Summary
Translocation of 14C-labelled photosynthate across 2 cm long carrot calluses was not detectable even 6 hours after a 30 min 14CO2 pulse. This is consistent with the discontinuous nature of the phloem as a whole, although small strands of contiguous, well differentiated sieve cells with companion cells were readily seen in electron micrographs.
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References
Gautheret, R. J.: La culture des Tissus Végétaux, Paris: Masson & Cie. 1959.
Hofstra, G., Nelson, C. D.: A comparative study of translocation of assimilated 14C from leaves of different species. Planta (Berl.) 88, 103–112 (1969).
Karstens, W. K. H.: Phloem formation in explants and tissue cultures, from an anatomical point of view. Proceedings of an Internat. Conference on Plant Tissue Culture, p. 309. California: McCutchan Publishing Corp. 1965.
Reinert, J., Backs, D.: Control of totipotency in plant cells growing in vitro. Nature (Lond.) 220, 1340 (1968).
Roux, E., Tendille, C.: Pigments des chloroplastes et photosynthèse. C. R. Acad. Sci. (Paris) 238, 1261–1263 (1954)
Weatherly, P. E., Johnson, R. P. C.: The form and function of the sieve tube: a problem in reconciliation. Int. Rev. Cytol. 24, 149–192 (1968).
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With the technical collaboration of H. J. W. Edge. Botany Dept. Kings College, London.
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Hanson, A.D., Edelman, J. Phloem in carrot calluses. Planta 93, 171–174 (1970). https://doi.org/10.1007/BF00387124
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DOI: https://doi.org/10.1007/BF00387124