The herbivore‐induced plant volatile tetradecane enhances plant resistance to Holotrichia parallela larvae in maize roots

2021 ◽  
Author(s):  
Yu Pan ◽  
Zhun Wang ◽  
Shi‐Wen Zhao ◽  
Xiao Wang ◽  
Yun‐Shuo Li ◽  
...  
Keyword(s):  
Plant Resistance ◽  
Holotrichia Parallela ◽  
Plant Volatile ◽  
Maize Roots

scholarly journals Plant defences limit herbivore population growth by changing predator–prey interactions

2017 ◽  
Vol 284 (1862) ◽  
pp. 20171120 ◽  
Author(s):  
Mônica F. Kersch-Becker ◽  
André Kessler ◽  
Jennifer S. Thaler
Keyword(s):  
Population Growth ◽  
Plant Resistance ◽  
Prey Availability ◽  
Factors Affecting ◽  
Low Resistance ◽  
Plant Volatile ◽  
Natural Predator ◽  
Consumption Rates ◽  
The Impact ◽  
Predator Community

Plant quality and predators are important factors affecting herbivore population growth, but how they interact to regulate herbivore populations is not well understood. We manipulated jasmonate-induced plant resistance, exposure to the natural predator community and herbivore density to test how these factors jointly and independently affect herbivore population growth. On low-resistance plants, the predator community was diverse and abundant, promoting high predator consumption rates. On high-resistance plants, the predator community was less diverse and abundant, resulting in low predator consumption rate. Plant resistance only directly regulated aphid population growth on predator-excluded plants. When predators were present, plant resistance indirectly regulated herbivore population growth by changing the impact of predators on the herbivorous prey. A possible mechanism for the interaction between plant resistance and predation is that methyl salicylate, a herbivore-induced plant volatile attractive to predators, was more strongly induced in low-resistance plants. Increased plant resistance reduced predator attractant lures, preventing predators from locating their prey. Low-resistance plants may regulate herbivore populations via predators by providing reliable information on prey availability and increasing the effectiveness of predators.

scholarly journals Mechanisms of Soybean Host-Plant Resistance Against Megacopta cribraria (Hemiptera: Plataspidae)

2020 ◽  
Vol 49 (4) ◽  
pp. 876-885
Author(s):  
S Lahiri ◽  
D D Reisig ◽  
Lisa L Dean ◽  
F P F Reay-Jones ◽  
J K Greene ◽  
...  
Keyword(s):  
Host Plant ◽  
Plant Resistance ◽  
Host Plant Resistance ◽  
Hexadecenoic Acid ◽  
Mechanisms Of Resistance ◽  
Useful Knowledge ◽  
Plant Volatile ◽  
Volatile Organic ◽  
Positive Correlations

Abstract A number of soybean varieties traditionally bred for resistance to various soybean arthropod pests have been identified as resistant to Megacopta cribraria (F.) (Hemiptera: Plataspidae). However, the mechanisms of host-plant resistance (HPR) in this system are not understood. The goal of this study was to identify the mechanisms of resistance by examining the role of plant volatile organic compounds (VOCs) and free amino acids (FAAs) among 16 soybean varieties. Choice and no-choice cage experiments identified several soybean varieties that demonstrated antixenosis as well as antibiosis. However, resistance varied over time in certain soybean varieties, such as N02-7002 and PI567352B. Mean nymph number from choice experiments had positive correlations with the FAAs asparagine, tryptophan, alanine, phenylanaline, and serine; negative correlation with leucine and threonine. Four plant volatiles, hexanal, 2-pentylfuran, beta-cyclocitral, and cis-9-hexadecenal, were positively correlated with subsequent nymph development, whereas n-hexadecenoic acid was negatively correlated with nymph number only, in adult choice cage experiments. This study contributes to understanding the mechanisms of HPR through associations with plant VOCs and FAAs in relation to M. cribraria development and provides useful knowledge for developing soybean varieties for M. cribraria management.

scholarly journals POTENSI BAKTERI ENDOFIT DALAM MENEKAN PENYAKIT LAYU STEWART (PANTOEA STEWARTII SUBSP. STEWARTII) PADA TANAMAN JAGUNG

2014 ◽  
Vol 14 (2) ◽  
pp. 121-127
Author(s):  
Haliatur Rahma ◽  
Aprizal Zainal ◽  
Memen Suharman ◽  
Meity S Sinaga ◽  
Giyanto .
Keyword(s):  
Disease Severity ◽  
Plant Resistance ◽  
Endophytic Bacteria ◽  
Wilt Disease ◽  
Biocontrol Agents ◽  
Disease Development ◽  
Grass Roots ◽  
Pantoea Stewartii ◽  
Maize Roots

Potential of endophytic bacteria to control stewart wilt disease (Pantoea stewartii subsp. stewartii) in maize. The purpose of this study was to explore endophytic bacteria from seedling, maize roots and grass roots as well as to test the ability of endophytic bacteria which could potentially suppress stewart wilt disease development in maize. Characterization of endophytic bacteria as biocontrol agents including: do not induce HR on tobacco, synthesize IAA, dissolve phosphate, produce siderophores, and antibiotic to Pantoea stewartii subsp. stewartii (Pnss). The results of research shoed 17 isolates of endophytic bacteria potentially as candidate biocontrol agents. Nine isolates were able to produce IAA, siderofores and phosphatase; two isolates produce IAA and phosphatase; six isolates produce IAA. Six isolates ie: AR1, AJ34, AJ15, AJ19, and AJ14 AN6, can increase maize plant resistance and suppress stewart wilt disease severity with a range of 48.95-55.60%.

