Abstract
The paper reports studies, including histological and ultrastructural analyses, of in vitro cell proliferation and development of immature endosperm tissue isolated from caryopses of Triticum aestivum, Triticum durum, and Triticosecale plants. Endosperm isolated at 7–10 days post-anthesis developed well on MS medium supplemented with auxins and/or cytokinins. The efficiency of endosperm response was highly genotype-dependent and best in two winter cultivars of hexaploid species. The pathways of development and proliferation were very similar among the selected species and cultivars. Histological and scanning electron microscope (SEM) analysis revealed that only the part of the endosperm not touching the medium surface continued growth and development, resulting in swelling. The central part of swollen regions was composed mainly of cells containing many large starch grains. The peripheric parts of developed endosperm consisted of highly vacuolated cells and small cells with dense cytoplasm. SEM showed that cells from the swollen region were covered partially with a membraneous structure. Transmission electron microscope studies of cells from the outer part of the developing region showed features typical for cell activity connected with lipid metabolism.
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Acknowledgments
SEM images were made in the Laboratory of Scanning Electron Microscopy for Biological and Geological Sciences, Institute of Zoology, Jagiellonian University. Some of the equipment for this laboratory was provided by the Foundation for Polish Science, Program Subin 94.
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Popielarska-Konieczna, M., Kozieradzka-Kiszkurno, M., Tuleja, M. et al. Genotype-dependent efficiency of endosperm development in culture of selected cereals: histological and ultrastructural studies. Protoplasma 250, 361–369 (2013). https://doi.org/10.1007/s00709-012-0419-1
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DOI: https://doi.org/10.1007/s00709-012-0419-1