Chapter

Causes of Subindividual Variability: <i>Mutations within individuals and organ-level responses to environmental cues are the main classes of remote causes of within-plant variability in reiterated structures</i>.

Carlos M. Herrera

in Multiplicity in Unity

Published by University of Chicago Press

Published in print November 2009 | ISBN: 9780226327938
Published online February 2013 | e-ISBN: 9780226327952 | DOI: http://dx.doi.org/10.7208/chicago/9780226327952.003.0005
Causes of Subindividual Variability: Mutations within individuals and organ-level responses to environmental cues are the main classes of remote causes of within-plant variability in reiterated structures.

Show Summary Details

Preview

This chapter explains the remote causes of subindividual variation, that is, those cases where reiterated parts vary because the organism's genes vary or the parts experience varied environments. This variation falls into two classes of genetic heterogeneity within individual and semiautonomous programmed responses of organs within individual to environmental cues, that is, developmental phenotypic plasticity of individual organs as governed by more or less rigid organ-level reaction norms. It is shown that widespread occurrence of organ-level phenotypic plasticity indicates that there is no need to invoke subindividual genetic mosaicism to account for within-plant variation in the phenotypic characteristics of all kinds of reiterated organs. The organ-level phenotypic plasticity provides the conceptual basis as a general phenomenon, which implies that a number of the organismal mechanisms that account for within-plant variation stem from the joint effects of location in the plant.

Keywords: subindividual variation; genetic heterogeneity; environmental cues; phenotypic plasticity; genetic mosaicism

Chapter.  11920 words.  Illustrated.

Subjects: Evolutionary Biology

Full text: subscription required

How to subscribe Recommend to my Librarian

Users without a subscription are not able to see the full content. Please, subscribe or login to access all content.