Analysis of expansin-induced morphogenesis on the apical meristem of tomato

Fleming, J. Andrew; Caderas, Doina; Wehrli, Ernst; McQueen-Mason, Simon; Kuhlemeier, Cris (1999). Analysis of expansin-induced morphogenesis on the apical meristem of tomato. Planta, 208(2), pp. 166-174. Springer 10.1007/s004250050546

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Our previous work has shown that localised activity of the cell-wall-loosening protein expansin is sufficient to induce primordia on the apical meristem of tomato, consistent with the hypothesis that tissue expansion plays a key role in leaf initiation. In this paper we describe the earliest morphogenic events visible on the surface of the apical meristem of tomato (Lycopersicon esculentum Mill.) following treatment with expansin and report on the spectrum of final structures formed. Our observations are consistent with a proposed primary function of expansin effecting morphogenesis via altered biophysical stress patterns in the meristem. The primordia induced by expansin do not complete the full program of leaf development. We present data indicating that one reason for this might be the inability of exogenous expansin to mimic the endogenous pattern of expansin activity in the meristem. These data provide the first detailed analysis at the cellular level of expansin action on living tissue, the first description of the spectrum of structures induced by expansin on the apical meristem, and give an insight into a potentially fundamental mechanism in plant development.

Item Type:

Journal Article (Original Article)

Division/Institute:

08 Faculty of Science > Department of Biology > Institute of Plant Sciences (IPS) > Plant Development
08 Faculty of Science > Department of Biology > Institute of Plant Sciences (IPS)

UniBE Contributor:

Kuhlemeier, Cris

Subjects:

500 Science > 580 Plants (Botany)

ISSN:

0032-0935

Publisher:

Springer

Language:

English

Submitter:

Peter Alfred von Ballmoos-Haas

Date Deposited:

02 Jun 2016 12:08

Last Modified:

02 Jun 2016 12:08

Publisher DOI:

10.1007/s004250050546

Uncontrolled Keywords:

Cell wall, Expansin, Leaf development, Lycopersicon (morphogenesis), Morphogenesis, Shoot apex

BORIS DOI:

10.7892/boris.82783

URI:

https://boris.unibe.ch/id/eprint/82783

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