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Fezza E, Roberts JM, Bruce TJA, Walsh LE, Gaffney MT, Pope TW. 'The Garlic Gambit': an alternative strategy for controlling vine weevil (Otiorhynchus sulcatus F.; Coleoptera: Curculionidae). JOURNAL OF ECONOMIC ENTOMOLOGY 2024:toae175. [PMID: 39121383 DOI: 10.1093/jee/toae175] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/07/2024] [Revised: 06/26/2024] [Accepted: 07/17/2024] [Indexed: 08/11/2024]
Abstract
Plant protection products derived from plant material are proposed to be a sustainable alternative to conventional synthetic chemical pesticides. This study determines the efficacy of a commercially available bioinsecticide based on garlic (Allium sativum L.; Asparagales: Amaryllidaceae) extract against vine weevil (Otiorhynchus sulcatus F.; Coleoptera: Curculionidae) eggs and larvae in contact, fumigation and a combination of contact and fumigation bioassays under laboratory conditions. Results showed that garlic significantly reduced egg hatch rate compared to the control group when applied as a fumigant. Similarly, the egg hatch rate was reduced compared to the control group when garlic was applied as combined contact and fumigant applications. No effect was observed when the garlic product was applied as a contact application. The bioinsecticide significantly reduced larval survival when either contact or fumigant applications were used. A combined contact and fumigant effect was shown also when vine weevil eggs were exposed to the bioinsecticide for 30 days in plastic containers containing growing media. The number of larvae recovered after this period was significantly reduced compared to the control group. This study demonstrates the potential of garlic-based bioinsecticides, such as Pitcher GR, for vine weevil control. Further studies are, however, needed to determine the efficacy of such bioinsecticides under field conditions and investigate how these products can be most effectively used as a part of a wider vine weevil integrated pest management program.
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Affiliation(s)
- Eugenia Fezza
- Entomology Group, Centre for Crop and Environmental Science, Harper Adams University, Newport, UK
- Horticulture Development Department, Teagasc, Ashtown Research Centre, Dublin, Ireland
| | - Joe M Roberts
- Entomology Group, Centre for Crop and Environmental Science, Harper Adams University, Newport, UK
| | - Toby J A Bruce
- Centre for Applied Entomology and Parasitology, School of Life Sciences, Huxley Building, Keele University, Staffordshire, UK
| | - Lael E Walsh
- Horticulture Development Department, Teagasc, Ashtown Research Centre, Dublin, Ireland
| | - Michael T Gaffney
- Horticulture Development Department, Teagasc, Ashtown Research Centre, Dublin, Ireland
| | - Tom W Pope
- Entomology Group, Centre for Crop and Environmental Science, Harper Adams University, Newport, UK
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2
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Simard A, Gendjar M, Merewitz E, McGraw BA. Inducible defense phytohormones in annual bluegrass (Poa annua) and creeping bentgrass (Agrostis stolonifera) in response to annual bluegrass weevil (Listronotus maculicollis) infestation. JOURNAL OF ECONOMIC ENTOMOLOGY 2024:toae153. [PMID: 38981132 DOI: 10.1093/jee/toae153] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/15/2023] [Revised: 06/02/2024] [Accepted: 06/23/2024] [Indexed: 07/11/2024]
Abstract
The annual bluegrass weevil (Listronotus maculicollis) is the most damaging insect pest of short-mown turfgrass on golf courses in eastern North America. Listronotus maculicollis larvae cause limited visible damage as stem-borers (L1-3), compared to the crown-feeding (L4-5) developmental instars. Prolonged larval feeding results in discoloration and formation of irregular patches of dead turf, exposing soil on high-value playing surfaces (fairways, collars, tee boxes, and putting greens). Annual bluegrass (Poa annua) is highly susceptible to L. maculicollis compared to a tolerant alternate host plant, creeping bentgrass (Agrostis stolonifera). This study explored whether defense signaling phytohormones contribute to A. stolonifera tolerance in response to L. maculicollis. Concentrations (ng/g) of salicylic acid (SA), jasmonic acid (JA), jasmonic-isoleucine (JA-Ile), 12-oxophytodienoic acid (OPDA), and abscisic acid (ABA) were extracted from turfgrass (leaf, stem, and root) tissue samples as mean larval age reached 2nd (L2), 3rd (L3), and 4th (L4) instar. Poa annua infested with L. maculicollis larvae (L2-4) possessed significantly greater SA in above-ground tissues than A. stolonifera. Levels of constitutive JA, JA-Ile, OPDA, and ABA were significantly higher within non-infested A. stolonifera aboveground tissues compared to P. annua. Inducible defense phytohormones may play a role in P. annua susceptibility to L. maculicollis but are unlikely to provide tolerance in A. stolonifera. Additional studies in turfgrass breeding, particularly focusing on cultivar selection for increased constitutive JA content, could provide a non-chemical alternative management strategy for L. maculicollis for turfgrass managers.
