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Primary and secondary plasmodesmata: structure, origin, and functioning
The arguments summarized in the present review demonstrate that plasmodesmata are diverse and highly dynamic structures that serve a significant role in the coordinated development and in the concerted physiological functioning of the cells within the plant tissues, organs, and organisms. Expand
Evidence for graft transmission of structural phloem proteins or their precursors in heterografts of Cucurbitaceae
Translocation of structural P-proteins in the phloem was a universal phenomenon in Cucurbitaceae as shown by a comparative screening for additional proteins in eleven graft combinations, using Benincasa hispida, Citrullus colocynthis, Cucumis melo L, C. sativus, and Trichosanthes cucumerina var. Expand
Studies on graft unions
The findings suggest the existence of a unifying mechanism of secondary formation of plasmodesmata showing far-reaching similarities with the establishment of primary cell connections. Expand
Symplasmic sieve element continuity between Orobanche and its host.
Electron microscopical investigations of primary haustoria of Orobanche crenata parasitizing the roots of the highly compatible host, Vicia narbonensis, reveal an uninterrupted phloem system… Expand
Vascular differentiation in the graft union of in-vitro grafts with different compatibility. -Structural and functional aspects
Various in-vitro grafts of explanted internodes - the heterografts Nicandra physaloides on Lycopersicon esculentum and Vicia faba on Helianthus tuberosus as well as autografta - were established in sterile culture, characterised by a complete loss of vascular regeneration between the scion and stock and by an extremely low rate of 14C-translocation into the stock. Expand
Studies on graft unions
The distribution of half and continuous plasmodesmata varies with the different areas of a graft interface: in the region of bridging vascular tissues most cell connections are continuous and in areas where cortex or pith-derived callus cells and those of misaligned tissues match, discontinuous strands predominate. Expand
Structure and development of cell connections in the phloem ofMetasequoia glyptostroboides needles I. Ultrastructural aspects of modified primary plasmodesmata in Strasburger cells
Fine structurally, plasmodesmata of Strasburger cells show great resemblance with developing sieve pores of conifers, which implicates a special role of the endomembrane system for phloem loading in the Metasequoia leaf. Expand
Plant cell graft chimeras obtained by co-culture of isolated protoplasts
Plants obtained by cell grafting in protoplast co-cultures and plantlets of all chimeral lines were grown to flowering under tissue culture conditions and some also in the greenhouse, discussing aspects of organogenesis and interspecific cooperation. Expand
Sieve Elements of Graft Unions
In grafted plants the various relations between scion and stock are based on exchange of heterogeneous substances between the partners; many of them being organic compounds which are translocated in… Expand
Filamentous proteins form plant sieve tubes.
Individual filamentous structures from the phloem exudate of cut cucurbit stems are isolated and the presence of the filaments could be clearly demonstrated after negative staining with the electron microscope. Expand