The plant vascular system provides transport and support capabilities that are essential for plant growth and development, yet the mechanisms directing the arrangement of vascular bundles within the shoot inflorescence stem remain unknown. We used computational and experimental biology to evaluate the role of auxin and brassinosteroid hormones in vascular patterning in Arabidopsis. We show that...

The molecular mechanisms that control the ordered patterning of vascular tissue development in plants are not well understood. Several models propose a two-component system for vascular differentiation. These components include an inducer of vascular tissue development and an inhibitor that prevents the formation of vascular bundles near pre-existing bundles. We have identified two recessive al...

the purpose of this study was to gain more information on the structure of different layers of renal arteryand comparing these structures in post-natal male and female sheep. to do so, right and left renal arteries of6 adult and 6 newborn animals were dissected; the middle parts of arteries were only collected. after tissueprocessing using paraffin embedding method, 5–6-μm sections were cut and...

Plant vascular meristems are sets of pluripotent cells that enable radial growth by giving rise to vascular tissues and are therefore crucial to plant development. However, the overall dynamics of cellular determination and patterning in and around vascular meristems is still unexplored. We study this process in the shoot vascular tissue of Arabidopsis thaliana, which is organized in vascular b...

The genus Grammosciadium is a member of the family Apiaceae and has four taxa namely G. daucoides, macrodon subsp. macrodon, nezaketiae cornutum distributed in Turkey. Because fruit anatomical characters are distinctly important for taxonomy Apiaceae, this study includes detailed anatomy fruits genus. Moreover, some measurements from given. Besides general them, evaluated by both qualitative su...

The species Arundinella hirta L. posseses a striking variation of the leaf anatomy that is characteristic of C(4) grasses. In addition to a sheath of large, bright green cells around the vascular bundles, there are strands of large parenchyma cells which appear identical to the bundle sheath cells and which run parallel to the vascular bundles, but which are not associated with any vascular tis...

1 Laboratório de Sistemática, Evolução e Biogeografia de Plantas Vasculares, Departamento de Botânica, Instituto de Biociências, Universidade de São Paulo, São Paulo, Brazil, 2 Department of Plant Biology, University of California, Davis, Davis, CA, United States, 3 Genomics and Transposable Elements Laboratory (GaTE-Lab), Departamento de Botânica, Instituto de Biociências, Universidade de São ...

Metabolic processes underlying the formation of floral nectar carbohydrates, especially the generation of the proportions of fructose, glucose, and sucrose, are important for understanding ecological plant-pollinator interactions. The ratio of sucrose-derived hexoses, fructose and glucose, in the floral nectar of Anigozanthos flavidus (Haemodoraceae) was observed to be different from 1:1, which...

Requirement of mineral elements in different plant tissues is not often consistent with their transpiration rate; therefore, plants have developed systems for preferential distribution of mineral elements to the developing tissues with low transpiration. Here we took silicon (Si) as an example and revealed an efficient system for preferential distribution of Si in the node of rice (Oryza sativa...