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Affiliation(s)
- Audrey Simard
- Department of Entomology, Pennsylvania State University, University Park, PA, USA
| | - Megan Gendjar
- Department of Plant Soil and Microbial Science, Michigan State University, East Lansing, MI, USA
| | - Emily Merewitz
- Department of Plant Soil and Microbial Science, Michigan State University, East Lansing, MI, USA
| | - Benjamin A McGraw
- Department of Entomology, Pennsylvania State University, University Park, PA, USA
- Department of Plant Science, Pennsylvania State University, University Park, PA, USA
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Vasquez A, Balakrishnan D, Ayala J, Loftin K, Louis J, Kariyat R. Brown midrib (BMR) and plant age impact fall armyworm (Spodoptera frugiperda) growth and development in sorghum-sudangrass (Sorghum x drummondii). Sci Rep 2024; 14:12649. [PMID: 38825611 PMCID: PMC11144704 DOI: 10.1038/s41598-024-63397-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/21/2024] [Accepted: 05/28/2024] [Indexed: 06/04/2024] Open
Abstract
Economic losses from insect herbivory in agroecosystems has driven the development of integrated pest management strategies that reduce pest incidence and damage; however, traditional chemicals-based control is either being complemented or substituted with sustainable and integrated methods. Major sustainable pest management strategies revolve around improving host plant resistance, and one of these traits of interest is Brown midrib (BMR). Originally developed to increase nutritional value and ease of digestion for animal agriculture, BMR is a recessive plant gene usually found in annual grasses, including sorghum and sorghum-sudangrass hybrids. In sorghum-sudangrass, BMR expressed plants have lower amounts of lignin, which produces a less fibrous, more digestible crop, with possible implications for plant defense against herbivores- an area currently unexplored. Fall Armyworm (FAW; Spodoptera frugiperda) is a ruinous pest posing immense threat for sorghum producers by severely defoliating crops and being present in every plant stage. Using FAW, we tested the effect of seed treatment, BMR, and plant age on FAW growth, development, and plant defense responses in sorghum-sudangrass. Our results show that seed treatment did not affect growth or development, or herbivory. However, presence of BMR significantly reduced pupal mass relative to its non-BMR counterpart, alongside a significant reduction in adult mass. We also found that plant age was a major factor as FAW gained significantly less mass, had longer pupation times, and had lower pupal mass on the oldest plant stage explored, 60-days, compared to younger plants. These findings collectively show that pest management strategies should consider plant age, and that the effects of BMR on plant defenses should also be studied.
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Affiliation(s)
- Alejandro Vasquez
- Department of Entomology and Plant Pathology, University of Arkansas, Fayetteville, AR, 72701, USA
| | - Devi Balakrishnan
- Department of Entomology and Plant Pathology, University of Arkansas, Fayetteville, AR, 72701, USA
| | - Jessica Ayala
- Department of Entomology and Plant Pathology, University of Arkansas, Fayetteville, AR, 72701, USA
| | - Kelly Loftin
- Department of Entomology and Plant Pathology, University of Arkansas, Fayetteville, AR, 72701, USA
| | - Joe Louis
- Department of Entomology, University of Nebraska-Lincoln, Lincoln, NE, USA
- Department of Biochemistry, University of Nebraska-Lincoln, Lincoln, NE, USA
| | - Rupesh Kariyat
- Department of Entomology and Plant Pathology, University of Arkansas, Fayetteville, AR, 72701, USA.
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Zhang SP, Bai B, Chen GM, Wang YQ, Hu C, Liu XF, Gao P, Li YT, Fu NX, Yang XQ. Secondary metabolites in host pears defense against two fruit borers and cytochrome-P450-mediated counter-defense. iScience 2024; 27:109518. [PMID: 38585662 PMCID: PMC10995863 DOI: 10.1016/j.isci.2024.109518] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/11/2023] [Revised: 01/15/2024] [Accepted: 03/14/2024] [Indexed: 04/09/2024] Open
Abstract
Herbivorous insects have evolved metabolic strategies to survive the challenges posed by plant secondary metabolites (SMs). This study reports an exploration of SMs present in pears, which serve as a defense against invasive Cydia pomonella and native Grapholita molesta and their counter-defense response. The feeding preferences of fruit borers are influenced by the softening of two pear varieties as they ripen. The content of SMs, such as quercetin and rutin, increases due to feeding by fruit borers. Notably, quercetin levels only increase after C. pomonella feeding. The consumption of SMs affects the growth of fruit borer population differently, potentially due to the activation of P450 genes by SMs. These two fruit borers are equipped with specific P450 enzymes that specialize in metabolizing quercetin and rutin, enabling them to adapt to these SMs in their host fruits. These findings provide valuable insights into the coevolution of plants and herbivorous insects.
