Plant Science: Plantae

The Plant List (TPL) was a working list of all known plant species produced by the botanical community in response to Target 1 of the 2002-2010 Global Strategy for Plant Conservation (GSPC). TPL has been static since 2013, but was used as the starting point for the Taxonomic Backbone of the World Flora Online (WFO), and updated information can be found at www.worldfloraonline.org.

United States Department of Agriculture

From a spider web to a flower, patterns in nature are everywhere around us. Patterns are a series of repeating shapes, colors or other forms. Humans are drawn to patterns and they decorate many common objects we use and wear. For thousands of years, people have recognized that patterns exist in nature there is ongoing research seeking to explain them. The exploration of patterns generally intersects with other sciences, including the study of math, animals, climate, and plants. Identifying and explaining these natural patterns can help us better understand our world.

The SAGA complex is an evolutionarily conserved transcriptional coactivator that regulates gene expression through its histone acetyltransferase and deubiquitylase activities, recognition of specific histone modifications, and interactions with transcription factors. Multiple lines of evidence indicate the existence of distinct variants of SAGA among organisms as well as within a species, permitting diverse functions to dynamically regulate cellular pathways. Our co-expression analysis of genes encoding human SAGA components showed enrichment in reproductive organs, brain tissues and the skeletal muscle, which corresponds to their established roles in developmental programs, emerging roles in neurodegenerative diseases, and understudied functions in specific cell types. SAGA subunits modulate growth, development and response to various stresses from yeast to plants and metazoans. In metazoans, SAGA further participates in the regulation of differentiation and maturation of both innate and adaptive immune cells, and is associated with initiation and progression of diseases including a broad range of cancers. The evolutionary conservation of SAGA highlights its indispensable role in eukaryotic life, thus deciphering the mechanisms of action of SAGA is key to understanding fundamental biological processes throughout evolution. To illuminate the diversity and conservation of this essential complex, here we discuss variations in composition, essentiality and co-expression of component genes, and its prominent functions across Fungi, Plantae and Animalia kingdoms. [ABSTRACT FROM AUTHOR]

A case study is presented on the indigenous peoples of British Columbia (BC's) plant management practices through examining what are referred to as culturally modified trees (CMTs) in BC. An overview of the BC indigenous peoples' relationship with western redcedar and yellow cedar, including their use of cedar in rituals, is provided. The BC indigenous peoples' creation of estuarine root gardens, where root crops were cultivated, is discussed.