Inhibition of internode growth due to mechanical stress inBryonia dioica: relationship between changes in DNA methylation and ethylene metabolism
作者:
Jean‐Philippe Galaud,
Thomas Gaspar,
Nicole Boyer,
期刊:
Physiologia Plantarum
(WILEY Available online 1993)
卷期:
Volume 87,
issue 1
页码: 25-30
ISSN:0031-9317
年代: 1993
DOI:10.1111/j.1399-3054.1993.tb08786.x
出版商: Blackwell Publishing Ltd
关键词: Bryonia dioica;DNA methylation;ethylene;S‐adenosylmethionine;thigmomorphogenesis
数据来源: WILEY
摘要:
Changes in the level of cytosine methylation were assessed by HPLC in mechanically stressedBryonia dioica. Rubbing young internodes. which results in growth inhibition and ethylene production, induced a rapid and transient decrease of cytosine methylation in DNA. The level of cytosine methylation was about 25% in young internodes and dropped to nearly 0% in less than 1 h before increasing to the normal level within 3 h. A decreasing gradient of DNA methylation occurred naturally along the plant, from the apex to the base. The pool of S‐adenosylmethionine was also measured in order to establish a possible relationship between ethylene metabolism and DNA methylation. The role of DNA methylation in gene regulation is discussed and different mechanisms for methylation are considere
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