Beyond YABBYs: a Focus on Versatility and Interactivity

Palermo, Bruna Rafaella Zanardi; Dornelas, Marcelo Carnier

doi:10.1007/s12042-020-09275-y

Cited by 4 publications

(4 citation statements)

References 109 publications

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“…Finally, we found 19 genes interacting with SL1 and the transcription factor OsYABBY5 caught our attention (Supplementary Table S1). YABBY genes are expressed in lateral organs, promoting the formation of floral organs and consequently terminating FM activation during floral development (Palermo & Dornelas, 2021; Zhang et al., 2020). In rice, five out of the eight YABBY genes, including DL , play a crucial role in spikelet development (Zhang et al., 2020).…”

Section: Resultsmentioning

confidence: 99%

STAMENLESS1 activates SUPERWOMAN 1 and FLORAL ORGAN NUMBER 1 to control floral organ identities and meristem fate in rice

Zhuang,

Li,

Zhao

et al. 2024

The Plant Journal

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SUMMARYFloral patterns are unique to rice and contribute significantly to its reproductive success. SL1 encodes a C2H2 transcription factor that plays a critical role in flower development in rice, but the molecular mechanism regulated by it remains poorly understood. Here, we describe interactions of the SL1 with floral homeotic genes, SPW1, and DL in specifying floral organ identities and floral meristem fate. First, the sl1 spw1 double mutant exhibited a stamen‐to‐pistil transition similar to that of sl1, spw1, suggesting that SL1 and SPW1 may located in the same pathway regulating stamen development. Expression analysis revealed that SL1 is located upstream of SPW1 to maintain its high level of expression and that SPW1, in turn, activates the B‐class genes OsMADS2 and OsMADS4 to suppress DL expression indirectly. Secondly, sl1 dl displayed a severe loss of floral meristem determinacy and produced amorphous tissues in the third/fourth whorl. Expression analysis revealed that the meristem identity gene OSH1 was ectopically expressed in sl1 dl in the fourth whorl, suggesting that SL1 and DL synergistically terminate the floral meristem fate. Another meristem identity gene, FON1, was significantly decreased in expression in sl1 background mutants, suggesting that SL1 may directly activate its expression to regulate floral meristem fate. Finally, molecular evidence supported the direct genomic binding of SL1 to SPW1 and FON1 and the subsequent activation of their expression. In conclusion, we present a model to illustrate the roles of SL1, SPW1, and DL in floral organ specification and regulation of floral meristem fate in rice.

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Section: Resultsmentioning

confidence: 99%

STAMENLESS1 activates SUPERWOMAN 1 and FLORAL ORGAN NUMBER 1 to control floral organ identities and meristem fate in rice

Zhuang,

Li,

Zhao

et al. 2024

The Plant Journal

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“…When Ch applied to the tobacco seedlings, defective leaf formation observed (Figure 2), and after the treatment of Ch during the post-germination growth phase, the expression of AS1, KAN1,YAB3,and FIL genes decreased,69,45,46, and 68% respectively (Figure 5), which have a critical role in building leaf polarity through inactivation of KNOX expression (Bowman and Eshed, 2000;Palermo and Dornelas, 2020). According to the previous findings on Ch, it was shown that this compound inhibits SUV39H1 and G9a…”

Section: Discussionmentioning

confidence: 99%

“…Especially, repression of KNOX genes by FIL and YAB3 is essential for the initiation of the cellular differentiation process to form leaves (Kumaran et al, 2002). It has been shown that multiple mutations on leaf polarity genes give rise to ectopic expression of KNOX and WUS genes that allow SAM structure to re-establish and thereby promote the loss of leaf identity (Kumaran et al, 2002;Eshed et al, 2004;Sarojam et al, 2010;Palermo and Dornelas, 2020). Besides transcriptional regulation, post-translational modifications (PTMs) such as methylation, acetylation, and phosphorylation of the protein tails of the core histones, are critical for controlling gene expression in plant development (Liu et al, 2010;Berr et al, 2011;Singh et al, 2020).…”

Section: Introductionmentioning

confidence: 99%

Chaetocin enhances callus induction by decreasing the expression of major leaf polarity genes in Nicotiana tabacum

