Antagonistic action of <i>TILLERS ABSENT1</i> and <i>FLORAL ORGAN NUMBER2</i> regulates stem cell maintenance during axillary meristem development in rice

Tanaka, Wakana; Hirano, Hideki

doi:10.1111/nph.16163

Cited by 19 publications

(34 citation statements)

References 45 publications

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“…Expression of the stem cell marker FON2 is observed at the initial stages of axillary meristem development at almost the same time as the appearance of the bulge of the premeristem zone (Fig. 2A, stage 1) (Tanaka and Hirano 2020). This suggests that stem cell identity is established very early in development of the axillary meristem.…”

Section: Stem Cell Maintenance During Axillary Meristem Development In Ricementioning

confidence: 75%

“…The tab1 mutant has a normal SAM and produces the same number of leaves in the primary shoot as wild type. In addition, the stem cell marker FON2 and undifferentiated cell marker OSH1, an ortholog of STM, are expressed similarly in the SAM in both tab1 and wild-type (Tanaka et al 2015, Tanaka andHirano 2020). Collectively, these results indicate that TAB1 does not function in stem cell maintenance in the SAM.…”

Section: Stem Cell Maintenance In Established Meristems In Ricementioning

confidence: 86%

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Stem Cell Maintenance in the Shoot Apical Meristems and during Axillary Meristem Development

Hirano

Tanaka

2020

CYTOLOGIA

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In plants, the shoot apical meristem (SAM), which is formed during embryogenesis, plays a crucial role in postembryonic development of the above-ground shoots. The SAM harbors pluripotent stem cells, which provide daughter cells to differentiate lateral organs and stems. As the plant grows, the primary shoot generates the axillary meristems, which are responsible for secondary shoot development. During the development of axillary meristem, stem cells must be established and maintained to build up the axillary meristems. While the mechanism underlying stem cell maintenance in the SAM, including the WUSCHEL-CLAVATA negative feedback loop, has been well elucidated, studies on the regulation of stem cell maintenance during axillary meristem development have only just begun. In this minireview, we describe the genetic mechanisms underlying stem cell maintenance in both the established SAM and the developing axillary meristem in two model plants, Arabidopsis thaliana and Oryza sativa (rice). We also discuss the function of genes that are specific or shared between the established and developing meristems or between Arabidopsis and rice.

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Section: Stem Cell Maintenance During Axillary Meristem Development In Ricementioning

confidence: 75%

Section: Stem Cell Maintenance In Established Meristems In Ricementioning

confidence: 86%

Stem Cell Maintenance in the Shoot Apical Meristems and during Axillary Meristem Development

Hirano

Tanaka

2020

CYTOLOGIA

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“…Notwithstanding, single-and double-knock-out mutants of ZmWUS and possibly other WOX genes are needed to identify the role of ZmWUS1 and ZmWUS2 in maize meristems. This is important because in monocots WUS orthologs may play a different function than that reported in Arabidopsis, given that the rice WUS ortholog is not required for SAM maintenance (Lu et al 2015;Tanaka et al 2015;Nardmann and Werr 2006;Tanaka and Hirano 2020).…”

Section: The Regulation Of Maize Inflorescence Meristem Size and Funcmentioning

confidence: 97%

Improving architectural traits of maize inflorescences

Chen

Gallavotti

2021

Mol Breeding

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The domestication and improvement of maize resulted in radical changes in shoot architecture relative to its wild progenitor teosinte. In particular, critical modifications involved a reduction of branching and an increase in inflorescence size to meet the needs for human consumption and modern agricultural practices. Maize is a major contributor to global agricultural production by providing large and inexpensive quantities of food, animal feed, and ethanol. Maize is also a classic system for studying the genetic regulation of inflorescence formation and its enlarged female inflorescences directly influence seed production and yield. Studies on the molecular and genetic networks regulating meristem proliferation and maintenance, including receptor-ligand interactions, transcription factor regulation, and hormonal control, provide important insights into maize inflorescence development and reveal potential avenues for the targeted modification of specific architectural traits. In this review, we summarize recent findings on the molecular mechanisms controlling inflorescence formation and discuss how this knowledge can be applied to improve maize productivity in the face of present and future environmental challenges.

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“…Genetically, FCP1 and FCP2 function redundantly to maintain SAM activity independently from FON1 [31]. Notably, the interaction between FON2 and the rice ortholog of WUS, named TILLERS ABSENT1 (TAB1; also called OsWUS), happens in a slightly different scenario where TAB1 is only required to maintain stem cells during axillary meristem development with FON2 restricting its expression [32]. It is likely that the FON2-TAB1 pathway has been recruited to play a specific role within a narrow developmental window in rice during evolution.…”

Section: Pathwaymentioning

confidence: 99%

Molecular Insights into Inflorescence Meristem Specification for Yield Potential in Cereal Crops

Wang

Yang

2021

IJMS

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Flowering plants develop new organs throughout their life cycle. The vegetative shoot apical meristem (SAM) generates leaf whorls, branches and stems, whereas the reproductive SAM, called the inflorescence meristem (IM), forms florets arranged on a stem or an axis. In cereal crops, the inflorescence producing grains from fertilized florets makes the major yield contribution, which is determined by the numbers and structures of branches, spikelets and florets within the inflorescence. The developmental progression largely depends on the activity of IM. The proper regulations of IM size, specification and termination are outcomes of complex interactions between promoting and restricting factors/signals. Here, we focus on recent advances in molecular mechanisms underlying potential pathways of IM identification, maintenance and differentiation in cereal crops, including rice (Oryza sativa), maize (Zea mays), wheat (Triticum aestivum), and barley (Hordeum vulgare), highlighting the researches that have facilitated grain yield by, for example, modifying the number of inflorescence branches. Combinatorial functions of key regulators and crosstalk in IM determinacy and specification are summarized. This review delivers the knowledge to crop breeding applications aiming to the improvements in yield performance and productivity.

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Antagonistic action of TILLERS ABSENT1 and FLORAL ORGAN NUMBER2 regulates stem cell maintenance during axillary meristem development in rice

Cited by 19 publications

References 45 publications

Stem Cell Maintenance in the Shoot Apical Meristems and during Axillary Meristem Development

Stem Cell Maintenance in the Shoot Apical Meristems and during Axillary Meristem Development

Improving architectural traits of maize inflorescences

Molecular Insights into Inflorescence Meristem Specification for Yield Potential in Cereal Crops

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