Overwintering in Woody Plants_ Involvement of ABA and Dehydrins

Overwintering in Woody Plants_ Involvement of ABA and Dehydrins

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Overwintering in Woody Plants: Involvement of ABA and Dehydrins Annikki Welling Institute of Biotechnology and Department of Biosciences, Division of Genetics Faculty of Science University of Helsinki Finland Academic dissertation To be presented for public criticism, with permission of the Faculty of Science, University of Helsinki, in the auditorium 1041 of the Biocenter, Viikinkaari 5 on August 29 th , 2003, at 12 o’clock noon Helsinki 2003
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Supervisors: Dr Päivi Rinne Department of Plant Sciences Agricultural University of Norway, Norway Docent Pekka Heino Department of Biosciences Division of Genetics University of Helsinki, Finland Professor Tapio Palva Department of Biosciences Division of Genetics University of Helsinki, Finland Reviewers: Docent Kurt Fagerstedt Department of Biosciences Division of Plant Physiology University of Helsinki, Finland Docent Viola Niklander-Teeri Department of Applied Biology University of Helsinki, Finland ISSN 1239-9469 ISBN 952-10-1043-6 ISBN 952-10-1044-4 (PDF)
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TABLE OF CONTENTS LIST OF ORIGINAL PUBLICATIONS ……………………………….………………5 ABBREVIATIONS ……………………………….…………. ..…………………………6 SUMMARY ……………………………….……………………………………………. .. 7 1. INTRODUCTION ……………………………………….…………………………. . 8 1.1. Dormancy ……………………………………………………………….…… 8 1.1.1. Phenology of dormancy ………………………………………………. 8 1.2. Ultrastructural changes during dormancy ………………………………. 10 1.2.1. Changes in the apical meristem ………………………………….…. . 10 1.2.2. Cytoplasmic alterations ……………………………………………. .. 10 1.3. Cold acclimation of woody plants ………………………………………… 10 1.3.1. Sequential cold acclimation during overwintering …………………. . 10 1.3.2. Other freezing tolerance inducing factors in woody plants …………. 11 1.4. Perception of photoperiod and temperature signals ……………………. . 12 1.4.1. Photoreceptor of plants ……………………………………………… 12 1.4.1.1. Phytochrome photoreceptors ………………………………… 12 1.4.1.2. Phytochrome responses ……………………………………… 13 1.4.1.3. Endogenous clock ……………………………………………. 13 1.4.1.4. Photoperiodic ecotypes ……………………………………. .... 14 1.4.2. Low temperature perception ………………………………………. ... 14 1.5. Mechanism of freezing tolerance in plants ……………………………. ..... 15 1.5.1. Acclimation capacity of plants ……………………………………… 15 1.5.2. Control of the freezing process ……………………………………. ...15 1.5.3. Injuries caused by sub-optimal temperatures…………………………. 16
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This note was uploaded on 08/01/2009 for the course HORT hor-11-12 taught by Professor Park during the Spring '09 term at A.T. Still University.

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Overwintering in Woody Plants_ Involvement of ABA and Dehydrins

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