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Affiliation(s)
- Shi-Pan Zhang
- College of Plant Protection, Shenyang Agricultural University, Shenyang, Liaoning 110866, China
- Key Laboratory of Economical and Applied Entomology of Liaoning Province, Shenyang, Liaoning 110866, China
- Key Laboratory of Major Agricultural Invasion Biological Monitoring and Control, Shenyang, Liaoning 110866, China
| | - Bing Bai
- College of Plant Protection, Shenyang Agricultural University, Shenyang, Liaoning 110866, China
- Key Laboratory of Economical and Applied Entomology of Liaoning Province, Shenyang, Liaoning 110866, China
- Key Laboratory of Major Agricultural Invasion Biological Monitoring and Control, Shenyang, Liaoning 110866, China
| | - Gao-Man Chen
- College of Plant Protection, Shenyang Agricultural University, Shenyang, Liaoning 110866, China
- Key Laboratory of Economical and Applied Entomology of Liaoning Province, Shenyang, Liaoning 110866, China
- Key Laboratory of Major Agricultural Invasion Biological Monitoring and Control, Shenyang, Liaoning 110866, China
| | - Ya-Qi Wang
- College of Plant Protection, Shenyang Agricultural University, Shenyang, Liaoning 110866, China
- Key Laboratory of Economical and Applied Entomology of Liaoning Province, Shenyang, Liaoning 110866, China
- Key Laboratory of Major Agricultural Invasion Biological Monitoring and Control, Shenyang, Liaoning 110866, China
| | - Chao Hu
- College of Plant Protection, Shenyang Agricultural University, Shenyang, Liaoning 110866, China
- Key Laboratory of Economical and Applied Entomology of Liaoning Province, Shenyang, Liaoning 110866, China
- Key Laboratory of Major Agricultural Invasion Biological Monitoring and Control, Shenyang, Liaoning 110866, China
| | - Xu-Fei Liu
- College of Plant Protection, Shenyang Agricultural University, Shenyang, Liaoning 110866, China
- Key Laboratory of Economical and Applied Entomology of Liaoning Province, Shenyang, Liaoning 110866, China
- Key Laboratory of Major Agricultural Invasion Biological Monitoring and Control, Shenyang, Liaoning 110866, China
| | - Ping Gao
- College of Plant Protection, Shenyang Agricultural University, Shenyang, Liaoning 110866, China
- Key Laboratory of Economical and Applied Entomology of Liaoning Province, Shenyang, Liaoning 110866, China
- Key Laboratory of Major Agricultural Invasion Biological Monitoring and Control, Shenyang, Liaoning 110866, China
| | - Yu-Ting Li
- College of Plant Protection, Shenyang Agricultural University, Shenyang, Liaoning 110866, China
- Key Laboratory of Economical and Applied Entomology of Liaoning Province, Shenyang, Liaoning 110866, China
- Key Laboratory of Major Agricultural Invasion Biological Monitoring and Control, Shenyang, Liaoning 110866, China
| | - Nan-Xia Fu
- Tea Research Institute, Chinese Academy of Agricultural Sciences, Hangzhou 310008, China
| | - Xue-Qing Yang
- College of Plant Protection, Shenyang Agricultural University, Shenyang, Liaoning 110866, China
- Key Laboratory of Economical and Applied Entomology of Liaoning Province, Shenyang, Liaoning 110866, China
- Key Laboratory of Major Agricultural Invasion Biological Monitoring and Control, Shenyang, Liaoning 110866, China
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Li TP, Wang CH, Xie JC, Wang MK, Chen J, Zhu YX, Hao DJ, Hong XY. Microbial changes and associated metabolic responses modify host plant adaptation in Stephanitis nashi. INSECT SCIENCE 2024. [PMID: 38369568 DOI: 10.1111/1744-7917.13340] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/08/2023] [Revised: 01/13/2024] [Accepted: 01/16/2024] [Indexed: 02/20/2024]
Abstract
Symbiotic microorganisms are essential for the physiological processes of herbivorous pests, including the pear lace bug Stephanitis nashi, which is known for causing extensive damage to garden plants and fruit trees due to its exceptional adaptability to diverse host plants. However, the specific functional effects of the microbiome on the adaptation of S. nashi to its host plants remains unclear. Here, we identified significant microbial changes in S. nashi on 2 different host plants, crabapple and cherry blossom, characterized by the differences in fungal diversity as well as bacterial and fungal community structures, with abundant correlations between bacteria or fungi. Consistent with the microbiome changes, S. nashi that fed on cherry blossom demonstrated decreased metabolites and downregulated key metabolic pathways, such as the arginine and mitogen-activated protein kinase signaling pathway, which were crucial for host plant adaptation. Furthermore, correlation analysis unveiled numerous correlations between differential microorganisms and differential metabolites, which were influenced by the interactions between bacteria or fungi. These differential bacteria, fungi, and associated metabolites may modify the key metabolic pathways in S. nashi, aiding its adaptation to different host plants. These results provide valuable insights into the alteration in microbiome and function of S. nashi adapted to different host plants, contributing to a better understanding of pest invasion and dispersal from a microbial perspective.
