Cryptochromes(CRYs)are photolyase-like bluelight receptors originally identified in Arabidopsis thaliana(Arabidopsis)and have since been identified across diverse evolutionary lineages.Cryptochromes not only transduce...Cryptochromes(CRYs)are photolyase-like bluelight receptors originally identified in Arabidopsis thaliana(Arabidopsis)and have since been identified across diverse evolutionary lineages.Cryptochromes not only transduce blue-light cues to the circadian clock but also maintain the temperature compensation of circadian clock.However,the precise mechanism by which CRYs integrate blue light signals into the circadian clock in Arabidopsis is still under investigation.This study revealed that,when blue light was filtered out from white light,the circadian period length in Col-0 was extended,but not in the cry1 cry2double mutant.This indicates that both blue light and CRYs are crucial for regulating the circadian rhythm.Furthermore,we discovered that CRY2 interacted with PSEUDORESPONSE REGULATOR 5(PRR5),a key component of the circadian clock under blue light,which suppressed PRR5's transcriptional inhibition ability on CCA1 and LHY.These findings illuminate the pathway through which blue light influences the circadian clock via the CRY2-PRR5 module.展开更多
猪繁殖与呼吸综合征（Porcine reproductive and respiratory syndrome，PRRS）又称“猪蓝耳病”，是由PRRS病毒（Porcine reproductive and respiratory syn-drome virus，PRRSV）引起的一种猪烈性传染病，具有传播速度快、传染性强、...猪繁殖与呼吸综合征（Porcine reproductive and respiratory syndrome，PRRS）又称“猪蓝耳病”，是由PRRS病毒（Porcine reproductive and respiratory syn-drome virus，PRRSV）引起的一种猪烈性传染病，具有传播速度快、传染性强、流行范围广、长期持续存在、长期免疫抑制等特点。自2006年6月全国暴发的高致病性PRRS给养猪企业造成了巨大的经济损失，PRRSV的优势流行毒株发生了变化，致病强度普遍高于大疫情出现之前，已成为影响养猪业发展的首要问题。展开更多
基金supported in part by the National Key R&D Program of China(2024YFA1306700)the National Natural Science Foundation of China(32330006,32150007,31825004,32200229,32170247)+1 种基金the Research Team Cultivation Program of Shenzhen University(2023DFT005to H.L.)the research fund from the Synthetic Biology Research Center of Shenzhen University。
文摘Cryptochromes(CRYs)are photolyase-like bluelight receptors originally identified in Arabidopsis thaliana(Arabidopsis)and have since been identified across diverse evolutionary lineages.Cryptochromes not only transduce blue-light cues to the circadian clock but also maintain the temperature compensation of circadian clock.However,the precise mechanism by which CRYs integrate blue light signals into the circadian clock in Arabidopsis is still under investigation.This study revealed that,when blue light was filtered out from white light,the circadian period length in Col-0 was extended,but not in the cry1 cry2double mutant.This indicates that both blue light and CRYs are crucial for regulating the circadian rhythm.Furthermore,we discovered that CRY2 interacted with PSEUDORESPONSE REGULATOR 5(PRR5),a key component of the circadian clock under blue light,which suppressed PRR5's transcriptional inhibition ability on CCA1 and LHY.These findings illuminate the pathway through which blue light influences the circadian clock via the CRY2-PRR5 module.
文摘猪繁殖与呼吸综合征（Porcine reproductive and respiratory syndrome，PRRS）又称“猪蓝耳病”，是由PRRS病毒（Porcine reproductive and respiratory syn-drome virus，PRRSV）引起的一种猪烈性传染病，具有传播速度快、传染性强、流行范围广、长期持续存在、长期免疫抑制等特点。自2006年6月全国暴发的高致病性PRRS给养猪企业造成了巨大的经济损失，PRRSV的优势流行毒株发生了变化，致病强度普遍高于大疫情出现之前，已成为影响养猪业发展的首要问题。
文摘为研究高致病性猪繁殖与呼吸综合征病毒(high pathogenic-porcine reproductive and respiratory syndrome virus,HP-PRRSV)感染猪后其血清病毒载量和体重增长的变化规律,以大白猪和通城猪的高代横交群体中72头健康仔猪为研究对象进行HP-PRRSV人工感染,观察临床症状,并在感染前和感染后第4、7、11、14、21、28、35天进行空腹采血、体重称量、血清分离以及病毒载量检测。结果显示:在感染第0~4天体重增长速度缓慢,第4~21天体重一直呈负增长、第7~11天体重减少量达最大值、第21~35天体重呈正增长;病毒载量在感染第4天达到峰值并持续到第7天,第7~35天病毒载量逐渐下降至6.62 lg copies/mL;感染第7天出现死亡,死亡个体主要集中在7~14 d,在第10天出现死亡高峰,第19天后基本稳定;依据第14天存活与否,将试验猪分为抗病和易感2个组,抗病组的病毒载量在第4、7、11天均显著低于易感组(P<0.05),该组的体重增长量在第4~7、7~11、11~14天均显著高于易感组(P<0.05)。上述结果表明,在感染过程中体重增长和病毒载量2个性状可作为预测PRRS抗病性的指示性状。
