Russian Journal of Plant Physiology

, Volume 59, Issue 4, pp 467–478

Towards an integrated view of monocarpic plant senescence

Reviews

DOI: 10.1134/S102144371204005X

Cite this article as:
Davies, P.J. & Gan, S. Russ J Plant Physiol (2012) 59: 467. doi:10.1134/S102144371204005X

Abstract

After the flowering of an annual plant, the whole plant will senesce and die. For the process to go to completion, this monocarpic senescence must include three coordinated processes, which have not previously been considered as a total syndrome: (1) the arrest of growth and senescence of the shoot apical meristem; (2) senescence of the leaves; and (3) the suppression of axillary bud growth. Concurrently there is a shift in resource allocation from continued vegetative growth to reproductive growth, combined with a withdrawal of nutrients, especially nitrogen compounds, from the leaves and the transfer of these nutrients to the developing seeds. The start of the senescence process is caused by a shift, almost certainly in gene expression, very early in the reproductive phase. Continuation of the resource transfer and senescence of the vegetative plant involves hormonal regulation and continued changes in gene expression. Each of these processes is examined, especially with reference to the transfer of resources from vegetative to reproductive growth.

Keywords

Pisum sativum Arabidopsis thaliana Spinacia oleracea senescence monocarpic whole plant resource allocation leaf apical bud axillary buds flowering reproduction sugar nitrogen 

Abbreviations

JA

jasmonic acid

LD

long day

SD

short day

Copyright information

© Pleiades Publishing, Ltd. 2012

Authors and Affiliations

  1. 1.Departments of Plant Biology and HorticultureCornell UniversityIthacaUSA

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