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Affiliation(s)
- Tong-Pu Li
- Co-Innovation Center for Sustainable Forestry in Southern China, College of Forestry, Nanjing Forestry University, Nanjing, Jiangsu, China
| | - Chen-Hao Wang
- Co-Innovation Center for Sustainable Forestry in Southern China, College of Forestry, Nanjing Forestry University, Nanjing, Jiangsu, China
| | - Jia-Chu Xie
- Co-Innovation Center for Sustainable Forestry in Southern China, College of Forestry, Nanjing Forestry University, Nanjing, Jiangsu, China
| | - Meng-Ke Wang
- Department of Entomology, Nanjing Agricultural University, Nanjing, Jiangsu, China
| | - Jie Chen
- Department of Entomology, Nanjing Agricultural University, Nanjing, Jiangsu, China
| | - Yu-Xi Zhu
- Department of Entomology, College of Plant Protection, Yangzhou University, Yangzhou, Jiangsu, China
| | - De-Jun Hao
- Co-Innovation Center for Sustainable Forestry in Southern China, College of Forestry, Nanjing Forestry University, Nanjing, Jiangsu, China
| | - Xiao-Yue Hong
- Department of Entomology, Nanjing Agricultural University, Nanjing, Jiangsu, China
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6
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Baum M, Dobler S. Fecal Deployment: An Alternative Way of Defensive Host Plant Cardenolide Use by Lilioceris merdigera Larvae. J Chem Ecol 2024; 50:63-70. [PMID: 38062246 PMCID: PMC10991028 DOI: 10.1007/s10886-023-01465-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2023] [Revised: 11/26/2023] [Accepted: 11/28/2023] [Indexed: 04/04/2024]
Abstract
The brilliant red Lilioceris merdigera (Coleoptera, Chrysomelidae) can spend its entire life cycle on the cardenolide-containing plant Convallaria majalis (lily of the valley) and forms stable populations on this host. Yet, in contrast to many other insects on cardenolide-containing plants L. merdigera does not sequester these plant toxins in the body but rather both adult beetles and larvae eliminate ingested cardenolides with the feces. Tracer feeding experiments showed that this holds true for radioactively labeled ouabain and digoxin, a highly polar and a rather apolar cardenolide. Both compounds or their derivatives are incorporated in the fecal shields of the larvae. The apolar digoxin, but not the polar ouabain, showed a deterrent effect on the generalist predatory ant Myrmica rubra, which occurs in the habitat of L. merdigera. The deterrent effect was detected for digoxin both in choice and feeding time assays. In a predator choice assay, a fecal shield derived from a diet of cardenolide-containing C. majalis offered L. merdigera larvae better protection from M. rubra than one derived from non-cardenolide Allium schoenoprasum (chives) or no fecal shield at all. Thus, we here present data suggesting a new way how insects may gain protection by feeding on cardenolide-containing plants.
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Affiliation(s)
- Michael Baum
- Molecular Evolutionary Biology, Institute of Zoology, Universität Hamburg, Martin-Luther-King-Platz 3, 20146, Hamburg, Germany.
- Chemistry Education Department, IPN, Leibniz Institute for Science and Mathematics Education, Olshausenstraße 62, 24118, Kiel, Germany.
| | - Susanne Dobler
- Molecular Evolutionary Biology, Institute of Zoology, Universität Hamburg, Martin-Luther-King-Platz 3, 20146, Hamburg, Germany
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7
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Sun X, Ye Y, Sakurai N, Wang H, Kato K, Yu J, Yuasa K, Tsuji A, Yao M. Structural basis of EHEP-mediated offense against phlorotannin-induced defense from brown algae to protect akuBGL activity. eLife 2023; 12:RP88939. [PMID: 37910430 PMCID: PMC10619976 DOI: 10.7554/elife.88939] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2023] Open
Abstract
The defensive-offensive associations between algae and herbivores determine marine ecology. Brown algae utilize phlorotannin as their chemical defense against the predator Aplysia kurodai, which uses β-glucosidase (akuBGL) to digest the laminarin in algae into glucose. Moreover, A. kurodai employs Eisenia hydrolysis-enhancing protein (EHEP) as an offense to protect akuBGL activity from phlorotannin inhibition by precipitating phlorotannin. To underpin the molecular mechanism of this digestive-defensive-offensive system, we determined the structures of the apo and tannic acid (TNA, a phlorotannin analog) bound forms of EHEP, as well as the apo akuBGL. EHEP consisted of three peritrophin-A domains arranged in a triangular shape and bound TNA in the center without significant conformational changes. Structural comparison between EHEP and EHEP-TNA led us to find that EHEP can be resolubilized from phlorotannin precipitation at an alkaline pH, which reflects a requirement in the digestive tract. akuBGL contained two GH1 domains, only one of which conserved the active site. Combining docking analysis, we propose the mechanisms by which phlorotannin inhibits akuBGL by occupying the substrate-binding pocket, and EHEP protects akuBGL against this inhibition by binding with phlorotannin to free the akuBGL pocket.
