Use Of Physiological Characteristics Research Articles

Use of physiological characteristics to identify genotypes of arabic coffee tolerant to Meloidogyne paranaensis

Objetivou-se avaliar o uso de caracteristicas fisiologicas, na identificacao de genotipos tolerantes ao Meloidogyne paranaensis, em areas sujeitas ao deficit hidrico. O experimento foi instalado com dois genotipos de Coffea arabica L.: 16 (MG 0179-1 R1) e 28 (MG 0179-3 R1) e duas cultivares: IPR-100 (testemunha resistente) e Mundo Novo IAC 379-19 (testemunha suscetivel), em delineamento de blocos casualizados com cinco repeticoes. Foram avaliados a populacao de M. paranaenses , producao, o diâmetro de copa, altura de planta, vigor vegetativo, potencial hidrico antemanha (ψ am ), a fotossintese liquida ( A ), a condutância estomatica ( g s ), transpiracao ( E ), temperatura foliar (TF) e eficiencia do uso da agua (EUA) e parâmetros de fluorescencia da clorofila a . Os genotipos 16, 28 e IPR100 apresentaram maior desenvolvimento vegetativo e maior producao do que o genotipo Mundo Novo, com destaque para o genotipo 28. Verificou-se maior potencial hidrico nos genotipos 16, 28 e IPR-100 comparados a cv. Mundo Novo. Entretanto, os genotipos nao apresentaram diferencas quanto as trocas gasosas. De acordo com os parâmetros de fluorescencia da clorofila a , o genotipo 28 apresentou melhor desempenho fotoquimico e capacidade de aclimatacao ao deficit hidrico. Pelas caracteristicas fisiologicas identificam-se genotipos tolerantes ao Meloidogyne paranaensis, em areas sujeitas ao deficit hidrico, com destaque para a analise de fluorescencia da clorofila a que apresenta potencial para avaliacoes em larga escala.

The use of physiological characteristics for comparison of organic compounds phytotoxicity

The influence of intact (FLT) and photomodified (phFLT) fluoranthene (0.05, 0.5 and 5μmoll−1) and herbicide Basagran (5, 20, 35 and 50nmoll−1) on the germination, growth of seedlings and photosynthetic processes in pea plants (Pisum sativum L., cv. Garde) was investigated. The germination was significantly inhibited already by the lowest concentration (0.05μmoll−1) of FLT and phFLT, while Basagran caused inhibition only in higher concentrations (35 and 50nmoll−1). The growth of roots was significantly inhibited by higher concentration 5μmoll−1 of both FLT and phFLT and the shoot of seedlings was significantly influenced only by photomodified form. The length of root and shoot was inhibited already by concentration 5nmoll−1 of Basagran. Organic compounds applied on chloroplasts suspension influenced primary photochemical processes of photosynthesis. In chlorophyll fluorescence parameters, the significant increase of F0 values and the decrease of FV/FM and ΦII values by application of FLT (0.5 and 5μmoll−1) and phFLT (0.05, 0.5 and 5μmoll−1) was recorded. The maximum capacity of PSII (FV/FM) was influenced by the highest (50nmoll−1) and the effective quantum yield of PSII (ΦII) already by the lowest (5nmoll−1) concentration of Basagran. Hill reaction activity decreased and was significantly inhibited by higher concentration (0.5 and 5μmoll−1) of FLT and phFLT and already by the lowest concentration (5nmoll−1) of Basagran.

Determining the Intention to Use Biometric Devices

Protection of physical assets and digital information is of growing importance to society. The need for development and use of security technologies is ever increasing. As with any new technology, user acceptance of new software and hardware devices is often hard to gauge and policies to introduce and ensure adequate and correct usage of such technologies are often lacking. Security technologies have widespread applicability to different organizational contexts that may present unusual and varied adoption considerations. This study adapts the technology acceptance model and extends it to study the intention to use security devices, more specifically biometrics, across a wide variety of organizational contexts. Due to the use of physiological characteristics, biometrics present unique adoption concerns. The extension of the technology acceptance model for biometrics is useful, as biometrics encompass many of the same adoption concerns as traditional security devices, but include a level of invasiveness that is obvious to the user. Through the use of vignettes, this study encompasses a systematically varied set of usage contexts for biometric devices to provide a generalizable view of the factors impacting intention to use over all categories of situational contexts of the device’s use. The technology acceptance model is extended in this study to include constructs for perceived need for privacy, perceived need for security and perceived physical invasiveness of biometric devices as factors that influence intention to use. The model is shown to be a good predictor of intention to use biometric devices and implications of the results for biometric and security technology acceptance is discussed.

Mortality of White-Tailed Deer Fawns in South-Central Iowa

Three controlled experiments were conducted on captive white-tailed deer (Odocoileus virginianus) to determine the response of blood levels of nonesterified fatty acids (NEFA), individual ketone bodies, and cholesterol to differences in dietary energy intake. In two long-term experiments (>30 days), deer on restricted energy intake exhibited declining 3-hydroxybutyrate levels over time that were usually lower than those of deer fed at a higher rate of energy intake. Deer fasted for 10 days had higher NEFA, cholesterol, and acetone and lower f-hydroxybutyrate concentrations than ad libitum-fed deer. Only j-hydroxybutyrate tended to vary consistently with dietary energy intake. J. WILDL. MANAGE. 49(2):380-385 Considerable research has been conducted on the use of physiological characteristics to determine nutritional status of wild cervids. Blood urea nitrogen has been shown to vary directly with protein intake when energy intake is constant (Kirkpatrick et al. 1975), but indices of energy intake suitable for use in the field have not been found. The purpose of this study was to determine the relationship between relative energy status and resulting concentrations of nonesterified fatty acids (NEFA), cholesterol, and individual ketone bodies in white-tailed deer. We hypothesized that with limited energy intake, fat would be mobilized, fatty acids would become the main oxidative substrate, and metabolites from fatty acid oxidation would This content downloaded from 157.55.39.163 on Wed, 23 Nov 2016 04:31:49 UTC All use subject to http://about.jstor.org/terms

Changes in Taxonomy and Nomenclature of Important Genera of Plant Pathogens

We plant pathologists don't care how fungi copulate, we want to know how they eat! This sentence, with one earthy verb substituted, has stuck with me since I heard George McNew's lectures at Cornell in the early 19508. There is more than a kernel of truth in the assertion that until the 19508 taxonomic mycologists had been preoccupied with sex and were not making sufficient use of physiological characteristics in broadly based biosystematics. There had been an undue emphasis on the sexual state in classification most particularly in textbooks, but beginning in the 19508 the asexual state was to progress to a level of equality. Today, certainly, one would use character­ istics of all parts of the fungus derived by as many disciplines as one can master (including how fungi eat) to develop a broadly based natural classifi­ cation. At the risk of losing the audience after one paragraph, some attention to definitions is essential. The original terms sexual and asexual stages were supplanted by states, because it was clear that many conidial fungi did not progress by stages into a sexual stage. The terms perfect state and imperfect state became current usage, and ,they are still used in the International Code of Botanical Nomenclature (29), which is referred to herein as the Code (29). Recently three terms were proposed-by Hennebert & Weresub (15): anamorph (imperfect state, often conidial)i teleomorph [perfect state, exclu­ sive of anamorph(s»), ap.d holomorph for the entire teleomorph-anamorph entity. Hughes (17) proposed the useful term'synanamorph to indicate the situation where more than one anamorph is recognized for a species.