Systematics of Arundinelleae and Andropogoneae subtribes Chionachninae, Dimeriinae and Germainiinae (Poaceae:Panicoideae) in Thailand

THESIS 9252This thesis has provided a comprehensive taxonomic account of tribe Arundinelleae, and subtribes Chionachninae, Dimeriinae and Germainiinae of the tribe Andropogoneae in Thailand. Complete floristic treatments of these taxa have been completed for the Flora of Thailand project. Keys to genera and species, species descriptions, synonyms, typifications, illustrations, distribution maps and Usts of specimens examined, are also presented. Fourteen species and three genera of tribe Arundinelleae, three species and two genera of subtribe Chionachninae, seven species of subtribe Dimeriinae, and twelve species and two genera of Germainiinae, were recorded in Thailand, of which Garnotia ciliata and Jansenella griffithiana were recorded for the first time for Thailand. Three endemic grasses, Arundinella kerrii, A. kokutensis and Dimeria kerrii were described as new species to science

SITE INDICATOR SPECIES FOR PREDICTING THE PRODUCTIVITY OF TEAK PLANTATIONS IN PHRAE PROVINCE, THAILAND

Site quality assessment is critically important in any tree planting activity as it may serve a range of management functions such as, optimizing productivity estimates of forest plantations. This study aimed to evaluate the site quality, using plant indicators species, for three teak plantations located in Northern Thailand belonging to the Forest Industry Organization (FIO). Twenty-four sample plots were chosen to cover all the growth classes within the age range of 6-39 years. The site index of teak was established by using the anamorphic technique which is based on dominant height and age at a base age of 30 years, divided into 3 site index classes as 24, 21, and 18, as good, moderate, and poor site quality, respectively. Associated species, the native species that are tree and shrub habits, were surveyed in the 24 plots and indicator species were classified using the Indicator Species Analysis (ISA) and Two Way Indicator Species Analysis (TWINSPAN). The relationship between indicator species and environmental factors was analyzed by the Generalized Linear Model (GLM). The associated species was classified into 76 species with 21 families. The results of ISA indicated the significant indicator species under the good site class were Streblus ilicifolius, Lagerstroemia floribunda, Dalbergia cana and Lagerstroemia calyculata; while Schleichera oleosa and Dalbergia nigrescens were presented under poor site class, respectively. The results from TWINSPAN supported Streblus ilicifolius, Lagerstroemia floribunda and Schleichera oleosa were obvious indicators.  Each indicator species distribution influenced by various relationships with environmental factors, which soil pH and N were the main factors to distribute all indicator species to 3 relationships. First, the indicator species positively associated with soil pH and negatively associated with N were Streblus ilicifolius and Dalbergia nigrescens. Second, the indicator species positively associated with soil pH and N were Lagerstroemia floribunda and Schileichera oleosa. Third, the indicator species negatively associated with soil pH and positively associated N were Dalbergia cana and Lagerstroemia calyculata. The GLM analysis revealed P, Ca and elevation influenced indicator species distribution. As of writing, this is the first study on species indicators for suitable sites of teak in Thailand. Meanwhile, in the absence of confirmatory studies, these indicators can be used as guide for farmers interested in planting teak. In bare lands, the farmer can apply these indicator species to determine the site quality based on the species’ past appearance

Arundinella kerrii and Dimeria kerrii , Two New Endemic Species from Thailand (Poaceae, Panicoideae)

Volume: 21Start Page: 149End Page: 15

record for Pterisanthes cissioides

www.mapress.com/phytotaxa

Filtering for the best policy: An economic evaluation of policy options for kidney replacement coverage in the Philippines

10.1111/nep.13830Nephrology262170-17

Multilocus phylogeny and phylogenomics of Eriochrysis P. Beauv. (Poaceae–Andropogoneae): taxonomic implications and evidence of interspecific hybridization

Species delimitation is a vital issue concerning evolutionary biology and conservation of biodiversity. However, it is a challenging task for several reasons, including the low interspecies variability of markers currently used in phylogenetic reconstructions and the occurrence of reticulate evolution and polyploidy in many lineages of flowering plants. The first phylogeny of the grass genus Eriochrysis is presented here, focusing on the New World species, in order to examine its relationships to other genera of the subtribe Saccharinae/tribe Andropogoneae and to define the circumscriptions of its taxonomically complicated species. Molecular cloning and sequencing of five regions of four low-copy nuclear genes (apo1, d8, ep2–ex7 and ep2–ex8, kn1) were performed, as well as complete plastome sequencing. Trees were reconstructed using maximum parsimony, maximum likelihood, and Bayesian inference analyses. The present phylogenetic analyses indicate that Eriochrysis is monophyletic and the Old World E. pallida is sister to the New World species. Subtribe Saccharinae is polyphyletic, as is the genus Eulalia. Based on nuclear and plastome sequences plus morphology, we define the circumscriptions of the New World species of Eriochrysis: E. laxa is distinct from E. warmingiana, and E. villosa is distinct from E. cayennensis. Natural hybrids occur between E. laxa and E. villosa. The hybrids are probably tetraploids, based on the number of paralogues in the nuclear gene trees. This is the first record of a polyploid taxon in the genus Eriochrysis. Some incongruities between nuclear genes and plastome analyses were detected and are potentially caused by incomplete lineage sorting and/or ancient hybridization. The set of low-copy nuclear genes used in this study seems to be sufficient to resolve phylogenetic relationships and define the circumscriptions of other species complexes in the grass family and relatives, even in the presence of polyploidy and reticulate evolution. Complete plastome sequencing is also a promising tool for phylogenetic inference.Fil: Welker, Cassiano A. D.. Universidade Federal do Rio Grande do Sul; BrasilFil: Souza Chies, Tatiana T.. Universidade Federal do Rio Grande do Sul; BrasilFil: Longhi Wagner, Hilda M.. Universidade Federal do Rio Grande do Sul; BrasilFil: Peichoto, Myriam Carolina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Nordeste. Instituto de Botánica del Nordeste. Universidad Nacional del Nordeste. Facultad de Ciencias Agrarias. Instituto de Botánica del Nordeste; ArgentinaFil: McKain, Michael R.. Donald Danforth Plant Science Center; Estados UnidosFil: Kellogg, Elizabeth Anne. Donald Danforth Plant Science Center; Estados Unido