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Affiliation(s)
- Xiaomei Sun
- Faculty of Advanced Life Science, Hokkaido UniversitySapporoJapan
| | - Yuxin Ye
- Faculty of Advanced Life Science, Hokkaido UniversitySapporoJapan
| | - Naofumi Sakurai
- Faculty of Advanced Life Science, Hokkaido UniversitySapporoJapan
| | - Hang Wang
- Faculty of Advanced Life Science, Hokkaido UniversitySapporoJapan
| | - Koji Kato
- Faculty of Advanced Life Science, Hokkaido UniversitySapporoJapan
| | - Jian Yu
- Faculty of Advanced Life Science, Hokkaido UniversitySapporoJapan
| | - Keizo Yuasa
- Graduate School of Bioscience and Bioindustry, Tokushima UniversityTokushimaJapan
| | - Akihiko Tsuji
- Graduate School of Bioscience and Bioindustry, Tokushima UniversityTokushimaJapan
| | - Min Yao
- Faculty of Advanced Life Science, Hokkaido UniversitySapporoJapan
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Pedroso AL, Schonwald MK, Dalla Corte CL, Soares FAA, Sperança A, Godoi B, de Carvalho NR. Effects of Rosmarinus officinalis L. ( Laminaceae) essential oil on adult and larvae of Drosophila melanogaster. Toxicol Res (Camb) 2023; 12:913-921. [PMID: 37915481 PMCID: PMC10615809 DOI: 10.1093/toxres/tfad081] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2023] [Revised: 07/28/2023] [Accepted: 08/31/2023] [Indexed: 11/03/2023] Open
Abstract
Rosmarinus officinalis (Lamiaceae family), also known as "alecrim," is a perennial herb, typical of the Mediterranean region and widely distributed in Brazilian territory. Despite having demonstrated several properties of human interest, insecticide/larvicidal effect of essential oil from R. officinalis on insects remains unclear. In this study, we tested the effects of R. officinalis essential oil on biomarkers of oxidative damage in Drosophila melanogaster. Exposure to R. officinalis essential oil increased adult mortality and decreased geotaxis behavior in adult fruit flies. In addition, essential oil increased of larval mortality and impaired the developmental success in D. melanogaster. R. officinalis essential oil showed a significant repellent effect, with duration time of about 6 h. To understand the mechanism underlying the toxicity of essential oil both pro-oxidant effects and biomarkers of oxidative damage were evaluated in exposed flies. Exposure to essential oil caused a significant redox imbalance with impairment of both enzymatic and non-enzymatic antioxidant system and increased the lipid peroxidation levels. These results suggest that R. officinalis essential oil can be used as a bioinsecticide and/or larvicide as well as an alternative insect repellent.
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Affiliation(s)
- Aline Lucca Pedroso
- Instituto Federal Farroupilha, Campus IFFar, Santo Ângelo, RS 98806-700, Brazil
| | | | - Cristiane Lenz Dalla Corte
- Departamento de Bioquímica e Biologia Molecular, Centro de Ciências Naturais e Exatas, Universidade Federal de Santa Maria, Campus UFSM, Santa Maria, RS 97105-900, Brazil
| | - Felix Alexandre Antunes Soares
- Departamento de Bioquímica e Biologia Molecular, Centro de Ciências Naturais e Exatas, Universidade Federal de Santa Maria, Campus UFSM, Santa Maria, RS 97105-900, Brazil
| | - Adriane Sperança
- Instituto Federal Farroupilha, Campus IFFar, Santo Ângelo, RS 98806-700, Brazil
| | - Benhur Godoi
- Núcleo de Síntese, Aplicação, e Análise de Compostos Orgânicos e Inorgânicos, Universidade Federal Fronteira Sul, Campus UFFS, Cerro Largo, RS 97900-000, Brazil
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Khokhlova IS, Fielden LJ, Shenbrot GI, Krasnov BR. Metabolic rate and ecological traits of ectoparasites: a case study with seven flea species from the Negev Desert. Parasitol Res 2023; 122:2317-2324. [PMID: 37522953 DOI: 10.1007/s00436-023-07931-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/28/2023] [Accepted: 07/27/2023] [Indexed: 08/01/2023]
Abstract
We studied the relationship between fleas' metabolic rate and their ecological traits, using data on standard metabolic rate (SMR), mean abundance, host specificity, and geographic range size in males and females of seven desert flea species. SMR was measured via mass-specific CO2 emission, whereas host specificity was measured as (a) the mean number of host species used by a flea per region in regions where this flea was recorded; (b) the total number of host species a flea exploited across its geographic range; and (c) the phylogenetic diversity of the flea's hosts. To control for confounding effects of phylogeny when analysing data on multiple species, we applied the Phylogenetic Generalised Least Squares (PGLS) model. We found that the only ecological trait significantly correlating with flea SMR was the phylogenetic diversity of hosts utilized by a flea across its geographic range. The strength of the association between SMR and host phylogenetic diversity was higher in male than in female fleas. We explain the relationship between flea SMR and their host specificity by the necessity of host-opportunistic species to compensate for the high energetic cost of neutralizing multiple defences from multiple hosts by increased SMR.
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Affiliation(s)
- Irina S Khokhlova
- French Associates Institute for Agriculture and Biotechnology of Drylands, Ben-Gurion University of the Negev, Sede Boqer Campus, Midreshet Ben-Gurion, Israel
| | - Laura J Fielden
- Biology Department, School of Science and Mathematics, Truman State University, Kirksville, MO, USA
| | - Georgy I Shenbrot
- Mitrani Department of Desert Ecology, Swiss Institute for Dryland Environmental and Energy Research, Jacob Blaustein Institutes for Desert Research, Ben-Gurion University of the Negev, Sede Boqer Campus, 8499000, Midreshet Ben-Gurion, Israel
| | - Boris R Krasnov
- Mitrani Department of Desert Ecology, Swiss Institute for Dryland Environmental and Energy Research, Jacob Blaustein Institutes for Desert Research, Ben-Gurion University of the Negev, Sede Boqer Campus, 8499000, Midreshet Ben-Gurion, Israel.
