Phloem in carrot calluses

Abstract

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. 
DOI: 10.1007/BF00387124

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Cite this paper

@article{Hanson1970PhloemIC, title={Phloem in carrot calluses}, author={Andrew D. Hanson and Jeffery Edelman}, journal={Planta}, year={1970}, volume={93}, pages={171-174} }