Matches in SemOpenAlex for { <https://semopenalex.org/work/W2085114732> ?p ?o ?g. }
Showing items 1 to 55 of
55
with 100 items per page.
- W2085114732 endingPage "171" @default.
- W2085114732 startingPage "165" @default.
- W2085114732 abstract "A recent paper by Crafts (1) discusses in an interesting manner the mechanism which effects rapid movement of organic solutes in the tissues external to the cambium. That such rapid movement, usually in a downward direction, does actually occur few will question. The general magnitude of sugar and also of organic nitrogen movement has been estimated by Mason and Maskell to be of the order of physical diffusion in gaseous systems rather than the much lower rates, possible by diffusion alone in aqueous systems. Such a problem clearly demands careful scrutiny of any theory regarding a possible physical mechanism, especially one elaborated with due regard to the histological nature of the tissues concerned. Crafts suggests a mechanism very similar to that of Munch (3) but is led by certain interesting anatomical observations to suggest that the translocation proceeds not in the sieve tubes (the most striking, longitudinally specialized cells of the phloem) but principally along the cell walls of the whole phloem tissues including sieve tubes, companion cells and parenchyma. The mechanism is not analogous to diffusion as Mason and Maskell propose but is definitely dependent upon mass flow of solution in the cell walls. Crafts develops his theory as the result of a laudable attempt to decide anatomically the route offering least resistance to mass flow. The writers have every sympathy with such an anatomical approach but are equally clear that any apparent conclusions indicated on purely anatomical grounds must be interpreted strictly in accordance with physical principles and probability. We welcome the interesting contributions which Crafts has made to the histology of the phloem but it is the purpose of this note to show that some of the interpretations fundamental to the mechanism suggested are physically inadmissible. Crafts' rejection of the sieve tubes as the path for translocation in favor of the cell walls is a distinctly novel feature. This follows principally upon the interesting observation that the total cross-sectional area of the phloem mounted fresh is composed of cell wall material in much greater degree than would be expected from preparations fixed and mounted in the usual manner. In the latter case it is shown that marked shrinkage of the wall occurs. The relative contributions of sieve tubes, pores in sieve plates, and the walls of all the phloem cells to the cross-sectional area of undried phloem were estimated by projection methods. Crafts arrives at the con-" @default.
- W2085114732 created "2016-06-24" @default.
- W2085114732 creator A5023257353 @default.
- W2085114732 creator A5075781755 @default.
- W2085114732 date "1932-01-01" @default.
- W2085114732 modified "2023-09-23" @default.
- W2085114732 title "MOVEMENT OF ORGANIC MATERIALS IN PLANTS: A NOTE ON A RECENTLY SUGGESTED MECHANISM" @default.
- W2085114732 cites W2009619764 @default.
- W2085114732 cites W657012932 @default.
- W2085114732 doi "https://doi.org/10.1104/pp.7.1.165" @default.
- W2085114732 hasPubMedCentralId "https://www.ncbi.nlm.nih.gov/pmc/articles/439802" @default.
- W2085114732 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/16652757" @default.
- W2085114732 hasPublicationYear "1932" @default.
- W2085114732 type Work @default.
- W2085114732 sameAs 2085114732 @default.
- W2085114732 citedByCount "12" @default.
- W2085114732 crossrefType "journal-article" @default.
- W2085114732 hasAuthorship W2085114732A5023257353 @default.
- W2085114732 hasAuthorship W2085114732A5075781755 @default.
- W2085114732 hasConcept C107038049 @default.
- W2085114732 hasConcept C111472728 @default.
- W2085114732 hasConcept C138885662 @default.
- W2085114732 hasConcept C185592680 @default.
- W2085114732 hasConcept C2780226923 @default.
- W2085114732 hasConcept C86803240 @default.
- W2085114732 hasConcept C89611455 @default.
- W2085114732 hasConceptScore W2085114732C107038049 @default.
- W2085114732 hasConceptScore W2085114732C111472728 @default.
- W2085114732 hasConceptScore W2085114732C138885662 @default.
- W2085114732 hasConceptScore W2085114732C185592680 @default.
- W2085114732 hasConceptScore W2085114732C2780226923 @default.
- W2085114732 hasConceptScore W2085114732C86803240 @default.
- W2085114732 hasConceptScore W2085114732C89611455 @default.
- W2085114732 hasIssue "1" @default.
- W2085114732 hasLocation W20851147321 @default.
- W2085114732 hasLocation W20851147322 @default.
- W2085114732 hasOpenAccess W2085114732 @default.
- W2085114732 hasPrimaryLocation W20851147321 @default.
- W2085114732 hasRelatedWork W1964722019 @default.
- W2085114732 hasRelatedWork W1980494973 @default.
- W2085114732 hasRelatedWork W2024776273 @default.
- W2085114732 hasRelatedWork W2320217082 @default.
- W2085114732 hasRelatedWork W2346662740 @default.
- W2085114732 hasRelatedWork W2361816972 @default.
- W2085114732 hasRelatedWork W2970076102 @default.
- W2085114732 hasRelatedWork W3042987821 @default.
- W2085114732 hasRelatedWork W4200469249 @default.
- W2085114732 hasRelatedWork W4245476552 @default.
- W2085114732 hasVolume "7" @default.
- W2085114732 isParatext "false" @default.
- W2085114732 isRetracted "false" @default.
- W2085114732 magId "2085114732" @default.
- W2085114732 workType "article" @default.