Viburnum spp.: examining the relationship between greenhouse-growth studies for heat and drought tolerance to determine correlation to landscape survival

Doctor of PhilosophyDepartment of Horticulture and Natural ResourcesCheryl R. BoyerThree studies were designed to evaluate Viburnum spp. and their physiological adaptation to drought, heat, and other environmental stresses found in the Great Plains, specifically Kansas. Nursery crop growers, landscape contractors, and consumers desire low-maintenance landscapes with plants suited to their environment. The Great Plains can be a challenging environment for ornamental landscape plants. Viburnum plants were potted into 2-gal (6.3 L) containers during the summer of 2012 with field trials installed Fall 2012. Field-study sites were selected to capture variability in precipitation and temperature across Kansas. Field trials in Eastern Kansas had greater survival. Shaded sites resulted in larger plants and greater survival. Plants designated for greenhouse drought and heat trials were overwintered in an unheated hoop-house the winter of 2012. Drought and heat trial cultivars were selected based on performance in field-trials as well as one Southern ecotype spp. for comparison. Drought and heat trials were conducted within a controlled greenhouse environment (Manhattan, KS) during June 2013 and April 2014, respectively. Plants acclimated in a greenhouse maintained at 25C/18C (77F/64F; day/night) for 28 days and were watered as needed until treatments were initiated. Viburnum dentatum, V. nudum, and V. tinus were exposed to both heat and drought separately. Results indicate that V. nudum responded to drought stress by reducing biomass, though photosynthetic capacity was not significantly affected. Viburnum dentatum was able to maintain similar shoot growth with moderate drought (MD) and severe drought (SD), while root growth significantly declined. Whole plant responses to increased day/night temperatures during acclimation prior to temperature curve measurements resulted in growth of all species slowing compared to control plants. All acclimated plants exhibited increased temperature optimum for Pnet with a less severe rate of increase and decline when compared to control. Viburnum dentatum and V. nudum were species which performed well in all studies and could be recommended for use in the Great Plains

The assessment of older drivers' capabilities: a review of the literature

Notes: For the GM/US DOT project entitled: Improvement of Older Driver Safety Through Self-EvaluationFull Text: http://www.umtri.umich.edu/library/pdf/1998-24.pdfGeneral Motors Corporation, Warren, Mich.http://deepblue.lib.umich.edu/bitstream/2027.42/1245/2/91182.0001.001.pd

Genetic variation and adaptation of white birch populations across Canada

Trees adapt to local climates, however growing concern surrounding climate change has generated predictions suggesting mass extinction or redistribution of taxa across the landscape. A lack of redistribution will result in species inhabiting suboptimal conditions for growth and survival. Current reforestation efforts are to understand how species will respond to different climates. Seed representing twenty-one white birch (Betula papyrifera Marsh.) populations were collected, grown and planted in a common garden study. Populations were observed for height, root collar diameter (RCD) and survival percentage. There was a significant effect of population on each growth variable. Survival had a positive correlation with height and RCD growth (May to September) (Pearson’s r = 0.828 and 0.660 respectively). Summer temperature had a strong relationship to each measured trait (r2 = 0.326 to 0.682 respectively). The second set of observations was bud flush, bud cessation and leaf yellowing. Bud flush observations began in early May and categorized bud development into six stages from dormant to fully flush. Bud cessation commenced in the first week of September every four days until bud set requirements were met. Leaf yellowing was observed simultaneously with bud cessation until 50% leaf yellowing was achieved. These traits represent phenological responses to temperature and photoperiod. There was a significant effect of population on each variable. Bud flush had a strong negative relationship with height growth, RCD growth and survival (r = -0.735, -0.693 and -0.539 respectively). Bud set influenced season length (Julian days), which had a positive correlation to height growth, RCD growth and survival (r = 0.568, 0.407 and 0.537 respectively). Leaf yellowing also showed a positive correlation to height growth and survival (r = 0.443 and .590 respectively). Principal component analysis was utilized to summarize the 21 white birch populations in regards to their growth and phenological responses to the common garden study. Principal component analysis produced two components, which represented 24.2% and 16.61% of the variation respectively. No definitive titles were given to each principal component. Temperature was a main predictor of growth and phonological responses during the study. Summer and winter temperatures, along with growing degree days (a function of temperature), were influential in predicting both growth and phenological responses

Official Register of the United States, containing a list of the officers and employes in the Civil, Military, and Naval Service on the first of July, 1893; together with a list of vessels belonging to the United States. Volume II, Pt. 2 of 2.

