The Arabidopsis thaliana hypocotyl, a model to identify and study control mechanisms of cellular expansion.

Abstract:

:Developmental biology studies in general benefit from model organisms that are well characterized. Arabidopsis thaliana fulfills this criterion and represents one of the best experimental systems to study developmental processes in higher plants. Light is a crucial factor that drives photosynthesis, but that also regulates plant morphogenesis. As the hypocotyl is completely embryonic of origin, its growth occurs solely by expansion of the cells and this process is strongly dependent on the light conditions. In this review, we provide evidence that the hypocotyl serves as ideal model object to study cell expansion mechanisms and its regulation. We focus on the regulation of hypocotyl development by light and highlight the key modulating proteins in this signaling cascade. Downstream of light-signaling, cellular expansion is greatly dependent on specific cell wall depositions, which is related to cortical microtubular (re)arrangements and on composition and/or extensibility of the cell wall. We discuss possible further experimental approaches to broaden our knowledge on hypocotyl development, which will give an outlook on the probable evolution of the field.

journal_name

Plant Cell Rep

journal_title

Plant cell reports

authors

Boron AK,Vissenberg K

doi

10.1007/s00299-014-1591-x

subject

Has Abstract

pub_date

2014-05-01 00:00:00

pages

697-706

issue

5

eissn

0721-7714

issn

1432-203X

journal_volume

33

pub_type

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