scholarly journals Biology and Management of Pest Diabrotica Species in South America

Insects ◽  
2020 ◽  
Vol 11 (7) ◽  
pp. 421
Author(s):  
Guillermo Cabrera Walsh ◽  
Crébio J. Ávila ◽  
Nora Cabrera ◽  
Dori E. Nava ◽  
Alexandre de Sene Pinto ◽  
...  
Keyword(s):  
South America ◽  
Crop Rotation ◽  
Plant Resistance ◽  
Larval Stage ◽  
Management Tool ◽  
Agricultural Pests ◽  
Management Options ◽  
Egg Diapause ◽  
Maize Roots ◽  
Stage D

The genus Diabrotica has over 400 described species, the majority of them neotropical. However, only three species of neotropical Diabrotica are considered agricultural pests: D. speciosa, D. balteata, and D. viridula. D. speciosa and D. balteata are polyphagous both as adults and during the larval stage. D. viridula are stenophagous during the larval stage, feeding essentially on maize roots, and polyphagous as adults. The larvae of the three species are pests on maize, but D. speciosa larvae also feed on potatoes and peanuts, while D. balteata larvae feed on beans and peanuts. None of these species express a winter/dry season egg diapause, displaying instead several continuous, latitude-mediated generations per year. This hinders the use of crop rotation as a management tool, although early planting can help in the temperate regions of the distribution of D. speciosa. The parasitoids of adults, Celatoria bosqi and Centistes gasseni, do not exert much control on Diabrotica populations, or show potential for inundative biocontrol plans. Management options are limited to insecticide applications and Bt genetically modified (GM) maize. Other techniques that show promise are products using Beauveria bassiana and Heterorhabditis bacteriophora, semiochemical attractants for monitoring purposes or as toxic baits, and plant resistance.

Transcriptome analysis of maize reveals potential key genes involved in the response to belowground herbivore Holotrichia parallela larvae feeding

Genome ◽  
2020 ◽  
Vol 63 (1) ◽  
pp. 1-12 ◽  
Author(s):  
Yu Pan ◽  
Shi-wen Zhao ◽  
Xin-long Tang ◽  
Shang Wang ◽  
Xiao Wang ◽  
...  
Keyword(s):  
Transcriptome Analysis ◽  
Defense Mechanisms ◽  
Molecular Mechanisms ◽  
Target Genes ◽  
Expression Profiles ◽  
Go Annotation ◽  
Holotrichia Parallela ◽  
Maize Roots ◽  
Gene Transcription Level ◽  
Maize Plants

The larvae of Holotrichia parallela, a destructive belowground herbivore, causes tremendous damages to maize plants. However, little is known if there are any defense mechanisms in maize roots to defend themselves against this herbivore. In the current research, we carried out RNA-sequencing to investigate the changes in gene transcription level in maize roots after H. parallela larvae infestation. A total of 644 up-regulated genes and 474 down-regulated genes was found. In addition, Gene ontology (GO) annotation analysis and Kyoto Encyclopedia of Genes and Genomes (KEGG) pathway analysis were performed. Weighted gene co-expression network analysis (WGCNA) indicated that peroxidase genes may be the hub genes that regulate maize defenses to H. parallela larvae attack. We also found 105 transcription factors, 44 hormone-related genes, and 62 secondary metabolism-related genes within differentially expressed genes (DEGs). Furthermore, the expression profiles of 12 DEGs from the transcriptome analysis were confirmed by quantitative real-time PCR experiments. This transcriptome analysis provides insights into the molecular mechanisms of the underground defense in maize roots to H. parallela larvae attack and will help to select target genes of maize for defense against belowground herbivory.

A specialist root herbivore reduces plant resistance and uses an induced plant volatile to aggregate in a density-dependent manner

2012 ◽  
Vol 26 (6) ◽  
pp. 1429-1440 ◽  
Author(s):  
Christelle A. M. Robert ◽  
Matthias Erb ◽  
Bruce E. Hibbard ◽  
B. Wade French ◽  
Claudia Zwahlen ◽  
...  
Keyword(s):  
Plant Resistance ◽  
Dependent Manner ◽  
Density Dependent ◽  
Plant Volatile ◽  
Root Herbivore

Effects of pH on proton transport by vacuolar pumps from maize roots

1992 ◽  
Vol 86 (1) ◽  
pp. 63-70 ◽  
Author(s):  
David Brauer ◽  
DeNea Conner ◽  
Shu-I Tu
Keyword(s):  
Proton Transport ◽  
Maize Roots ◽  
Effects Of Ph

Anti-biofilm potential of some plant volatile compounds against Proteus mirabilis

Planta Medica ◽  
2016 ◽  
Vol 81 (S 01) ◽  
pp. S1-S381
Author(s):  
JAA do Nascimento Júnior ◽  
BS dos Santos ◽  
LCA de Araújo ◽  
AVA Lima ◽  
TD da Silva ◽  
...  
Keyword(s):  
Volatile Compounds ◽  
Proteus Mirabilis ◽  
Plant Volatile ◽  
Plant Volatile Compounds
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