scholarly journals Differential Methylation during Maize Leaf Growth Targets Developmentally Regulated Genes

2014 ◽  
Vol 164 (3) ◽  
pp. 1350-1364 ◽  
Author(s):  
Jasper Candaele ◽  
Kirin Demuynck ◽  
Douglas Mosoti ◽  
Gerrit T.S. Beemster ◽  
Dirk Inzé ◽  
...  
Keyword(s):  
Leaf Growth ◽  
Differential Methylation ◽  
Developmentally Regulated ◽  
Maize Leaf

Cadmium inhibits cell cycle progression and specifically accumulates in the maize leaf meristem

2020 ◽  
Vol 71 (20) ◽  
pp. 6418-6428
Author(s):  
Jonas Bertels ◽  
Michiel Huybrechts ◽  
Sophie Hendrix ◽  
Lieven Bervoets ◽  
Ann Cuypers ◽  
...  
Keyword(s):  
Cell Cycle ◽  
Cell Cycle Progression ◽  
Leaf Growth ◽  
Cellular Level ◽  
Cycle Duration ◽  
Meristematic Tissue ◽  
Cycle Progression ◽  
Maize Leaf ◽  
Cell Volumes ◽  
Lower Expression

Abstract It is well known that cadmium (Cd) pollution inhibits plant growth, but how this metal impacts leaf growth processes at the cellular and molecular level is still largely unknown. In the current study, we show that Cd specifically accumulates in the meristematic tissue of the growing maize leaf, while Cd concentration in the elongation zone rapidly declines as the deposition rates diminish and cell volumes increase due to cell expansion. A kinematic analysis shows that, at the cellular level, a lower number of meristematic cells together with a significantly longer cell cycle duration explain the inhibition of leaf growth by Cd. Flow cytometry analysis suggests an inhibition of the G1/S transition, resulting in a lower proportion of cells in the S phase and reduced endoreduplication in expanding cells under Cd stress. Lower cell cycle activity is also reflected by lower expression levels of key cell cycle genes (putative wee1, cyclin-B2-4, and minichromosome maintenance4). Cell elongation rates are also inhibited by Cd, which is possibly linked to the inhibited endoreduplication. Taken together, our results complement studies on Cd-induced growth inhibition in roots and link inhibited cell cycle progression to Cd deposition in the leaf meristem.

scholarly journals Drought Induces Distinct Growth Response, Protection, and Recovery Mechanisms in the Maize Leaf Growth Zone

2015 ◽  
Vol 169 (2) ◽  
pp. 1382-1396 ◽  
Author(s):  
Viktoriya Avramova ◽  
Hamada AbdElgawad ◽  
Zhengfeng Zhang ◽  
Bartosz Fotschki ◽  
Romina Casadevall ◽  
...  
Keyword(s):  
Growth Response ◽  
Leaf Growth ◽  
Growth Zone ◽  
Maize Leaf ◽  
Recovery Mechanisms

scholarly journals A Local Maximum in Gibberellin Levels Regulates Maize Leaf Growth by Spatial Control of Cell Division

2012 ◽  
Vol 22 (13) ◽  
pp. 1183-1187 ◽  
Author(s):  
Hilde Nelissen ◽  
Bart Rymen ◽  
Yusuke Jikumaru ◽  
Kirin Demuynck ◽  
Mieke Van Lijsebettens ◽  
...  
Keyword(s):  
Cell Division ◽  
Leaf Growth ◽  
Local Maximum ◽  
Spatial Control ◽  
Maize Leaf

scholarly journals How grass keeps growing: an integrated analysis of hormonal crosstalk in the maize leaf growth zone

2019 ◽  
Vol 225 (6) ◽  
pp. 2513-2525 ◽  
Author(s):  
Dirk De Vos ◽  
Hilde Nelissen ◽  
Hamada AbdElgawad ◽  
Els Prinsen ◽  
Jan Broeckhove ◽  
...  
Keyword(s):  
Leaf Growth ◽  
Growth Zone ◽  
Integrated Analysis ◽  
Maize Leaf ◽  
Hormonal Crosstalk

scholarly journals 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

2017 ◽  
Vol 16 (2) ◽  
pp. 615-627 ◽  
Author(s):  
Hilde Nelissen ◽  
Xiao-Huan Sun ◽  
Bart Rymen ◽  
Yusuke Jikumaru ◽  
Mikko Kojima ◽  
...  
Keyword(s):  
Cell Division ◽  
Gibberellic Acid ◽  
Cell Expansion ◽  
Leaf Growth ◽  
Maize Leaf ◽  
Mild Drought

scholarly journals A Local Maximum in Gibberellin Levels Regulates Maize Leaf Growth by Spatial Control of Cell Division

2012 ◽  
Vol 22 (13) ◽  
pp. 1266 ◽  
Author(s):  
Hilde Nelissen ◽  
Bart Rymen ◽  
Yusuke Jikumaru ◽  
Kirin Demuynck ◽  
Mieke Van Lijsebettens ◽  
...  
Keyword(s):  
Cell Division ◽  
Leaf Growth ◽  
Local Maximum ◽  
Spatial Control ◽  
Maize Leaf

scholarly journals SOME MAIZE LEAF GROWTH TRAITS AS INFLUENCED BY SOME INTEGRATED FERTILIZATION REGIMES

2019 ◽  
Vol 46 (6) ◽  
pp. 1809-1824
Author(s):  
Amira Khattab ◽  
A. El-Khawaga ◽  
M. Saleh ◽  
I. Ramadan
Keyword(s):  
Growth Traits ◽  
Leaf Growth ◽  
Maize Leaf

scholarly journals Cytokinin promotes jasmonic acid accumulation in the control of maize leaf growth

2019 ◽  
Author(s):  
Aimee N. Uyehara ◽  
Angel R. Del Valle-Echevarria ◽  
Charles T. Hunter ◽  
Hilde Nelissen ◽  
Kirin Demuynck ◽  
...  
Keyword(s):  
Growth Rate ◽  
Cell Division ◽  
Jasmonic Acid ◽  
Leaf Growth ◽  
Leaf Size ◽  
Wild Type ◽  
Cytokinin Signaling ◽  
Transcript Accumulation ◽  
Maize Leaf ◽  
Pathway Gene

AbstractGrowth of plant organs results from the combined activity of cell division and cell expansion. The coordination of these two processes depends on the interplay between multiple hormones that determine final organ size. Using the semidominant Hairy Sheath Frayed1 (Hsf1) maize mutant, that hypersignals the perception of cytokinin (CK), we show that CK can reduce leaf size and growth rate by decreasing cell division. Linked to CK hypersignaling, the Hsf1 mutant has increased jasmonic acid (JA) content, a hormone that can inhibit cell division. Treatment of wild type seedlings with exogenous JA reduces maize leaf size and growth rate, while JA deficient maize mutants have increased leaf size and growth rate. Expression analysis revealed increased transcript accumulation of several JA pathway genes in the Hsf1 leaf growth zone. A transient treatment of growing wild type maize shoots with exogenous CK also induced JA pathway gene expression, although this effect was blocked by co-treatment with cycloheximide. Together our results suggest that CK can promote JA accumulation possibly through increased expression of specific JA pathway genes.One sentence summaryCytokinin-signaling upregulates the jasmonate biosynthesis pathway, resulting in jasmonate accumulation and influences on maize leaf growth.

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