Morphological Variation, Growth, and Yield of Tomato Plants Vegetatively Propagated by the Complete Decapitation Method
AbstractThe complete decapitation method (CDM), a new mass propagation technique in which adventitious shoots are regenerated from cut tomato (Solanum lycopersicum L.) stems, may induce variations similar to those observed in tissue culture. Morphological defect occurrence, growth, and fruit yield of CDM-regenerated clones were compared with those of plants produced from seed. Morphological defect frequencies of seedlings and clones were 3.5% and 6.0%, respectively. Leaf position of first fruit trusses was lower in clones than in seedlings; flower number, fruit set, and yield on first to third trusses were similar between clones and seedlings. The CDM-propagated vegetative clones are suitable for tomato nursery production.
Background ::: Spontaneously metastatic xenograft models of cancer are infrequent and the few that exist are resource intensive. In xenografts, caliper measurements can be used to determine primary tumor burden and response to therapy but in metastatic disease models determination of the presence of metastatic disease, metastatic burden, and response to therapy are difficult, often requiring serial necropsy. In this study we characterized the development of visceral metastases in a patient derived xenograft model (PDXM) using in vivo imaging.