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Zhao XD, Geng YS, Hu TY, Li WX, Liang YY, Hao DJ. Comparing the Performance of Hyphantria cunea (Lepidoptera: Arctiidae) on Artificial and Natural Diets: Feasibility of Mass-Rearing on Artificial Diets. JOURNAL OF ECONOMIC ENTOMOLOGY 2023; 116:181-191. [PMID: 36412250 DOI: 10.1093/jee/toac176] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/23/2022] [Indexed: 06/16/2023]
Abstract
In China, Hyphantria cunea (Drury) is an invasive phytophagous pest; it attacks nearly all species of defoliated trees. To develop integrated pest management programs (IPM) for H. cunea, we need to ensure the availability of insects by mass-rearing them on artificial diets under laboratory conditions. This study compared the growth characteristics, nutritional indices, growth indices, and digestive enzyme activity of insects reared on Pterocarya stenoptera C.DC (Fagales: Juglandaceae), the Chinese wingnut, and an artificial diet. We also investigated the correlation between diet components and growth indices using principal components analysis and Pearson correlation analysis. We found that mass-rearing of H. cunea on an artificial diet was feasible. It led to a shorter developmental period, with heavier larvae and pupae than natural diets. The principal components analysis indicated that the growth indices and α-Amylase were significantly positively associated with PC1, which explained 82.45% of the total data variability. Pearson correlation analysis showed a significant correlation between digestion, absorption parameters, and growth. Developing a mass-rearing program to produce H. cunea on an artificial diet will be valuable for improving IPM strategies. Understanding the mechanism of the responses of phytophagous insect populations to anthropogenic diet regulation can provide new ideas and methods for pest control.
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Affiliation(s)
- Xu-Dong Zhao
- CoInnovation Center for Sustainable Forestry in Southern China, Nanjing Forestry University, 210037, Nanjing, China
- College of Forestry, Nanjing Forestry University, 210037, Nanjing, China
| | - Yi-Shu Geng
- CoInnovation Center for Sustainable Forestry in Southern China, Nanjing Forestry University, 210037, Nanjing, China
- College of Forestry, Nanjing Forestry University, 210037, Nanjing, China
| | - Tian-Yi Hu
- CoInnovation Center for Sustainable Forestry in Southern China, Nanjing Forestry University, 210037, Nanjing, China
- College of Forestry, Nanjing Forestry University, 210037, Nanjing, China
| | - Wen-Xuan Li
- CoInnovation Center for Sustainable Forestry in Southern China, Nanjing Forestry University, 210037, Nanjing, China
- College of Forestry, Nanjing Forestry University, 210037, Nanjing, China
| | - Ying-Ying Liang
- CoInnovation Center for Sustainable Forestry in Southern China, Nanjing Forestry University, 210037, Nanjing, China
- College of Forestry, Nanjing Forestry University, 210037, Nanjing, China
| | - De-Jun Hao
- CoInnovation Center for Sustainable Forestry in Southern China, Nanjing Forestry University, 210037, Nanjing, China
- College of Forestry, Nanjing Forestry University, 210037, Nanjing, China
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11
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Type of Stress Induces Differential Responses in Acer rubrum (Red Maple), but Induced Responses Have No Effect on Herbivorous Pests. INTERNATIONAL JOURNAL OF PLANT BIOLOGY 2022. [DOI: 10.3390/ijpb13040033] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
Plants thrive in dynamic environments requiring adaptive strategies in response to environmental stressors. Furthermore, insect herbivores may be attracted or deterred by the expression of these traits. This study examines growth, physiological, and phytochemical adaptations of maple trees in response to stressors and how these stressors effect herbivore feeding behavior within an agricultural production system. Agricultural systems are unique because plants experience environmental stressors unique to production such as herbicide sprays and girdling. Using four environmental stressors commonly observed in agricultural production (control, mechanical defoliation, chemical defoliation, and girdling), applied to two cultivars of red maple (Acer rubrum, ‘Brandywine’ and ‘Franksred’), this study analyzed differentiation of expressed traits in a production system. Responses varied depending on cultivar and stress treatment but had no effect on insect herbivore behavior. Understanding the ecological interactions within these systems will provide information for better plant production and pest management recommendations.
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12
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Manzoor M, Yang L, Wu S, El-Shafie H, Haider MS, Ahmad JN. Feeding preference of Rhynchophorus ferrugineus (Oliver) (Coleoptera: Curculionidae) on different date palm cultivars and host biochemical responses to its infestation. BULLETIN OF ENTOMOLOGICAL RESEARCH 2022; 112:494-501. [PMID: 35382914 DOI: 10.1017/s0007485321001012] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
To counter the insect infestation, plants respond with wide-ranging and highly dynamic biochemical reactions. Of these, the anti-oxidative activity is poorly understood. The red palm weevil (RPW) Rhynchophorus ferrugineus (Oliver), one of the most widespread pests in Pakistan, prefers to infest date palm Phoenix dactylifera. Our present study investigated the feeding preference of RPW to 11 different date palm cultivars and the results suggested that the Hillawi cultivar was most preferred. Greater infestation rate, fecundity and hatching rate were also recorded from Hillawi and Mozawati than other cultivars. No significant decreases were observed in chlorophyll a, chlorophyll b, total chlorophylls and carotenoids of RPW-infested Hillawi cultivar over un-infested control. In contrast, the contents of enzymatic antioxidants including phenols, proline, hydrogen peroxide, anthocyanin, malondialdehyde, ascorbic acid and glycine betaine showed a drastic increase after RPW infestation, and there was enhanced superoxide dismutase, peroxidase and catalase activities. Furthermore, we recorded the increase of total protein and sugar contents in RPW-infested date palms. These findings offer valuable insight into the antioxidative molecular mechanism of date palms under RPW attack and may contribute to the breeding of insect-resistant crops.
