scholarly journals Sugar promotes vegetative phase change in Arabidopsis thaliana by repressing the expression of MIR156A and MIR156C

eLife ◽  
2013 ◽  
Vol 2 ◽  
Author(s):  
Li Yang ◽  
Mingli Xu ◽  
Yeonjong Koo ◽  
Jia He ◽  
R Scott Poethig
Keyword(s):  
Arabidopsis Thaliana ◽  
Phase Change ◽  
Nutrient Availability ◽  
Developmental Timing ◽  
Vegetative Phase ◽  
Adult Transition ◽  
Vegetative Phase Change ◽  
Exogenous Glucose ◽  
Exogenous Sugar ◽  
Signaling Activity

Nutrients shape the growth, maturation, and aging of plants and animals. In plants, the juvenile to adult transition (vegetative phase change) is initiated by a decrease in miR156. In Arabidopsis, we found that exogenous sugar decreased the abundance of miR156, whereas reduced photosynthesis increased the level of this miRNA. This effect was correlated with a change in the timing of vegetative phase change, and was primarily attributable to a change in the expression of two genes, MIR156A and MIR156C, which were found to play dominant roles in this transition. The glucose-induced repression of miR156 was dependent on the signaling activity of HEXOKINASE1. We also show that the defoliation-induced increase in miR156 levels can be suppressed by exogenous glucose. These results provide a molecular link between nutrient availability and developmental timing in plants, and suggest that sugar is a component of the leaf signal that mediates vegetative phase change.

scholarly journals Threshold-dependent repression of SPL gene expression by miR156/miR157 controls vegetative phase change in Arabidopsis thaliana

PLoS Genetics ◽  
2018 ◽  
Vol 14 (4) ◽  
pp. e1007337 ◽  
Author(s):  
Jia He ◽  
Mingli Xu ◽  
Matthew R. Willmann ◽  
Kevin McCormick ◽  
Tieqiang Hu ◽  
...  
Keyword(s):  
Gene Expression ◽  
Arabidopsis Thaliana ◽  
Phase Change ◽  
Vegetative Phase ◽  
Vegetative Phase Change ◽  
Spl Gene

scholarly journals The trehalose 6‐phosphate pathway impacts vegetative phase change in Arabidopsis thaliana

2020 ◽  
Vol 104 (3) ◽  
pp. 768-780 ◽  
Author(s):  
Jathish Ponnu ◽  
Armin Schlereth ◽  
Vasiliki Zacharaki ◽  
Magdalena A. Działo ◽  
Christin Abel ◽  
...  
Keyword(s):  
Arabidopsis Thaliana ◽  
Phase Change ◽  
Vegetative Phase ◽  
Vegetative Phase Change

scholarly journals Low light intensity delays vegetative phase change in Arabidopsis thaliana

2021 ◽  
Author(s):  
Mingli Xu ◽  
Tieqiang Hu ◽  
R. Scott Poethig
Keyword(s):  
Arabidopsis Thaliana ◽  
Light Intensity ◽  
Phase Change ◽  
Shade Tolerance ◽  
Light Quality ◽  
Shade Avoidance ◽  
Low Light ◽  
Vegetative Phase ◽  
Master Regulators ◽  
Vegetative Phase Change

Plants that develop under low intensity light (LL) often display a phenotype known as the "shade tolerance syndrome (STS)". This syndrome is similar to the phenotype of plants in the juvenile phase of shoot development, but the basis for this similarity is unknown. We tested the hypothesis that the STS is regulated by the same mechanism that regulates the juvenile vegetative phase by examining the effect of LL on rosette development in Arabidopsis thaliana. We found that LL prolonged the juvenile vegetative phase and that this was associated with an increase the expression of the master regulators of vegetative phase change, miR156 and miR157, and a decrease in the expression of their SPL targets. Exogenous sucrose partially corrected the effect of LL on seedling development and miR156 expression. Our results suggest that the response of Arabidopsis to LL is mediated by an increase in miR156/miR157 expression and by factors that repress SPL gene expression independently of miR156/miR157, and is caused in part by a decrease in carbohydrate production. The effect of LL on vegetative phase change does not require the photoreceptors and transcription factors responsible for the shade avoidance syndrome, implying that light intensity and light quality regulate rosette development by different pathways.

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