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A Study on a Dynamic Radar Cross Section Analysis Technique for a Surface Warship

2009/01/01 by Lieceng Zhu, Ming-Shun Chen, Ming‐Shun Chen +6 · 4 citations
Agricultural and Biological Sciences · Earth and Planetary Sciences · Engineering · Environmental Science · #Aerospace engineering #Agronomy #Allelopathy and phytotoxic interactions #Biology #Botany #Cecidomyiidae #Engineering #Gall #Hessian matrix #Horticulture #Hull #Infestation #Insect-Plant Interactions and Control #Marine engineering #Maritime Transport Emissions and Efficiency #Naval architecture #Nematode management and characterization studies #Ocean Waves and Remote Sensing #Radar #Radar cross-section #Response amplitude operator #Ship Hydrodynamics and Maneuverability

paper · doi:10.1603/ec10455

published in Journal of Ocean Engineering and Technology 23(6), 77-81 (The Korean Society of Ocean Engineers)

openalex publication_date 2009/01/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/01

Abstract

Phytohormones and fatty acids (FAs) play important roles in plant resistance to insects and pathogens. In this study, we investigated the similarities and differences in the accumulations of phytohormones and FAs in the resistant wheat (Triticum aestivum L.) 'Molly' and the nonhost rice (Oryza sativa L.) 'Niponbare' in responses to Hessian fly, Mayetiola destructor (Say) (Diptera: Cecidomyiidae), larval attacks. Using chemical ionization-gas-chromatography/mass spectrometry, we analyzed the concentrations of 13 phytohomones and FAs at the attack site of wheat and rice plants at 1, 6, 24, or 48 h after the initial attack. Hessian fly attack resulted in increases of salicylic acid (SA), 12-oxo-phytodienoic acid (OPDA), palmitic acid (FA16:0), but a decrease of abscisic acid in both wheat and rice plants. In addition, the accumulation of jasmonic acid (JA) increased, whereas the accumulation of cinnamic acid (CA) decreased in wheat plants, but no changes were observed in the accumulation of JA, and the accumulation of CA increased in rice plants after Hessian fly attack. However, the accumulations of benzoic acid, strearic acid (FA18:0), and oleic acid (FA18:1) increased in rice plants, but no changes were observed in wheat plants after Hessian fly attack. Hessian fly-induced changes were more rapid in wheat plants in comparison with those in rice plants. Our study suggests that SA and OPDA may be involved in resistance of wheat and rice plants to Hessian fly and that the R gene-mediated resistance responses are more rapid than nonhost resistance responses.

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