Effects of gibberellin and strigolactone on rice tiller bud growth

Ito, Shinsaku; Yamagami, Daichi; Asami, Tadao

doi:10.1584/jpestics.d18-013

Cited by 13 publications

(8 citation statements)

References 28 publications

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“…According to this, the D14-SLR1 interaction is competitive with the GA-bound GID1-SLR1 physical interaction (Nakamura et al 2013). Both SL and GA repress the elongation of tillering buds, and exogenous application of both hormones reduces tillering (Ito et al 2018b). Exogenous treatment with GA results in shoot elongation, whereas SL treatment does not (Nakamura et al 2013).…”

Section: Sl Hormonal Cross Talkmentioning

confidence: 98%

The Role of Dwarfing Traits in Historical and Modern Agriculture with a Focus on Rice

Ferrero‐Serrano

Cantos

Assmann

2019

Cold Spring Harb Perspect Biol

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Semidwarf stature is a valuable agronomic trait in grain crops that reduces lodging and increases harvest index. A fundamental advance during the 1960s Green Revolution was the introduction of semidwarf cultivars of rice and wheat. Essentially, all semidwarf varieties of rice under cultivation today owe their diminished stature to a specific null mutation in the gibberellic acid (GA) biosynthesis gene, SD1. However, it is now well-established that, in addition to GAs, brassinosteroids and strigolactones also control plant height. In this review, we describe the synthesis and signaling pathways of these three hormones as understood in rice and discuss the mutants and transgenics in these pathways that confer semidwarfism and other valuable architectural traits. We propose that such genes offer underexploited opportunities for broadening the genetic basis and germplasm in semidwarf rice breeding.

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Section: Sl Hormonal Cross Talkmentioning

confidence: 98%

The Role of Dwarfing Traits in Historical and Modern Agriculture with a Focus on Rice

Ferrero‐Serrano

Cantos

Assmann

2019

Cold Spring Harb Perspect Biol

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“…SLs and GAs have similar perception and signaling mechanisms [104,105]. Shoot elongation and tiller bud outgrowth seem to be under the control of the crosstalk between SLs and GAs [106]. However, the outcome of this crosstalk might depend on the process under analysis.…”

Section: Other Pgrsmentioning

confidence: 99%

Interactions of Gibberellins with Phytohormones and Their Role in Stress Responses

Castro-Camba¹,

Sánchez²,

Vidal³

et al. 2022

Horticulturae

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Gibberellins are amongst the main plant growth regulators. Discovered over a century ago, the interest in gibberellins research is growing due to their current and potential applications in crop production and their role in the responses to environmental stresses. In the present review, the current knowledge on gibberellins’ homeostasis and modes of action is outlined. Besides this, the complex interrelations between gibberellins and other plant growth regulators are also described, providing an intricate network of interactions that ultimately drives towards precise and specific gene expression. Thus, genes and proteins identified as being involved in gibberellin responses in model and non-model species are highlighted. Furthermore, the molecular mechanisms governing the gibberellins’ relation to stress responses are also depicted. This review aims to provide a comprehensive picture of the state-of-the-art of the current perceptions of the interactions of gibberellins with other phytohormones, and their responses to plant stresses, thus allowing for the identification of the specific mechanisms involved. This knowledge will help us to improve our understanding of gibberellins’ biology, and might help increase the biotechnological toolbox needed to refine plant resilience, particularly under a climate change scenario.

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“…The effect of GAs on bud outgrowth varies strongly among species. GAs inhibit shoot branching in rice (Lo et al, 2008; Ito et al, 2018), bahiagrass (Agharkar et al, 2007), Arabidopsis (Silverstone et al, 1997), hybrid aspen (Mauriat et al, 2011), and tomato (Martinez-Bello et al, 2015). The exact mechanism behind their effect remains elusive and might be linked to the modification of SL biosynthesis (Ito et al, 2017) and an increase of sugar sink strength (see below) (Buskila et al, 2016).…”

Section: Hormonal Regulation Of Bud Outgrowthmentioning

confidence: 99%

Light Regulation of Axillary Bud Outgrowth Along Plant Axes: An Overview of the Roles of Sugars and Hormones

et al. 2019

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Apical dominance, the process by which the growing apical zone of the shoot inhibits bud outgrowth, involves an intricate network of several signals in the shoot. Auxin originating from plant apical region inhibits bud outgrowth indirectly. This inhibition is in particular mediated by cytokinins and strigolactones, which move from the stem to the bud and that respectively stimulate and repress bud outgrowth. The action of this hormonal network is itself modulated by sugar levels as competition for sugars, caused by the growing apical sugar sink, may deprive buds from sugars and prevents bud outgrowth partly by their signaling role. In this review, we analyze recent findings on the interaction between light, in terms of quantity and quality, and apical dominance regulation. Depending on growth conditions, light may trigger different pathways of the apical dominance regulatory network. Studies pinpoint to the key role of shoot-located cytokinin synthesis for light intensity and abscisic acid synthesis in the bud for R:FR in the regulation of bud outgrowth by light. Our analysis provides three major research lines to get a more comprehensive understanding of light effects on bud outgrowth. This would undoubtedly benefit from the use of computer modeling associated with experimental observations to deal with a regulatory system that involves several interacting signals, feedbacks, and quantitative effects.

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Effects of gibberellin and strigolactone on rice tiller bud growth

Cited by 13 publications

References 28 publications

The Role of Dwarfing Traits in Historical and Modern Agriculture with a Focus on Rice

The Role of Dwarfing Traits in Historical and Modern Agriculture with a Focus on Rice

Interactions of Gibberellins with Phytohormones and Their Role in Stress Responses

Light Regulation of Axillary Bud Outgrowth Along Plant Axes: An Overview of the Roles of Sugars and Hormones

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