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Affiliation(s)
- Mujahid Manzoor
- Institute of Agricultural Sciences, University of the Punjab, Lahore, Pakistan
- Department of Entomology, University of Agriculture Faisalabad, Faisalabad, Pakistan
| | - Lei Yang
- Hainan University, Haikou, China
| | | | - Hamadttu El-Shafie
- Date Palm Research Center of Excellence, King Faisal University, Al-Ahsa, Saudi Arabia
| | | | - Jam Nazeer Ahmad
- Department of Entomology, University of Agriculture Faisalabad, Faisalabad, Pakistan
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13
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Puri S, Singh S, Sohal SK. Oviposition behaviour and biochemical response of an insect pest, Zeugodacus cucurbitae (Coquillett) (Diptera: Tephritidae) to plant phenolic compound phloroglucinol. Comp Biochem Physiol C Toxicol Pharmacol 2022; 255:109291. [PMID: 35121130 DOI: 10.1016/j.cbpc.2022.109291] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/29/2021] [Revised: 01/20/2022] [Accepted: 01/26/2022] [Indexed: 12/12/2022]
Abstract
Phenolic compounds are the secondary metabolites (SMs) present in plants carrying different bioactivities. In the present study, we explored the influence of a phenolic compound namely phloroglucinol on oviposition behaviour and different biochemical entities of an insect pest Zeugodacus cucurbitae (Coquillett) (Diptera: Tephritidae) using artificial diet. Phloroglucinol (IUPAC name: benzene-1,3,5-triol) affected the activity of antioxidant and detoxifying enzymes viz. superoxide dismutases (SOD), catalase (CAT), ascorbate peroxidases (APOX). dehydroascorbate reductase (DHAR), peroxidases (POX), phenol oxidase (PO), glutathione peroxidase (GPOX), glutathione S-transferase peroxidase (GSTpox), glutathione reductase (GR), glutathione S-transferase (GST) and esterases (EST) as well as the biological antioxidants viz. ascorbate content and glutathione. The lipid peroxide content (LP) and hydrogen peroxide content (H2O2) were significantly enhanced in the treated larvae indicating oxidative stress in the insect. Significant inhibition in oviposition was observed and effective repellency percentage increased with phloroglucinol treatment as compared to control. The oviposition deterrent activity and toxic effects of phloroglucinol on various biochemical parameters of Z. cucurbitae larvae revealed in the present study clearly confirms its suitability for use in pest management.
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Affiliation(s)
- Shivali Puri
- Department of Zoology, Guru Nanak Dev University, Amritsar, Punjab 143005, India
| | - Sumit Singh
- Department of Zoology, Guru Nanak Dev University, Amritsar, Punjab 143005, India
| | - Satwinder Kaur Sohal
- Department of Zoology, Guru Nanak Dev University, Amritsar, Punjab 143005, India.
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14
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Plant Secondary Metabolites as Defense Tools against Herbivores for Sustainable Crop Protection. Int J Mol Sci 2022; 23:ijms23052690. [PMID: 35269836 PMCID: PMC8910576 DOI: 10.3390/ijms23052690] [Citation(s) in RCA: 93] [Impact Index Per Article: 46.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/31/2021] [Revised: 02/15/2022] [Accepted: 02/22/2022] [Indexed: 02/04/2023] Open
Abstract
Plants have evolved several adaptive strategies through physiological changes in response to herbivore attacks. Plant secondary metabolites (PSMs) are synthesized to provide defensive functions and regulate defense signaling pathways to safeguard plants against herbivores. Herbivore injury initiates complex reactions which ultimately lead to synthesis and accumulation of PSMs. The biosynthesis of these metabolites is regulated by the interplay of signaling molecules comprising phytohormones. Plant volatile metabolites are released upon herbivore attack and are capable of directly inducing or priming hormonal defense signaling pathways. Secondary metabolites enable plants to quickly detect herbivore attacks and respond in a timely way in a rapidly changing scenario of pest and environment. Several studies have suggested that the potential for adaptation and/or resistance by insect herbivores to secondary metabolites is limited. These metabolites cause direct toxicity to insect pests, stimulate antixenosis mechanisms in plants to insect herbivores, and, by recruiting herbivore natural enemies, indirectly protect the plants. Herbivores adapt to secondary metabolites by the up/down regulation of sensory genes, and sequestration or detoxification of toxic metabolites. PSMs modulate multi-trophic interactions involving host plants, herbivores, natural enemies and pollinators. Although the role of secondary metabolites in plant-pollinator interplay has been little explored, several reports suggest that both plants and pollinators are mutually benefited. Molecular insights into the regulatory proteins and genes involved in the biosynthesis of secondary metabolites will pave the way for the metabolic engineering of biosynthetic pathway intermediates for improving plant tolerance to herbivores. This review throws light on the role of PSMs in modulating multi-trophic interactions, contributing to the knowledge of plant-herbivore interactions to enable their management in an eco-friendly and sustainable manner.
