BPH eggs raised on oe6PGDH plants and the fecundity of BPH females fed on these were significantly lower than the eggs and the females raised and fed on WT plants. Taken together, these results indicate that Os6PGDH1 plays a pivotal role not only in rice growth but also in the resistance of rice to BPH by modulating JA, ethylene, and H2O2 pathways. Full article
(This article belongs to the Special Issue Plant Defense against Pests)
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16 pages, 1722 KiB  
Article
Genome-Wide Analysis Reveals Transcription Factors Regulated by Spider-Mite Feeding in Cucumber (Cucumis sativus)
by Jun He, Harro J. Bouwmeester, Marcel Dicke and Iris F. Kappers
Plants 2020, 9(8), 1014; https://doi.org/10.3390/plants9081014 - 11 Aug 2020
Cited by 4 | Viewed by 2754
Abstract
To gain insight into the regulatory networks that underlie the induced defense in cucumber against spider mites, genes encoding transcription factors (TFs) were identified in the cucumber (Cucumissativus) genome and their regulation by two-spotted spider mite (Tetranychusurticae) [...] Read more.
To gain insight into the regulatory networks that underlie the induced defense in cucumber against spider mites, genes encoding transcription factors (TFs) were identified in the cucumber (Cucumissativus) genome and their regulation by two-spotted spider mite (Tetranychusurticae) herbivory was analyzed using RNA-seq. Of the total 1212 annotated TF genes in the cucumber genome, 119 were differentially regulated upon spider-mite herbivory during a period of 3 days. These TF genes belong to different categories but the MYB, bHLH, AP2/ERF and WRKY families had the highest relative numbers of differentially expressed genes. Correlation analysis of the expression of TF genes with defense-associated genes during herbivory and pathogen infestation, and in different organs resulted in the putative identification of regulators of herbivore-induced terpenoid and green-leaf-volatile biosynthesis. Analysis of the cis-acting regulatory elements (CAREs) present in the promoter regions of the genes responsive to spider-mite feeding revealed potential TF regulators. This study describes the TF genes in cucumber that are potentially involved in the regulation of induced defense against herbivory by spider mites. Full article
(This article belongs to the Special Issue Plant Defense against Pests)
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