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Analysis of the spatial expression pattern of seven Kip related proteins (KRPs) in the shoot apex of Arabidopsis thaliana.

Abstract：

BACKGROUND AND AIMS:Kip-related-proteins (KRPs), negative regulators of cell division, have recently been discovered in plants but their in planta function is as yet unclear. In this study the spatial expression of all seven KRP genes in shoot apices of Arabidopsis thaliana were compared. METHODS:In situ hybridization analyses were performed on longitudinal sections of shoot apices from 2-month-old Arabidopsis plants. KEY RESULTS:The study provides evidence for different expression pattern groups. KRP1 and KRP2 expression is restricted to the endoreduplicating tissues. In contrast, KRP4 and KRP5 expression is mainly restricted to mitotically dividing cells. KRP3, KRP6 and KRP7 can be found in both mitotically dividing and endoreduplicating cells. CONCLUSION:The results suggest differential roles for the distinct KRPs. KRP1 and KRP2 might specifically be involved in the establishment of polyploidy. In contrast, KRP4 and KRP5 might be involved in regulating the progression through the mitotic cell cycle. KRP3, KRP6 and KRP7 might have a function in both types of cell cycle.

journal_name

Ann Bot

journal_title

Annals of botany

authors

Ormenese S,de Almeida Engler J,De Groodt R,De Veylder L,Inzé D,Jacqmard A

doi

10.1093/aob/mch077

keywords:

subject

Has Abstract

pub_date

2004-05-01 00:00:00

pages

575-80

issue

5

eissn

0305-7364

issn

1095-8290

pii

mch077

journal_volume

93

pub_type

杂志文章

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