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Changes in Metabolites and Allelopathic Effects of Non-Pigmented and Black-Pigmented Lowland Indica Rice Varieties in Phosphorus Deficiency

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Rice science 2024年第4期31卷 434-448,I0025,I0026页

作者： Liyana SARA sompop saeheng Panupong PUTTARAK Lompong KLINNAWEE Division of Biological Science Faculty of SciencePrince of Songkla UniversitySongkhla 90110Thailand Division of Health and Applied Sciences Faculty of SciencePrince of Songkla UniversitySongkhla 90110Thailand Plant Cell and Physiology for Sustainable Agriculture Research Unit Faculty of SciencePrince of Songkla UniversitySongkhla 90110Thailand Department of Pharmacognosy and Pharmaceutical Botany Faculty of Pharmaceutical SciencesPrince of Songkla UniversitySongkhla 90110Thailand Phytomedicine and Pharmaceutical Biotechnology Excellence Center Prince of Songkla UniversitySongkhla 90110Thailand

Phosphorus(P) levels alter the allelopathic activity of rice seedlings against lettuce seeds. In this study, we investigated the effect of P deficiency on the allelopathic potential of non-pigmented and pigmented rice varieties. Rice seedlings of the white variety Khao Dawk Mali(KDML105, non-pigmented) and the black varieties Jao Hom Nin(JHN, pigmented) and Riceberry(RB, pigmented) were cultivated under high P(HP) and low P(LP) conditions. Morphological and metabolic responses to P deficiency were investigated. P deficiency inhibited shoot growth but promoted root growth of rice seedlings in all three varieties. Moreover, P deficiency led to decreased cytosolic phosphate(Pi) and total P concentrations in both shoot and root tissues. The subsequent reduction in internal P concentration enhanced the accumulation of phenolic compounds in both shoot and root tissues of the seedlings. Subsequently, allelopathy-based inter-and intra-specific interactions were assessed using water extracts from seedlings of the three varieties grown under HP and LP conditions. These extracts were tested on seeds of lettuce, the weed Dactyloctenium aegyptium, and the same rice variety. The shoot and root extracts from P-deficient seedlings reduced the germination of all recipient plants. Specifically, the shoot extract from P-deficient KDML105 seedlings reduced the germination index(GI) of lettuce seeds to 1%, while those from P-deficient RB and JHN seedlings produced GIs of 32% and 42%, respectively. However, when rice seeds were exposed to their own LP shoot and root extracts, their GIs increased up to 4-fold, compared with the HP extracts. Additionally, the shoot extracts from P-deficient plants also stimulated the germination of D. aegyptium by about 2–3-fold, whereas the root extracts did not have this effect. Therefore, P starvation led to the accumulation and exudation of phenolics in the shoots and roots of rice seedlings, altering their allelopathic activities. To adapt to P defici

关键词： phosphorus deficiency non-pigmented and black-pigmented rice phenolics extract allelopathy

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Modelling epidemic growth models for lumpy skin disease cases in Thailand using nationwide outbreak data,2021e2022

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Infectious Disease Modelling 2023年第1期8卷 282-293页

作者： sompop Moonchai Adsadang Himakalasa Thaned Rojsiraphisal Orapun Arjkumpa Pawares Panyasomboonying Noppasorn Kuatako Noppawan Buamithup Veerasak Punyapornwithaya Advanced Research Center for Computational Simulation Chiang Mai UniversityChiang Mai50200Thailand Department of Mathematics Faculty of ScienceChiang Mai UniversityChiang Mai50200Thailand Data Science Research Center Department of MathematicsFaculty of ScienceChiang Mai UniversityChiang Mai50200Thailand The 4th Regional Livestock Office Department of Livestock DevelopmentKhon Kaen40206Thailand Bureau of Disease Control and Veterinary Services Department of Livestock DevelopmentBangkok10400Thailand Center of Excellence in Veterinary Public Health Faculty of Veterinary MedicineChiang Mai UniversityChiang Mai50100Thailand Department of Food Animal Clinics Faculty of Veterinary MedicineChiang Mai UniversityChiang Mai50100Thailand