Ebrahimi¹,

Özsoy²,

Gürle³

et al. 2021

Turk J Bot

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Using chemicals known as inhibitors of chromatin remodeling enzymes is a useful approach in understanding the regulation machinery that contributes to the maintenance of or conversion to a pluri-and totipotent states of the cells in multicellular organisms.They can serve as tools to reveal the molecular and cellular mechanisms required for reprogramming. A deeper understanding of reprogramming pathways that drive the cell into a dedifferentiated state might help us enhance plant micropropagation and green biotechnology applications. Chaetocin is one of the histone methyltransferase inhibitors known as key drivers in several cellular processes. It was shown that chaetocin enhanced the reprogramming of human fibroblasts. Here, by using an analogy approach, we tested the effects of chaetocin on the post-germination growth and callus induction in Nicotiana tabacum for the first time. We found that chaetocin retarded the leaf development in N. tabacum seedlings but increased the callus formation when applied in the postgermination growth phase (1.4 fold). The expression of AS1, KAN1, YAB3, FIL, major leaf polarity genes, significantly decreased when seeds were treated with Ch during the post-germination growth phase, 69, 45, 46, 68%, respectively. We also observed that chaetocin could not replace 2,4-Dichlorophenoxyacetic acid as a callus inducing modulator. The present study is a pioneer, exhibiting valuable data to understand the molecular mechanisms underlying the effects of chaetocin and unknown properties of histone-modifying enzymes. Hence, novel approaches can be developed by using high throughput methods to elucidate epigenetic mechanisms of cellular differentiation/dedifferentiation processes in plant systems.

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“…The YABBY (YAB) proteins comprise a flowering plant-specific family of transcription factors that regulate plant development, morphogenesis, and stress responses (Zhang et al, 2020;Palermo & Dornelas, 2021); members of the rice OsYAB family have been reported to play a role in panicle and spikelet development (Yamaguchi et al, 2004;Tanaka et al, 2012Tanaka et al, , 2017. YAB proteins are characterized by two conserved domains: an N-terminal C 2 H 2 zinc-finger domain and a C-terminal helix-loop-helix domain, that is, the YABBY domain (Bowman & Smyth, 1999).…”

Section: Introductionmentioning

confidence: 99%

THERMOSENSITIVE BARREN PANICLE (TAP) is required for rice panicle and spikelet development at high ambient temperature

Zhang

Zhu

et al. 2022

New Phytologist

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Summary In cereal plants, the size of the panicle (inflorescence) is a critical factor for yield. Panicle size is determined by a complex interplay of genetic and environmental factors, but the mechanisms underlying adaptations to temperature stress during panicle development remain largely unknown. We identify the rice THERMOSENSITIVE BARREN PANICLE (TAP) gene, which encodes a transposase‐derived FAR1‐RELATED SEQUENCE (FRS) protein and is responsible for regulating panicle and spikelet development at high ambient temperature. The tap mutants display high temperature‐dependent reproductive abnormalities, including compromised secondary branch and spikelet initiation and pleiotropic floral organ defects. Consistent with its thermosensitive phenotype, TAP expression is induced by high temperature. TAP directly promotes the expression of OsYABBY3 (OsYAB3), OsYAB4, and OsYAB5, which encode key transcriptional regulators in panicle and spikelet development. In addition, TAP physically interacts with OsYAB4 and OsYAB5 proteins; phenotypic analysis of osyab4 tap‐1 and osyab5 tap‐1 double mutants indicates that TAP–OsYAB4/OsYAB5 complexes act to maintain normal panicle and spikelet development. Taken together, our study reveals the novel role of a TE‐derived transcription factor in controlling rice panicle development under high ambient temperatures, shedding light on the molecular mechanism underlying the adaptation of cereal crops to increasing environmental temperatures.

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Beyond YABBYs: a Focus on Versatility and Interactivity

Cited by 4 publications

References 109 publications

STAMENLESS1 activates SUPERWOMAN 1 and FLORAL ORGAN NUMBER 1 to control floral organ identities and meristem fate in rice

STAMENLESS1 activates SUPERWOMAN 1 and FLORAL ORGAN NUMBER 1 to control floral organ identities and meristem fate in rice

Chaetocin enhances callus induction by decreasing the expression of major leaf polarity genes in Nicotiana tabacum

THERMOSENSITIVE BARREN PANICLE (TAP) is required for rice panicle and spikelet development at high ambient temperature

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