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15
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Nugroho ABD, Lee SW, Pervitasari AN, Moon H, Choi D, Kim J, Kim DH. Transcriptomic and metabolic analyses revealed the modulatory effect of vernalization on glucosinolate metabolism in radish (Raphanus sativus L.). Sci Rep 2021; 11:24023. [PMID: 34912010 PMCID: PMC8674254 DOI: 10.1038/s41598-021-03557-5] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/10/2021] [Accepted: 12/01/2021] [Indexed: 12/13/2022] Open
Abstract
Vernalization is the process by which long-term cold like winter triggers transition to flowering in plants. Many biennial and perennial plants including Brassicaceae family plants require vernalization for floral transition. Not only floral transition, but dynamic physiological and metabolic changes might also take place during vernalization. However, vernalization-mediated metabolic change is merely investigated so far. One of secondary metabolites found in Brassiceceae family plants is glucosinolates (GSLs). GSLs provides defense against pathogens and herbivores attack in plants and also exhibits inhibitory activity against human cancer cell. Profiles of GSLs are highly modulated by different environmental stresses in Brassciaceae family plants. To grasp the effect of vernalization on GSLs metabolic dynamics in radish (Raphanus sativus L.), we performed transcriptomic and metabolic analysis during vernalization in radish. Through transcriptome analysis, we found many GSLs metabolic genes were significantly down-regulated by vernalization in radish plants. Ultra-High Performance Liquid Chromatography analysis also revealed that GSLs compounds were substantially reduced in vernalized radish samples compared to non-vernalized radish samples. Furthermore, we found that repressive histone modification (i.e. H3K27me3) is involved in the modulation of GSLs metabolism via epigenetic suppression of Glucoraphasatin Synthase 1 (GRS1) during vernalization in radish. This study revealed that GSLs metabolism is modulated by vernalization, suggestive of a newly identified target of vernalization in radish.
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Affiliation(s)
- Adji Baskoro Dwi Nugroho
- Department of Plant Science and Technology, Chung-Ang University, Anseong, 17546, Republic of Korea
| | - Sang Woo Lee
- Department of Plant Science and Technology, Chung-Ang University, Anseong, 17546, Republic of Korea
| | | | - Heewon Moon
- Department of Plant Science and Technology, Chung-Ang University, Anseong, 17546, Republic of Korea
| | - Dasom Choi
- Department of Plant Science and Technology, Chung-Ang University, Anseong, 17546, Republic of Korea
| | - Jongkee Kim
- Department of Plant Science and Technology, Chung-Ang University, Anseong, 17546, Republic of Korea
| | - Dong-Hwan Kim
- Department of Plant Science and Technology, Chung-Ang University, Anseong, 17546, Republic of Korea. .,Research Center for Plant Plasticity, Seoul National University, Seoul, 08826, Republic of Korea.
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16
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Rasool S, Vidkjaer NH, Hooshmand K, Jensen B, Fomsgaard IS, Meyling NV. Seed inoculations with entomopathogenic fungi affect aphid populations coinciding with modulation of plant secondary metabolite profiles across plant families. THE NEW PHYTOLOGIST 2021; 229:1715-1727. [PMID: 33006149 DOI: 10.1111/nph.16979] [Citation(s) in RCA: 26] [Impact Index Per Article: 8.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/30/2020] [Accepted: 09/14/2020] [Indexed: 06/11/2023]
Abstract
Entomopathogenic fungi (EPF) can display a plant-associated lifestyle as endophytes. Seed application of EPF can affect insect herbivory above ground, but the mechanisms behind this are not documented. Here we applied three EPF isolates, Beauveria bassiana, Metarhizium brunneum and M. robertsii, as seed inoculation of wheat and bean, and evaluated the effects on population growth of aphids, Rhopalosiphum padi and Aphis fabae, respectively. In wheat and bean leaves, we quantified benzoxazinoids and flavonoids, respectively, in response to EPF inoculation and aphid infestation to elucidate the role of specific plant secondary metabolites (PSMs) in plant-fungus-herbivore interactions. Inoculations of wheat and bean with M. robertsii and B. bassiana reduced aphid populations compared with control treatments, whereas M. brunneum unexpectedly increased the populations of both aphids. Concentrations of the majority of PSMs were differentially altered in EPF-treated plants infested with aphids. Changes in aphid numbers were associated with PSMs regulation rather than EPF endophytic colonisation capacity. This study links the effects of EPF seed inoculations against aphids with unique PSM accumulation patterns in planta. The understanding of PSM regulation in tri-trophic interactions is important for the future development of EPF for pest management.
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Affiliation(s)
- Shumaila Rasool
- Department of Plant and Environmental Sciences, University of Copenhagen, Thorvaldesensvej 40, Frederiksberg C, 1871, Denmark
| | - Nanna H Vidkjaer
- Department of Agroecology, Aarhus University, Forsøgsvej 1, Slagelse, 4200, Denmark
| | - Kourosh Hooshmand
- Department of Agroecology, Aarhus University, Forsøgsvej 1, Slagelse, 4200, Denmark
| | - Birgit Jensen
- Department of Plant and Environmental Sciences, University of Copenhagen, Thorvaldesensvej 40, Frederiksberg C, 1871, Denmark
| | - Inge S Fomsgaard
- Department of Agroecology, Aarhus University, Forsøgsvej 1, Slagelse, 4200, Denmark
| | - Nicolai V Meyling
- Department of Plant and Environmental Sciences, University of Copenhagen, Thorvaldesensvej 40, Frederiksberg C, 1871, Denmark
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