检索结果-南通市图书馆

Postharvest Variations of Rice Physicochemical Traits and Volatile Compounds under Granary Conditions During Long-Time Storage

在线全文

学校读者我要写书评

暂无评论

Rice science 2023年第2期30卷 92-95,I0007-I0009页

作者： HU Hao LIU Xingquan HE Yukai JIN Jiande WU Fenghua huang shiwen ZHANG Jiaojiao College of Food and Health Zhejiang Agriculture and Forest UniversityHangzhou 311300China China National Rice Research Institute Hangzhou 310006China Zhejiang Province Grain Reserve Management Co.LTD Hangzhou 310006China

Rice quality is influenced by many factors,viz.,temperature,humidity,atmosphere and storage time.To uncover quality variations of rice after postharvest,we estimated the physicochemical properties and volatile compounds of an indica rice Zhongzheyou 8 under granary conditions(20ºC-25ºC in summer and 10ºC-15ºC in other seasons)for three years.

关键词： Traits humidity harvest

Different Hypotheses for Resistance Loss of Rice Varieties to Magnaporthe oryzae

在线全文

学校读者我要写书评

暂无评论

Rice science 2021年第1期28卷 11-12页

作者： Zhao Kehan huang shiwen China National Rice Research Institute Hangzhou 310006China

It is widely believed that a rice variety loses its resistance to rice blast after three to five years in commercial production due to the emergence of new Magnaporthe oryzae pathotypes(or physiological races)(Ou,1985).However,we believe that a resistant rice variety loses its resistance to M.oryzae not due to the emergence of new physiological races.We propose that pathogenic physiological races already exist in the natural environment,serving as potential physiological races.It is only because of the lack of appropriate environmental conditions,particularly the lack of a suitable rice host,on which such a race is unable to propagate widely and exists as an inferior race.However,when there is an appropriate rice host,the potential pathogenic physiological race can quickly proliferate to become the dominant physiological race,thus leading to the loss of blast resistance in resistant rice varieties.

关键词： Magnaporthe resistance physiological

Ustilaginoidea virens: A Fungus Infects Rice Flower and Threats World Rice Production

在线全文

学校读者我要写书评

暂无评论

Rice science 2019年第4期26卷 199-206页

作者： QIU Jiehua MENG Shuai DENG Yizhen huang shiwen KOU Yanjun State Key Laboratory of Rice Biology China National Rice Research Institute Hangzhou 310006 China Guangdong Province Key Laboratory of Microbial Signals and Disease Control/Integrative Microbiology Research Centre South China Agricultural University Guangzhou 510642China

Rice false smut disease, which is caused by the fungus Ustilaginoidea virens, is currently one of the most devastating rice fungal diseases in the world. Rice false smut disease not only causes severe yield loss and grain quality reduction, but also threatens food safety due to its production of mycotoxins. In this review, the most recent progresses regarding the life cycle, infection processes, genome and genetic diversity, pathogenic gene and disease resistance in rice were summarized in order to provide theoretical basis for the control of U. virens. We also proposed some future directions and key questions that need to be addressed for a better understanding of the molecular mechanism that leads to rice false smut disease and the prospects for sustainable control of rice false smut.

关键词： Ustilaginoidea virens rice false smut disease life cycle infection process pathogenesis gene disease resistance

阿维菌素与井冈霉素混配对水稻主要病虫害的防治效果

在线全文

学校读者我要写书评

暂无评论

浙江大学学报（农业与生命科学版） 2024年第2期50卷 308-316页

作者：邵美红程楚柯汉云黄世文李春寿建德市农业技术推广中心浙江杭州311600 中国水稻研究所浙江杭州311401 浙江省农业科学院作物与核技术利用研究所浙江杭州310021

随着生态和绿色农业建设不断推进,环保型低毒生物农药被广泛研发与利用。针对水稻主要病虫害,本研究探讨了不同有效成分用量阿维菌素和井冈霉素混配剂(以下简称阿•井混配剂)在室内试验和田间试验对水稻主要病虫害的防治效果。结果表明:... 详细信息

