The reduction in maize leaf growth under mild drought affects the transition between cell division and cell expansion and cannot be restored by elevated gibberellic acid levels
Autor: | Gerrit T.S. Beemster, Kirin Demuynck, Yusuke Jikumaru, Bart Rymen, Marnik Vuylsteke, Jolien De Block, Hilde Nelissen, Xiaohuan Sun, Steven Maere, Dorota Herman, Hitoshi Sakakibara, Yumiko Takebayashi, Mikko Kojima, Yuji Kamiya, Rafael Abbeloos, Frederik Coppens, Dirk Inzé, Veronique Storme |
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Jazyk: | angličtina |
Rok vydání: | 2018 |
Předmět: |
0106 biological sciences
0301 basic medicine DYNAMICS cell division CYCLE ARREST Cell division Plant Science maize 01 natural sciences Transcriptome chemistry.chemical_compound Gene Expression Regulation Plant mild drought Transcriptional regulation Arabidopsis thaliana TRANSCRIPTION FACTOR Research Articles 2. Zero hunger biology DEVELOPING LEAVES food and beverages Droughts Horticulture PLANT WATER STATUS Gibberellin Engineering sciences. Technology gibberellic acid Research Article Biotechnology Osmotic shock SHOOT MERISTEM SIZE Zea mays 03 medical and health sciences INBRED LINES Botany Biology Transcription factor Gibberellic acid ORGAN SIZE fungi Biology and Life Sciences 15. Life on land biology.organism_classification Gibberellins OSMOTIC-STRESS Plant Leaves 030104 developmental biology chemistry ARABIDOPSIS-THALIANA Agronomy and Crop Science DEVELOPMENTAL 010606 plant biology & botany |
Zdroj: | PLANT BIOTECHNOLOGY JOURNAL Plant Biotechnology Journal Plant biotechnology journal |
ISSN: | 1467-7644 1467-7652 |
Popis: | Summary Growth is characterized by the interplay between cell division and cell expansion, two processes that occur separated along the growth zone at the maize leaf. To gain further insight into the transition between cell division and cell expansion, conditions were investigated in which the position of this transition zone was positively or negatively affected. High levels of gibberellic acid (GA) in plants overexpressing the GA biosynthesis gene GA20-OXIDASE (GA20OX-1OE) shifted the transition zone more distally, whereas mild drought, which is associated with lowered GA biosynthesis, resulted in a more basal positioning. However, the increased levels of GA in the GA20OX-1OE line were insufficient to convey tolerance to the mild drought treatment, indicating that another mechanism in addition to lowered GA levels is restricting growth during drought. Transcriptome analysis with high spatial resolution indicated that mild drought specifically induces a reprogramming of transcriptional regulation in the division zone. “Leaf Growth Viewer” was developed as an online searchable tool containing the high-resolution data. This article is protected by copyright. All rights reserved. |
Databáze: | OpenAIRE |
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