The distribution of adenosine triphosphatase activity in differentiating and mature phloem cells of Nicotiana tabacum and its relationship to phloem transport
Journal of Ultrastructure Research, ISSN: 0022-5320, Vol: 44, Issue: 5, Page: 388-404
1973
- 39Citations
- 5Captures
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Metrics Details
- Citations39
- Citation Indexes39
- CrossRef39
- 32
- Captures5
- Readers5
Article Description
A cytochemical study has been made of the distribution of ATPase activity during the differentiation of phloem cells in Nicotiana tabacum. At early stages of differentiation, P-protein bodies consisting of compact aggregates of P-protein tubules are formed in the sieve elements. Cells at this stage of development show ATPase activity at their surfaces, in mitochondria, and in dictysomes; however, there is no evidence of activity associated with the P-protein bodies. At intermediate stages of sieve element differentiation, when the P-protein tubules begin to disperse in the cell lumen, reaction product indicating ATPase activity is observed associated with the P-protein. Activity is also found during this stage at the cell surfaces, in the mitochondria, dictyosomes, and plasmodesmata. In mature sieve elements, ATPase activity is associated with the dispersed P-proteins, at the cell surfaces, sieve-element reticulum, and in mitochondria. ATPase activity is demonstrated in companion cells and parenchyma cells at all stages at the surfaces, and in mitochondria and plasmodesmata.
Bibliographic Details
http://www.sciencedirect.com/science/article/pii/S0022532073900063; http://dx.doi.org/10.1016/s0022-5320(73)90006-3; http://www.scopus.com/inward/record.url?partnerID=HzOxMe3b&scp=0015845287&origin=inward; http://www.ncbi.nlm.nih.gov/pubmed/4271428; http://linkinghub.elsevier.com/retrieve/pii/S0022532073900063; http://api.elsevier.com/content/article/PII:S0022532073900063?httpAccept=text/xml; http://api.elsevier.com/content/article/PII:S0022532073900063?httpAccept=text/plain; https://linkinghub.elsevier.com/retrieve/pii/S0022532073900063; http://dx.doi.org/10.1016/s0022-5320%2873%2990006-3; https://dx.doi.org/10.1016/s0022-5320%2873%2990006-3
Elsevier BV
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