Age‐dependent heteroblastic development of leaf hairs in <i>Arabidopsis</i>

Xu, Yunmin; Qian, Zhiyuan; Zhou, Bingying; Wu, Gang

doi:10.1111/nph.16054

Cited by 34 publications

(30 citation statements)

References 31 publications

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“…2C). TOE1 inhibits trichome production on the abaxial side of the leaf by repressing the transcription of GLABRA1 (GL1) in association with the abaxial specification gene, KANAD1 (KAN1) (Wang et al, 2019;Xu et al, 2019). In wild-type plants, GL1 expression increased dramatically at 13-14 DAG and 20 DAG, consistent with the increase in abaxial trichome production over this period.…”

Section: Resultsmentioning

confidence: 75%

ALTERED MERISTEM PROGRAM1 regulates leaf identity independent of miR156-mediated translational repression

2020

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In Arabidopsis, loss of the carboxypeptidase ALTERED MERISTEM PROGRAM1 (AMP1) produces an increase in the rate of leaf initiation, an enlarged shoot apical meristem and an increase in the number of juvenile leaves. This phenotype is also observed in plants with reduced levels of miR156-targeted SQUAMOSA PROMOTER BINDING PROTEIN-LIKE (SPL) transcription factors, suggesting that AMP1 might promote SPL activity. However, we found that the amp1 mutant phenotype is only partially corrected by elevated SPL gene expression, and that amp1 has no significant effect on SPL transcript levels, or on the level or the activity of miR156. Although AMP1 has been reported to promote miRNA-mediated translational repression, amp1 did not prevent the translational repression of the miR156 target SPL9 or the miR159 target MYB33. These results suggest that AMP1 regulates vegetative phase change downstream of, or in parallel to, the miR156/SPL pathway, and that it is not universally required for miRNA-mediated translational repression.

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Section: Resultsmentioning

confidence: 75%

ALTERED MERISTEM PROGRAM1 regulates leaf identity independent of miR156-mediated translational repression

2020

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“…The gradual change of several morphological traits, such as leaf size and leaf shape along the shoot of a plant is termed as heteroblasty. In Arabidopsis, this heteroblastic development involved in the ration of leaf length to width, leaf serration and complex and the emergence of trichomes (leaf hairs) on the abaxial surface of leaf blades [32][33][34]. The transition from juvenile to adult phase is marked by these heteroblastic traits.…”

Section: Mir156 Mediate Heteroblastic Change Of Leaf Morphologymentioning

confidence: 99%

“…However, the mechanical connection between plant age and leaf polarity was still unknown until recently in two independent works [33,34]. A dominant mutant of GLABRA1 (GL1) gene, gl1-D accelerates the initiation of leaf hairs caused by a 3 noncoding region substitution (G to A) in the GL1 gene [33]. TOE1, an AP2-like transcriptional factor is identified binding to the 3 region of GL1 to repress its expression by both works.…”

Section: Mir156 Mediate the Leaf Hairs Initiationmentioning

confidence: 99%

A Regulatory Network for miR156-SPL Module in Arabidopsis thaliana

Zheng

Sang

et al. 2019

IJMS

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Vegetative phase changes in plants describes the transition between juvenile and adult phases of vegetative growth before flowering. It is one of the most fundamental mechanisms for plants to sense developmental signals, presenting a complex process involving many still-unknown determinants. Several studies in annual and perennial plants have identified the conservative roles of miR156 and its targets, SBP/SPL genes, in guiding the switch of plant growth from juvenile to adult phases. Here, we review recent progress in understanding the regulation of miR156 expression and how miR156-SPLs mediated plant age affect other processes in Arabidopsis. Powerful high-throughput sequencing techniques have provided rich data to systematically study the regulatory mechanisms of miR156 regulation network. From this data, we draw an expanded miR156-regulated network that links plant developmental transition and other fundamental biological processes, gaining novel and broad insight into the molecular mechanisms of plant-age-related processes in Arabidopsis.

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“…2C). TOE1 blocks the production of trichomes on the abaxial side of the leaf by working in association with the abaxial specification gene KANAD1 ( KAN1 ) to repress the transcription of GLABRA1 ( GL1 ) (Wang et al, 2019; Xu et al, 2019). In WT plants, GL1 expression increased dramatically between 13-14 DAP and 20 DAP, consistent with the increase in trichome production over this period.…”

Section: Resultsmentioning

confidence: 99%

ALTERED MERISTEM PROGRAM1regulates leaf identity independent of miR156-mediated translational repression

Fouracre

Chen

Poethig

2019

Preprint

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Keywords 14Vegetative phase change, shoot apical meristem, miR156, SPL, AMP1, translational 15 repression 16 17 18 Summary statement 19We show that loss of the carboxypeptidase, AMP1, does not interfere with the function 20 of miR156 or miR159, suggesting that AMP1 is not universally required for miRNA-21 mediated translational repression in Arabidopsis. 22 Abstract 24In Arabidopsis, loss of the carboxypeptidase, ALTERED MERISTEM PROGRAM1 25 (AMP1), produces an increase in the rate of leaf initiation, an enlarged shoot apical 26 meristem and an increase in the number of juvenile leaves. This phenotype is also 27 observed in plants with reduced levels of miR156-targeted SQUAMOSA PROMOTER 28 BINDING PROTEIN-LIKE (SPL) transcription factors, suggesting that AMP1 may 29 promote SPL activity. However, we found that the amp1 phenotype is only partially 30 corrected by elevated SPL gene expression, and that amp1 has no significant effect on 31 SPL transcript levels, or on the level or the activity of miR156. Although evidence from 32 a previous study suggests that AMP1 promotes miRNA-mediated translational 33 repression, amp1 did not prevent the translational repression of the miR156 target, 34 SPL9, or the miR159 target, MYB33. These results suggest that AMP1 regulates 35 vegetative phase change downstream of, or in parallel to, the miR156/SPL pathway and 36 that it is not universally required for miRNA-mediated translational repression. 37 38 39 40 41 42 43We then examined the expression of these genes in successive rosette leaf 132 primordia (LP) of plants grown in SD. Because amp1 initiates leaves more rapidly than 133 WT, LP were grouped according to the time of harvest rather than position on the shoot. 134Both the level and rate of decline of miR156 were almost identical in WT and amp1 (Fig. 135

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Age‐dependent heteroblastic development of leaf hairs in Arabidopsis

Cited by 34 publications

References 31 publications

ALTERED MERISTEM PROGRAM1 regulates leaf identity independent of miR156-mediated translational repression

ALTERED MERISTEM PROGRAM1 regulates leaf identity independent of miR156-mediated translational repression

A Regulatory Network for miR156-SPL Module in Arabidopsis thaliana

ALTERED MERISTEM PROGRAM1regulates leaf identity independent of miR156-mediated translational repression

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