Official Register of the U.S. 1 July. HMD 29 (pts. 1 and 2), 53-2. v2-3. 2779p. [3230-3231] Lists all employees of the Indian service

Briófitas em floresta nebular do Parque Estadual Pico do Moroumbi, Paraná, Brasil

Orientador : Dr. Denilson Fernandes PeraltaDissertação (mestrado) - Universidade Federal do Paraná, Setor de Ciências Biológicas, Programa de Pós-Graduação em Botânica. Defesa: Curitiba, 24/03/2016Inclui referências : f. 20-24;83-86;98-100;113-118Resumo: A distribuição da brioflora nas florestas tropicais demonstra em geral que a diversidade varia consideravelmente em relação a altitude. O presente estudo objetivou realizar o levantamento da brioflora em Floresta Ombrófila Densa Alto Montana do Parque Estadual Pico do Marumbi, estado do Paraná, Brasil. As coletas foram realizadas de março de 2014 a junho de 2015, entre 1.000 e 1.500 m de altitude. Foram analisadas 1.368 amostras de briófitas, e também 28 árvores, cada uma dividida em 6 zonas. A listagem florística apresentou 364 espécies, sendo 187 espécies de musgos (35 famílias, 85 gêneros), 175 hepáticas (22 famílias, 58 gêneros) e dois antóceros (1 família, 2 gêneros). Os táxons encontrados correspondem a 40% da brioflora do Paraná e 24% no Brasil. Esta listagem apresenta ainda, 91 espécies como novas ocorrências para o estado. Esta dissertação está organizada em uma introdução geral e quatro capítulos: o capítulo I apresenta a listagem florística e a distribuição brasileira das espécies de Floresta Nebular, o capítulo II apresenta novas ocorrências de espécies de briófitas para o estado do Paraná, o capítulo III trata de uma espécie nova, esta apresenta o peristômio completo, sendo então possível caracterizar e descrever esta estrutura importantíssima na caracterização das espécies de Bryaceae, para o gênero Brachymenium. E o capítulo IV caracteriza as briófitas ocorrentes quanto à composição de espécies, zonação vertical do forófito e composição da comunidade de briófitas entre margem/interior da Floresta Nebular. Este trabalho traz como contribuições, uma nova espécie para a ciência, a ampliação da distribuição das espécies pouco conhecidas no Brasil e, apresenta a primeira caracterização ecológica das espécies ocorrentes em Floresta Nebular no país. Esses resultados mostram que a área do Parque é prioritária para manutenção e conservação da Biodiversidade de briófitas do BrasilAbstract: The distribution of bryoflora in tropical forests show that diversity, in general, varies considerably in height differences. This study aimed to survey the bryoflora in Pico Marumbi State Park Dense High Mountain Ombrophylous Forest, PR, Brazil. Samples were collected from March 2014 to June 2015, between 1.000 and 1.500 m height. 1.368 samples were analyzed and 28 trees, each divided into 6 zones. The floristic list showed 364 species, being 187 species of mosses (35 families, 85 genera), 175 liverworts (22 families, 58 genera) and two hornworts (1 family, 2 genera). The found taxa correspond to 40% of the Paraná bryoflora and 24% in Brazil. Still, this list presents 91 species as new records for the state.This paper is organized as a general introduction and four chapters: Chapter I presents the floristic list and the Brazilian nebular forest's species distribution, chapter II presents new records of species for the state of Paraná, Chapter III deals a potential new specie, it has a complete peristome, being then possible to characterize and describe this important structure in the characterization of species Bryaceae, for Brachymenium genus. And Chapter IV features the occurring bryophytes as species composition, altitudinal zonation in the phorophyte and composition margin/interior of the forest. This work has as its contributions, a new species for science, expanding the distribution of poorly known species in Brazil and presents the first ecological characterization of species occurring in cloud forest in the country. These results show that the area of the park is a priority for maintenance and conservation of the biodiversity of bryophytes in Brazil

F. Robert Gartner Papers

This collection is composed of materials created by F. Robert Gartner in relation to his research on range management and prescribed burning, activities, presentations, and writings

Estudo comparativo dos mecanismos de resistência à secura de alguns porta-enxertos do género prunus e a sua aplicaçäo ao melhoramento

Tese de Doutoramento em Ciências Agrárias, Unidade de Ciências e Tecnologias Agrárias, Universidade do Algarve, 1997Neste trabalho estudou-se o comportamento de porta-enxertos de Prunus com diferente sensibilidade ao défice hídrico, enxertados e não enxertados, a fim de identificar algumas características com interesse para a aplicação à selecção de porta-enxertos adaptados a condições hídricas limitantes.The behaviour of grafted and non grafted Prunus rootstocks with different water stress resistance were studied to identify some characteristics for plant breeding in restrictive water conditions