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Photoperiodic control of seasonal growth is mediated by ABA acting on cell-cell communication

Accepted version
Peer-reviewed

Type

Article

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Authors

Tylewicz, S 
Petterle, A 
Marttila, S 
Miskolczi, P 
Azeez, A 

Abstract

In temperate and boreal ecosystems, seasonal cycles of growth and dormancy allow perennial plants to adapt to winter conditions. We show, in hybrid aspen trees, that photoperiodic regulation of dormancy is mechanistically distinct from autumnal growth cessation. Dormancy sets in when symplastic intercellular communication through plasmodesmata is blocked by a process dependent on the phytohormone abscisic acid. The communication blockage prevents growth-promoting signals from accessing the meristem. Thus, precocious growth is disallowed during dormancy. The dormant period, which supports robust survival of the aspen tree in winter, is due to loss of access to growth-promoting signals.

Description

Keywords

Abscisic Acid, Cell Communication, Circadian Rhythm, Meristem, Photoperiod, Plant Dormancy, Plant Growth Regulators, Populus, Seasons, Trees

Journal Title

Science

Conference Name

Journal ISSN

0036-8075
1095-9203

Volume Title

360

Publisher

AAAS

Rights

All rights reserved
Sponsorship
European Research Council (323052)
Gatsby Charitable Foundation (GAT3395/PR3)