随着生态和绿色农业建设不断推进,环保型低毒生物农药被广泛研发与利用。针对水稻主要病虫害,本研究探讨了不同有效成分用量阿维菌素和井冈霉素混配剂(以下简称阿•井混配剂)在室内试验和田间试验对水稻主要病虫害的防治效果。结果表明:阿•井混配剂对毒杀水稻纹枯病菌、稻飞虱(白背飞虱和褐飞虱)、二化螟、三化螟、黑尾叶蝉有显著的增效作用。其增效作用可部分中和病原菌和害虫的抗药性,从而延长药剂的使用期。使用阿•井混配剂对稻纵卷叶螟和稻螟蛉的毒杀效果与单独使用阿维菌素时的毒杀效果相当。综上所述,生物农药阿维菌素和井冈霉素混配具有提高对水稻主要病虫害防控能力的潜力,并且属于绿色防治方法,值得大力推广应用。

关键词：阿维菌素井冈霉素混配防治效果水稻病虫害

维普期刊数据库博看期刊

Preparation of Enantiomerically Pure 1,1'-Bi-2-naphthols from 85% Cinchonine and 1,1'-Bi-2-naphtholboric Anhydride

在线全文

学校读者我要写书评

暂无评论

Wuhan University Journal of Natural Sciences 1998年第3期3卷 91-93页

作者： Xiong, Ying Shan, Zixing Cheng, Fuyong huang, shiwen Zhao, Dejie

A possibility of preparation of enantiomerically pure 1,1' bi 2 naphthols using an impure cinchonine has been examined. The solid and the mother liquor formed from the reaction of 1,1' bi 2 naphtholboric anhydride and 85 % cinchonine in toluene could give optically pure (S) ( ) and (R) (+) 1,1' bi 2 naphthol after acidification and kinetic crystallization, the overall yields were 40 % and 28 %, respectively.

关键词： bi 2 naphthol enantiomer preparation cinchonine resolution

Infection and Colonization of Pathogenic Fungus Fusarium proliferatum in Rice Spikelet Rot Disease

在线全文

学校读者我要写书评

暂无评论

Rice science 2019年第1期26卷 60-68页

作者： SUN Lei WANG Ling LIU Lianmeng HOU Yuxuan XU Yihua LIANG Mengqi GAO Jian LI Qiqin huang shiwen College of Agronomy Guangxi University State Key Laboratory of Rice Biology China National Rice Research Institute

Rice spikelet rot disease(RSRD), caused by Fusarium proliferatum, is an emerging disease. So far, the effects of diseased rice floral organs as well as the primary infection sites and stages of this pathogen are not determined. We investigated changes in the floral organs, along with the infection processes of the pathogen in plants inoculated with F. proliferatum and labelled with a green fluorescent protein during different growth stages of rice. The results showed that RSRD is not a systemic infectious disease, which has negative effects on the fertility of the infected rice. F. proliferatum caused brown colored anthers, crinkled pistils and ovaries, pollen grain deformities and anther indehiscence. The number of pollen grains on the stigmas decreased significantly in the infected spikelets, and the anther dehiscence and seed-setting rate successively declined by 69% and 73%, respectively, as a result of the infection. The initial infection stage occurred at the pollen cell maturity stage, and the primary invasion sites were determined to be the anthers of rice. It was noted that the pathogen mainly damaged the pollen cells, and with the exception of the filaments, proceeded to colonize the pistils and endosperm.

关键词： Fusarium proliferatum rice spikelet rot disease green fluorescent protein infection process infection stage invasion site

Identification and Evaluation of UV-Tolerant Streptomyces araujoniae Strain Isolated from Tibet Plateau Soil as Biocontrol Agent Against Rice Blast

在线全文

学校读者我要写书评

暂无评论

Rice science 2020年第5期27卷 359-362,I0013-I0017页

作者： Liu Lianmeng Zhao Yuan Lu Jiying Liang Mengqi Sun Lei Gao Jian Wang Ling Hou Yuxuan huang shiwen Cstate Key Laboratory of Rice Biology China National Rice Research InstituteHangzhou 310006China College of Plant Science and Technology Huazhong Agricultural UniversityWuhan 430070China Agricultural College Guangxi UniversityNanning 530003China Plant Protection Station of Yulin Yulin 537000China Shaoxing Academy of Agricultural Sciences Shaoxing 312000China

Rice blast is the most important and destructive crop disease in rice paddies and poses a continued threat to the production of rice(Rossman et al,1990;Khush,2005;Wang et al,2018;Chen et al,2019).Biological control is given increasing attentions on the control of rice blast for its outstanding advantages,such as safety,low-cost,and sustainability and environmentally friendly attributes.Streptomyces Waksman&Henrici is an important actinomycete genus that is well known for its biological control potential.S.araujoniae is a relatively new species and known for its antagonistic effects against many phytopathogenic fungi(da Silva et al,2013).However,there is no report about the antagonistic efiect of S.araujoniae on Magnaporthe oryzae,much less the disease control effects at the field experiment level.

