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5 results on '"Peng Meng"'

4. Rice phenolamindes reduce the survival of female adults of the white-backed planthopper Sogatella furcifera

Author

Yonggen Lou, Wanwan Wang, Zhuoxian Yu, Jun Wu, Jin-Peng Meng, Jin Zhang, Pengyong Zhou, and Ting Luo

Subjects
0106 biological sciences, 0301 basic medicine, Agmatine, Coumaric Acids, Spermidine, Tyramine, lcsh:Medicine, Cyclopentanes, medicine.disease_cause, 01 natural sciences, Article, Host-Parasite Interactions, Toxicology, Hemiptera, 03 medical and health sciences, Planthopper, chemistry.chemical_compound, Infestation, medicine, Putrescine, Bioassay, Animals, Herbivory, Oxylipins, Isoleucine, Nymph, lcsh:Science, Plant Diseases, Herbivore, Multidisciplinary, biology, Jasmonic acid, lcsh:R, food and beverages, Oryza, Hydrogen Peroxide, Ethylenes, biology.organism_classification, White (mutation), 030104 developmental biology, chemistry, Plant stress responses, Female, lcsh:Q, Brown planthopper, 010606 plant biology & botany
Abstract

In response to infestation by herbivores, rice plants rapidly biosynthesize defense compounds by activating a series of defense-related pathways. However, which defensive compounds in rice are effective against herbivores remains largely unknown. We found that the infestation of white-backed planthopper (WBPH) Sogatella furcifera gravid females significantly increased levels of jasmonic acid (JA), jasmonoyl-isoleucine (JA-Ile) and H2O2, and reduced the level of ethylene in rice; levels of 11 of the tested 12 phenolamides (PAs) were subsequently enhanced. In contrast, WBPH nymph infestation had no effect on levels of JA, JA-Ile, ethylene and H2O2 in rice, and enhanced levels of only 2 of 12 PAs. Moreover, infestation by brown planthopper Nilaparvata lugens gravid females also affected the production of these PAs differently. Bioassays revealed that 4 PAs – N-feruloylputrescine, N-feruloyltyramine, feruloylagmatine and N1,N10-diferuloylspermidine – were toxic to newly emerged WBPH female adults. Our results suggest that WBPH- or BPH-induced biosynthesis of PAs in rice seems to be shaped primarily by the specific profile of defense-related signals elicited by the herbivore and that PAs play a role in conferring the resistance to WBPH on rice.

Published
2020
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5. Investigation on the contaminate of hand washing activities on the surface of environmental objects in intensive care unit

Author

Fang-ying Tian, Xue-yu Wang, Hao-peng Meng, Jian-bang Kang, Ming Zhao, and Hong-wei Wang

Subjects
Intensive care units, Taps, Droplets, Contaminate situation, Medicine, Science
Abstract

Abstract To detect the contaminate of faucets in hospitals and the splash during hand washing, and to explore the reasonable layout of hand washing pools. Two faucets with roughly the same spatial layout in the ICU of a third-class first-class general hospital were selected, and the farthest splashing distance and specific splashing points were measured by color paper. Samples were detected by ATP detection technology and routine microbial detection method, and the contaminate of faucets was analyzed. After 72 h of daily hand-washing activities, the furthest distance to the splash point was about 100 cm around the faucet, and the place 40–110 cm around the faucet was contaminated seriously. The farthest distance that the splash point reached was about 80 cm around the faucet with the center of the circle, and the area 40–60 cm around the faucet was heavily contaminated. The distance from the water outlet of the long handle and the short handle faucet to the detection point had a high negative correlation (r = − 0.811, P

Published
2024
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