The Influence of Air Spaces on the Three-Dimensional Shapes of Cells in Elodea Stems, and a Comparison with Pith Cells of Ailanthus

The Three‐dimensional Shape of Plant Cells and Its Relationship to Pattern of Tissue Growth

“…A range of six to twenty-six facets was obtained with a peak value and average of 14 and 14.0046 facets, respectively. This distribution compares favourably to that found by Hulbary (1944) for 150 cells in the pith of Ailanthus stems (Table 2, third column). No statistical test was made to compare the two sets of data since a sample of 150 cells is small for so broad a range and the pattern of growth of pith cells may not be precisely three-dimensional.…”

“…This study is an exploration of the 3-D problem and its interpretation of tissue growth from observed and calculated geometries. THREE-DIMENSIONAL MODEL Duffy (1951) lists probability distributions for the number of facets that were collected by her and other workers and it appears that there are two types of tissues, those with i-D growth as in the cortex of roots (Duffy, 1951) and those with 3-D growth such as is found in the pith of Ailanthus (Hulbary, 1944). A simple geometric model of cell shape was constructed by beginning with a rectangular block and sectioning it through a succession of cuts ( Fig.…”

On the Shapes of Cells in the Cambial Zone of Pinus silvestris L.

“…Meeuse (1941) and Van Iterson and Meeuse (1941) have reported the occurrence of cells with such a configuration in the root tubers of Asparagus Sprengeri and the hypodermal cells of the leaves of Rhoeo discolor. In consideration of the theoretical implications of this report a further analysis of these tissues has been made by Hulbary" (1946).…”

“…exist on the shapes of cambium cells. However, In four of the papers discussed by Matzke since tracheids are derived from cambium cells a (1946) (Marvin, 1939;Higinbotham, 1942;Dodd, comparison with the data supplied by Lewis (1935Lewis ( ) 1944and Hulbary, 1944), data concerning the concerning the shapes of tracheids in white pine kinds of faces were presented. In all of these data, might be warranted.…”

The Three‐dimensional Shape of Interphase Cells Within the Apical Meristem of Anacharis Densa,

“…Flint and Dr. P. Timothy Young for the preparation and examination of material. and result from the careful efforts of a number of research workers: 100 pith cells of Eupatorium purpareum (Marvin, 1939b); 100 petiole parenchyma cells of Angiopteris euecta (Higinbotham, 1942); 100 cells in the carpel vesicles of Citrus grandis (Dodd, 1944); 150 cells in the pith of Ailanthus glandulosa (Hulbary, 1944); 100 root parenchyma cells of Asparagus sprengeri (Hulbary, 1948); 100 non-chlorophyllous leaf parenchyma cells of Rhoeo discolor (Hulbary, 1948); 200 cells from the apical meristem of Coleus blumei (Holtzman, 1951); and 300 cells from the young cortex of tomato roots (Duffy, 1951). These last 1150 cells were all essentially unspecialized morphologically, and the similarity in the range and number of their faces indicates that similar factors were instrumental in determining their configurations.…”