Lumpy skin disease(LSD)is a transboundary disease affecting cattle and has a detrimental effect on the cattle industries in numerous countries in Africa,Europe and *** 2021,LSD outbreaks have been reported in almost all of Thailand's ***,fitting LSD occurrences using mathematical models provide important knowledge in the realm of animal disease ***,the objective of this study is to fit the pattern of daily new LSD cases and daily cumulative LSD cases in Thailand using mathematical *** first-and second-order models in the forms of Lorentzian,Gaussian and Pearson-type VII models are used to fit daily new LSD cases whereas Richard's growth,Boltzmann sigmoidal and Power-law growth models are utilized to fit the curve of cumulative LSD *** on the root-mean-squared error(RMSE)and Akaike information criterion(AIC),results showed that both first and second orders of Pearson-type VII models and Richard's growth model(RGM)were fit to the data better than other models used in the present *** obtained models and their parameters can be utilized to describe the LSD outbreak in *** disease preparedness purposes,we can use the first order of the Pearson-type VII model to estimate the time of maximum infected cases occurring when the growth rate of infected cases starts to slow ***,the period when the growth rate changes at a slower rate,known as the inflection time,obtained from RGM allows us to anticipate when the pandemic has peaked and the situation has *** is the first study that utilizes mathematical methods to fit the LSD epidemics in *** study offers decision-makers and authorities with valuable information for establishing an effective disease control strategy.

关键词： Epidemic growth Mathematical model Lumpy skin disease Outbreaks Thailand

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泡沫经济对泰国社会经济和文化的影响以及中国经验

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东南亚纵横 2000年第S2期 70-75页

作者： sompop Manarungsan 陈柳婷泰国朱拉隆功大学广西大学外国语学院

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Salivary cytokines and levels in denture stomatitis: An exploratory case-control study

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Open Journal of Stomatology 2012年第4期2卷 326-333页

作者： Silvana P. Barros Sandra Al-Tarawneh sompop Bencharit Zvi Loewy Linda Gendreau Steven Offenbacher Department of Periodontology School of Dentistry University of North Carolina Chapel Hill USA Department of Pharmaceutical and Biomedical Sciences Touro College of Pharmacy New York USA Department of Pharmacology School of Medicine University of North Carolina Chapel Hill USA Department of Prosthodontics School of Dentistry University of North Carolina Chapel Hill USA GlaxoSmithKline Consumer Healthcare Parsippany USA

We aimed to evaluate the microbial and inflammatory characteristics associated with Denture Stomatitis (DS) analyzing: l) Levels of salivary cytokines and cultivable C. albicans;2) DNA-DNA checkerboard on biofilm associated with mucosal tissue-bearing denture surfaces, 3) Serum C-reactive protein (CRP) levels. Thirty-two subjects were enrolled in the study with control (n = 17) and DS types II and III (n = 15) subjects. Samples were collected from unstimulated whole saliva, serum and swabs from denture surfaces. Salivary levels of inflammatory mediators and CRP were measured by multiplex. Samples from denture and mucosal surfaces were analyzed by DNA-DNA checkerboard. Saliva from DS subjects showed increase in IL-8 (p = 0.04) and IL-1β (p = 0.04) with trend for increase in IL-1β, TNFα and IL-6 levels. C. albicans higher counts in DS saliva (p = 0.03) showed association with elevated levels of IL-8 (p = 0.03) and IL-1α (p = 0.01). CRP levels were not different among groups (p = 0.74). DNA-DNA checkerboard analyses indicated typical periodontal pathogens below the detection threshold of 104 organisms on both denture and inflamed mucosal surfaces. The data suggest that DS is associated with elevation of salivary IL1 and IL-8 together with increased C. albicans. There was no evidence of systemic inflammation as measured by serum C-reactive protein levels.

关键词： Cytokines Serum C-Reactive Protein Denture C. albicans Stomatitis Salivary

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