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Ferris, R G, 2793262
No full textThis record was harvested from a previous catalogue system and will be withdrawn in 2025. Information in this record may be superseded or incomplete. Visit this record in UMA's new catalogue at: https://archives.library.unimelb.edu.au/nodes/view/384930Surname: FERRIS. Given Name(s) or Initials: R G. Military Service Number or Last Known Location: 2793262. Missing, Wounded and Prisoner of War Enquiry Card Index Number: SEA-4836.230672
Item: [2016.0049.17223] "Ferris, R G, 2793262
Increased root growth in elevated CO2: a biophysical analysis of root cell elongation
No full textA biophysical analysis of root expansion was conducted in four chalk downland herbs (Sanguisorba minor Scop., Lotus corniculatus L., Anthyllis vul-neraria L. and Plantago media L.) exposed to either ambient or elevated CO2in controlled environment cabinets. Measurements of fine (F) and extra-fine (EF) root extension rate (RER), water relations, and cell wall tensiometric extensibility revealed differences in the diurnal pattern of root growth between species. After 35 d of exposure to elevated CO2, RER of both F and EF roots increased significantly in darkness and on illumination for S. minor, whilst for A. vulneraria (EF roots only) and L. corniculatus a significant increase occurred at night whereas for P. media a significant increase occurred during the day. Cells measured in the zone of elongation were longer in all species exposed to elevated CO2. Water potential ({Psi}), solute potential ({Psi}), turgor pressure (P), yield turgor (Y) and effective turgor (Pe) were measured by stress-relaxation of excised root tips placed in psychro-meters. Solute potentials decreased significantly for all species following exposure to elevated CO2. In S. minor and L. corniculatus, P and Pe, respectively, were higher in elevated CO2. No significant effects of CO2 on Y were observed (not shown). Root cell wall tensiometric extensibility, measured as % plasticity, increased in all species exposed to elevated CO2. These results suggest that root growth is enhanced following increased cell expansion and that increased P and cell wall tensiometric extensibility are both important for root growth in elevated CO2
Stomatal characteristics of four native herbs following exposure to elevated CO2
No full textContrasting effects on the stomatal index (SI), stomatal density, epidermal cell size and number were observed in four chalk grassland herbs (Sanguisorba minor Scop., Lotus corniculatus L., Anthyllis vulneraria L. and Plantago media L.) following exposure to elevated carbon dioxide concentrations (CO2) in controlled environment growth cabinets. SI of S. minor increased for both leaf surfaces, whilst in A. vulneraria and P. media SI decreased on one surface only. In L. corniculatus , no differences in SI were observed as epidermal cell density changed in parallel with stomatal density. In L. corniculatus and S. minor stomatal density increased on both surfaces, whereas in P. media it decreased; in A. vulneraria stomatal density decreased on the abaxial leaf surface alone following exposure to elevated CO2. In the latter three species, SI changed because stomatal density did not change in parallel with epidermal cell density. The results suggest elevated CO2 is either directly or indirectly affecting cell differentiation and thus stomatal initiation in the meristem.In S. minor and P. media leaf growth increased in elevated CO2, because of increased cell expansion of epidermal cells, whereas in L. corniculatus, epidermal cell size decreased and greater leaf growth was because of an increase in epidermal cell divisions. In A. vulneraria, leaf size did not change, but increased cell expansion on the adaxial surface suggests CO2 affects leaf surfaces differently, either directly or indirectly at the cell differentiation stage or as the leaf grows.These results suggest component species of a plant community may differ in their response to elevated CO2. Predicting the effect of environmental change is therefore difficult.Copyright 1994, 1999 Academic PressElevated CO2, Sanguisorba minor (salad burnet), Lotus corniculatus (birdsfoot trefoil), Anthyllis vulneraria (kidney vetch), Plantago media (hoary plantain), stomatal index, stomatal density, epidermal cell siz
Going Beyond Counting First Authors in Author Co-citation Analysis
Full text linkThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
Variations on the Author
Full text link“Variations on the Author” discusses two of Eduardo Coutinho’s recent films (Um Dia na Vida, from 2010, and Últimas Conversas, posthumously released in 2015) and their contribution to the general question of documentary authorship. The director’s filmography is characterized by a consistent yet self-effacing form of authorial self-inscription: Coutinho often features as an interviewer that rather than express opinions propels discourses; an interviewer that is good at listening. This mode of self-inscription characterizes him as an author who is not expressive but who is nonetheless markedly present on the screen. In Um Dia na Vida, however, Coutinho is completely absent form the image, while Últimas Conversas, on the contrary, includes a confessional prologue that moves the director from the margins to the center of his films. This article examines the ways in which these works stand out in the filmography of a director who offers new insights into the notion of cinematic authorship
Appropriate Similarity Measures for Author Cocitation Analysis
Full text linkWe provide a number of new insights into the methodological discussion about author cocitation analysis. We first argue that the use of the Pearson correlation for measuring the similarity between authors’ cocitation profiles is not very satisfactory. We then discuss what kind of similarity measures may be used as an alternative to the Pearson correlation. We consider three similarity measures in particular. One is the well-known cosine. The other two similarity measures have not been used before in the bibliometric literature. Finally, we show by means of an example that our findings have a high practical relevance.information science;Pearson correlation;cosine;similarity measure;author cocitation analysis
Leaf area is stimulated in Populus by free air CO2 enrichment (POPFACE), through increased cell expansion and production
No full textThe effects of free-air CO2 enrichment (FACE) on leaf growth in Populus, was studied. For the first time in field conditions, both the production and expansion of leaf cells were shown to be sensitive to atmospheric carbon dioxide. Leaf area expansion rate and final leaf size were stimulated under FACE for three species (Populus x euramericana (I-214), P. nigra (Jean Pourtet) and P. alba (2AS-11), with the largest effect observed for P. x euramericana (61%). In this species and in P. nigra, both epidermal cell size and cell number were increased, whereas for P. alba, only cell production was increased in FACE. Two findings suggest that changes in the cell wall may be important in explaining larger leaf cells in FACE: (i) Leaf cell wall extensibility of rapidly growing leaves increased in all species in FACE; and (ii) an increase in xyloglucan endotransglycosylase activity, a cell wall-loosening enzyme, was increased in FACE and associated with leaf growth rate. The results suggest that the mechanisms by which FACE promotes leaf growth differ, depending on species. Despite this, increases in final leaf size provide an important component driving increased biomass accumulation in POPFACE, during this first year of rapid growth, prior to canopy closure. The question as to whether these effects are the result of a direct response to CO2, or are driven indirectly through substrate availability remains unresolved, although evidence from the literature suggests that the latter mechanism is most likely
Food quality and future market potential for plantain, plantain hybrids, and cooking bananas in West Africa
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