Secondary thickening

The root anatomy of 12 Amaranthus taxa (Amaranthaceae) was studied. The internal structures were evaluated as an anatomical character to clarify the taxonomic complexity in the genus. Transactions of young roots of the studied species showed no variations.

8p schindler 30-12-2021 9 0   Download

The structure and development of successive cambia and its products were studied in the stems of the halophyte Sesuvium verrucosum Raf. The young stem has several collateral vascular bundles arranged in a circle and separated by interfascicular zones. The secondary thickening begins with the differentiation of fascicular and interfascicular cambia which give rise to secondary xylem, phloem and lignified cells.

6p schindler 30-12-2021 9 0   Download

Table 52-2 Description of Secondary Skin Lesions Lichenification: A distinctive thickening of the skin that is characterized by accentuated skin-fold markings. Scale: Excessive accumulation of stratum corneum. Crust: Dried exudate of body fluids that may be either yellow (i.e., serous crust) or red (i.e., hemorrhagic crust). Erosion: Loss of epidermis without an associated loss of dermis. Ulcer: Loss of epidermis and at least a portion of the underlying dermis. Excoriation: Linear, angular erosions that may be covered by crust and are caused by scratching.

5p konheokonmummim 30-11-2010 84 6   Download