. The developmental anatomy of Isoetes. Isoetes; Botany. 104 Plate 8 Stages in the development of leaf traces as seen in longitudinal sections. The axis of the shoot is vertical in all figures. A and drawing below. Continuity of peripheral region of the stele with the region of formation of procambium to the leaves. The section is median for a young leaf primordium (LP). The shoot apex is to the right, at the margin of the photo. The tangential walls of the cells beneath the leaf primordium are inclined inward. The cells marked 1 and 2 are for reference to the draw- ing of A that is below this
. The developmental anatomy of Isoetes. Isoetes; Botany. 104 Plate 8 Stages in the development of leaf traces as seen in longitudinal sections. The axis of the shoot is vertical in all figures. A and drawing below. Continuity of peripheral region of the stele with the region of formation of procambium to the leaves. The section is median for a young leaf primordium (LP). The shoot apex is to the right, at the margin of the photo. The tangential walls of the cells beneath the leaf primordium are inclined inward. The cells marked 1 and 2 are for reference to the draw- ing of A that is below this legend. The rectangles above the numbers in the drawing represent the appearance of cells 1 and 2 in transverse sections. For cell 1, the radial dimension is not greatly exaggerated in transverse section, but this is not true for cell 2. The tangential dimensions of the rectangles above the numbers in the drawing are representative of cells found in the appropriate locations in transverse sections. A, X 300, drawing, X 150. B. Primordium with ligule mother cell. The leaf trace (LT) slants inward. The shoot apex is off to the right. Pr indicates cells of the procambial core. X 370. C and D. Serial sections of a primordium (ca. P-) with a multicellular ligule. The leaf trace (LT) was in the initial stages of bending. X 340. E. Later stage in the bending of a leaf trace. The procambial leaf trace (LT) stains more deeply than the radial rows of procambial cells at the margin of the procambial core (Pr). X 460. F. Late stage in the bending of a leaf trace. The attachment of the leaf trace is not perfectly shown, but it can be seen that radial files of narrow cells occur along the base of the trace on its abaxial side. X 325. LP, leaf primordium; LT, leaf trace; Pr, cells of the procambial core; PSE, primary sieve Cf. A. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of
Size: 1609px × 1553px
Photo credit: © Central Historic Books / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookcollectionbiodiversity, booksubjectbotany