关键词： Plateau continued control

纳米Ag修饰S掺杂g-C_(3)N_(4)的制备及其光催化抗菌性能

在线全文

学校读者我要写书评

暂无评论

人工晶体学报 2024年第6期53卷 1034-1041页

作者：祁君李嘉乐胡珊于小凤廖薇星黄世文徐秀泉江苏大学药学院镇江212013 江苏大学环境与安全工程学院镇江212013 亳州学院中药学院亳州236800

光催化灭活是公认的控制病原微生物最具前景手段之一。本文以尿素和硫代巴比妥酸为起始原料,通过热聚合反应制备S掺杂g-C_(3)N_(4)(SCN),随后采用光还原法将Ag纳米粒负载于SCN表面获得新颖的可见光响应型Ag/SCN抗菌材料。对所制备纳米... 详细信息

光催化灭活是公认的控制病原微生物最具前景手段之一。本文以尿素和硫代巴比妥酸为起始原料,通过热聚合反应制备S掺杂g-C_(3)N_(4)(SCN),随后采用光还原法将Ag纳米粒负载于SCN表面获得新颖的可见光响应型Ag/SCN抗菌材料。对所制备纳米材料进行XRD、SEM、TEM、XPS及UV-Vis DRS表征,并深入探讨其在可见光下灭活大肠杆菌(E.coli)的性能和机制。结果表明,Ag纳米粒均匀且牢固地负载在SCN表面,纳米材料表现出显著增强的可见光响应能力。当负载量为6%时,Ag/SCN-6呈现出最佳的光催化灭菌活性,60 min内能够将6.2 lg CFU·mL^(-1)的E.coli全部灭活。自由基捕获实验结果表明,超氧自由基(·O-2)是灭活过程中最主要活性物种,它协同光生空穴(h+)和羟基自由基(·OH)主导了光催化抗菌的进程。

关键词： g-C_(3)N_(4) S掺杂纳米Ag修饰光催化灭活机理

黄根多糖激活Nrf2对博来霉素致小鼠肺纤维化的保护作用

同方期刊数据库博看期刊评论

在线全文

学校读者我要写书评

暂无评论

右江民族医学院学报 2024年第3期46卷 336-342页

作者：欧阳怡佩黄艳郑凯姚鸿飞黄世稳右江民族医学院基础医学院广西百色533000

目的探讨黄根多糖(polysaccharide of Prismatomeria tetrandra,PSPT)是否通过激活Nrf2发挥抗肺纤维化(Pulmonary fibrosis,PF)作用。方法通过气管内滴注博来霉素(Bleomycin,BLM)创建小鼠肺纤维化模型,随机分为对照组,BLM组,PSPT低、中、高(40 mg/kg、100 mg/kg、250 mg/kg)剂量组,吡非尼酮(Pirfenidone,PFD)组(200 mg/kg),分别根据小鼠体重灌胃给药或等量的生理盐水,给药28 d后取肺组织标本,H&E、Masson染色检测肺纤维化程度;碱水解法测定肺组织中羟脯氨酸(HYP)水平;RT-qPCR及免疫荧光法检测肺组织中Nrf2的mRNA及蛋白表达水平。结果与对照组比较,模型组肺组织损伤及纤维化显著。与模型组比较,PSPT各剂量组及PFD组炎症反应及纤维化影响有所减轻;各给药组HYP水平显著降低(P<0.001);PSPT中、高剂量组Nrf2的mRNA水平明显升高(P<0.01);PSPT高剂量组Nrf2转录因子蛋白水平显著提高(P<0.001)。结论PSPT可能通过激活Nrf2表达来保护细胞免受氧化损伤,从而促进Nrf2在细胞核内的积累,增加抗氧化酶活性,进而通过Nrf2抑制氧化应激而发挥抗肺纤维化作用。

关键词：肺纤维化博莱霉素黄根多糖