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Liao Guangrong,Li Jitong,Fan Wenyan,Chen Lin,Liu Jinglan 한국응용곤충학회 2023 Journal of Asia-Pacific Entomology Vol.26 No.2
The incidence of drought stress in plants has been increasing due to global warming, and the phytohormone abscisic acid (ABA) induces the formation of physical barriers in plants, such as callose accumulation. The brown planthopper (BPH; Nilaparvata lugens Stål) occurs throughout Asia and feeds on rice, but the effects of drought stress on BPH feeding remain unclear. In this study, we observed changes in callose formation and ABA content in rice during drought stress. ABA content and the relative expression of ABA synthesis genes OsNCED3 and OsNCED5 were higher in drought-stressed rice than the non-stressed control. Similarly, the expression levels of callose synthesis genes and callose deposition were significantly higher in drought-stressed rice as compared to non-stressed plants, and this impacted BPH feeding. Our results indicated that rice resistance to BPH increased during drought stress due to the accumulation of callose and increasing ABA levels. Our findings provide a basis for understanding BPH feeding performance on rice during drought stress and offer novel insights relative to control during periods of water shortage.
Jia Chen,Jianhua Shao,Chunchao Zhao,Jie Shen,Ziling Dong,Wenyan Liu,Min Zhao,Judi Fan 대한약학회 2018 Archives of Pharmacal Research Vol.41 No.6
Three new neolignans, fordianoles A-C (1–3),characterized as (7S,8R)-4-hydroxy-3,30,50-trimethoxy-80,90-dinor-8,40-oxyneolignan-7,70,9-triol, (7R,8R)-4-hydroxy-3,30,50-trimethoxy-80,90-dinor-8,40-oxyneolignan-7,70,9-triol, and (7R,8R)-4-hydroxy-3,30,50-trimethoxy-8,40-oxyneolignan-7,9,90-triol-70-one, together with an unusual c-lactone,3-(3,4-dihydroxyphenyl)-4-pentanolide (4), andtwenty-five known compounds (5–29) were isolated fromthe aerial parts of Viburnum fordiae Hance. Their structuresincluding absolute configurations were determined byspectroscopic and chemical methods. Among them, compounds6, 7, 11–15, 17–28 were isolated from the Viburnumgenus for the first time. The anti-inflammatory and antioxidantactivities of all compounds were evaluated in vitro. Compounds 15, 19, 20 and 29 showed significant inhibitoryactivity on NO production in RAW264.7 cells stimulated byLPS with IC50 values ranging from 8.60 to 13.92 lM. Meanwhile, compounds 1–4, 15, 19, 20, 22, 23, 25, 26 and29 exhibited varying antioxidant activities through DPPH,ABTS free radical scavenging and FRAP assays.