THEORY OF GEOTROPISM BASED ON MASS ACTION

1. It is shown that the rate of geotropic curvature of a piece of stem of Bryophyllum calycinum when suspended horizontally increases with the mass of an apical leaf attached to the stem. 2. It is shown that the dry weight of the stem increases with the mass of the leaf attached and also that the de...

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Detalles Bibliográficos
Autor principal: Loeb, Jacques
Formato: Texto
Lenguaje:English
Publicado: The Rockefeller University Press 1923
Materias:
Article
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2140606/
https://www.ncbi.nlm.nih.gov/pubmed/19872042
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author Loeb, Jacques
author_facet Loeb, Jacques
author_sort Loeb, Jacques
collection PubMed
description 1. It is shown that the rate of geotropic curvature of a piece of stem of Bryophyllum calycinum when suspended horizontally increases with the mass of an apical leaf attached to the stem. 2. It is shown that the dry weight of the stem increases with the mass of the leaf attached and also that the degree of curvature increases with this increase in the dry weight of the stem. 3. The conclusion is drawn that geotropic curvature is in this case a function of mass action of the material sent by the leaf into the basal part of the stem. 4. The material sent by a leaf into the apical part of a stem does not lead to the same geotropic curvature.
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spelling pubmed-21406062008-04-23 THEORY OF GEOTROPISM BASED ON MASS ACTION Loeb, Jacques J Gen Physiol Article 1. It is shown that the rate of geotropic curvature of a piece of stem of Bryophyllum calycinum when suspended horizontally increases with the mass of an apical leaf attached to the stem. 2. It is shown that the dry weight of the stem increases with the mass of the leaf attached and also that the degree of curvature increases with this increase in the dry weight of the stem. 3. The conclusion is drawn that geotropic curvature is in this case a function of mass action of the material sent by the leaf into the basal part of the stem. 4. The material sent by a leaf into the apical part of a stem does not lead to the same geotropic curvature. The Rockefeller University Press 1923-07-20 /pmc/articles/PMC2140606/ /pubmed/19872042 Text en Copyright © Copyright, 1923, by The Rockefeller Institute for Medical Research This article is distributed under the terms of an Attribution–Noncommercial–Share Alike–No Mirror Sites license for the first six months after the publication date (see http://www.rupress.org/terms). After six months it is available under a Creative Commons License (Attribution–Noncommercial–Share Alike 4.0 Unported license, as described at http://creativecommons.org/licenses/by-nc-sa/4.0/).
spellingShingle Article
Loeb, Jacques
THEORY OF GEOTROPISM BASED ON MASS ACTION
title THEORY OF GEOTROPISM BASED ON MASS ACTION
title_full THEORY OF GEOTROPISM BASED ON MASS ACTION
title_fullStr THEORY OF GEOTROPISM BASED ON MASS ACTION
title_full_unstemmed THEORY OF GEOTROPISM BASED ON MASS ACTION
title_short THEORY OF GEOTROPISM BASED ON MASS ACTION
title_sort theory of geotropism based on mass action
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2140606/
https://www.ncbi.nlm.nih.gov/pubmed/19872042
work_keys_str_mv AT loebjacques theoryofgeotropismbasedonmassaction

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