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
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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