高密度、集约化的凡纳滨对虾养殖常伴随病害的发生,但还不能确定能否利用对虾的肠道细菌差异来指示其健康状况.因此,我们分别采集了健康和发病养殖塘水样和对虾样品,利用Illumina Mi Seq测序技术测定细菌16S rRNA基因,研究细菌的群落结...高密度、集约化的凡纳滨对虾养殖常伴随病害的发生,但还不能确定能否利用对虾的肠道细菌差异来指示其健康状况.因此,我们分别采集了健康和发病养殖塘水样和对虾样品,利用Illumina Mi Seq测序技术测定细菌16S rRNA基因,研究细菌的群落结构和多样性.结果表明:细菌群落结构变异主要受水体中亚硝酸盐、叶绿素a和磷酸盐的影响.发病对虾肠道细菌群落多样性显著低于健康对虾.在健康和发病对虾肠道细菌中,运用响应比分析,我们筛选到了28个丰度差异显著的分类操作单元(OTUs),其中来源于放线菌纲、黄杆菌纲和芽孢杆菌纲的OTUs丰度在发病对虾肠道中显著降低,而隶属于梭状芽孢杆菌纲的OTUs丰度在发病对虾肠道显著增加.此外,我们挑选出61个指示物种,主要属于拟杆菌门、变形菌门、厚壁菌门、浮霉菌门和放线菌门.值得注意的是,它们能够区分样品的来源(水样或虾肠道)和健康状态.本研究为对虾病害预测和益生菌开发提供了理论依据.展开更多
Coconut,Cocos nucifera L.,is a tree that is cultivated for its multiple utilities,mainly for its nutritional and medicinal values.The various products of coconut include tender coconut water,copra,coconut oil,raw kern...Coconut,Cocos nucifera L.,is a tree that is cultivated for its multiple utilities,mainly for its nutritional and medicinal values.The various products of coconut include tender coconut water,copra,coconut oil,raw kernel,coconut cake,coconut toddy,coconut shell and wood based products,coconut leaves,coir pith etc.Its all parts are used in someway or another in the daily life of the people in the traditional coconut growing areas.It is the unique source of various natural products for the development of medicines against various diseases and also for the development of industrial products.The parts of its fruit like coconut kernel and tender coconut water have numerous medicinal properties such as antibacterial,antifungal,antiviral, antiparasitic,antidermatophytic,antioxidant,hypoglycemic,hepatoprotective,immunostimulant. Coconut water and coconut kernel contain microminerals and nutrients,which are essential to human health,and hence coconut is used as food by the peoples in the globe,mainly in the tropical countries.The coconut palm is,therefore,eulogised as ’Kalpavriksha’(the all giving tree) in Indian classics,and thus the current review describes the facts and phenomena related to its use in health and disease prevention.展开更多
文摘高密度、集约化的凡纳滨对虾养殖常伴随病害的发生,但还不能确定能否利用对虾的肠道细菌差异来指示其健康状况.因此,我们分别采集了健康和发病养殖塘水样和对虾样品,利用Illumina Mi Seq测序技术测定细菌16S rRNA基因,研究细菌的群落结构和多样性.结果表明:细菌群落结构变异主要受水体中亚硝酸盐、叶绿素a和磷酸盐的影响.发病对虾肠道细菌群落多样性显著低于健康对虾.在健康和发病对虾肠道细菌中,运用响应比分析,我们筛选到了28个丰度差异显著的分类操作单元(OTUs),其中来源于放线菌纲、黄杆菌纲和芽孢杆菌纲的OTUs丰度在发病对虾肠道中显著降低,而隶属于梭状芽孢杆菌纲的OTUs丰度在发病对虾肠道显著增加.此外,我们挑选出61个指示物种,主要属于拟杆菌门、变形菌门、厚壁菌门、浮霉菌门和放线菌门.值得注意的是,它们能够区分样品的来源(水样或虾肠道)和健康状态.本研究为对虾病害预测和益生菌开发提供了理论依据.
文摘Coconut,Cocos nucifera L.,is a tree that is cultivated for its multiple utilities,mainly for its nutritional and medicinal values.The various products of coconut include tender coconut water,copra,coconut oil,raw kernel,coconut cake,coconut toddy,coconut shell and wood based products,coconut leaves,coir pith etc.Its all parts are used in someway or another in the daily life of the people in the traditional coconut growing areas.It is the unique source of various natural products for the development of medicines against various diseases and also for the development of industrial products.The parts of its fruit like coconut kernel and tender coconut water have numerous medicinal properties such as antibacterial,antifungal,antiviral, antiparasitic,antidermatophytic,antioxidant,hypoglycemic,hepatoprotective,immunostimulant. Coconut water and coconut kernel contain microminerals and nutrients,which are essential to human health,and hence coconut is used as food by the peoples in the globe,mainly in the tropical countries.The coconut palm is,therefore,eulogised as ’Kalpavriksha’(the all giving tree) in Indian classics,and thus the current review describes the facts and phenomena related to its use in health and disease prevention.
