qGW11a/OsCAT8,encoding an amino acid permease,negatively regulates grain size and weight in rice

Grain size is a key factor influencing grain weight in rice.In this study,a chromosome segment substitution line(CSSL9-17)was identified,that exhibits a significant reduction in both grain size and weight compared to its donor parent 93-11.Further investigation identified two quantitative trait loci(QTL)on chromosome 11,designated qGW11a and qGW11b,which contribute to 1000-grain weight with an additive effect.LOC_Os11g05690,encoding the amino acid permease OsCAT8,is the target gene of qGW11a.Overexpression of OsCAT8 resulted in decreased grain weight,while OsCAT8 knockout mutants exhibited increased grain weight.The 287-bp located within the OsCAT8 promoter region of 93-11 negatively regulates its activity,which is subsequently correlated with an increase in grain size and weight.These results suggest that OsCAT8 functions as a negative regulator of grain size and grain weight in rice.

图书馆绿色低碳发展实现路径研究

文章利用聚类分析法和内容分析法,分析图书馆绿色低碳发展现状,发现目前的图书馆绿色低碳发展研究主要集中在绿色图书馆可持续发展与建筑节能、绿色管理与绿色服务、环境素养教育、数字图书馆绿色低碳建设等方面。最后,基于图书馆事业“五要素”,提出图书馆绿色低碳发展的实现路径包括实践路径、管理制度与政策路径、技术路径,以期为图书馆可持续发展的深入探究提供借鉴。