Arabidopsis FHY3 and FAR1 integrate light and strigolactone signaling to regulate branching

Xie, Yurong; Liu, Yang; Ma, Ming; Zhou, Qing; Zhao, Yongping; Zhao, Binbin; Wang, Baobao; Wei, Hongbin; Wang, Haiyang

doi:10.1038/s41467-020-15893-7

Cited by 108 publications

(92 citation statements)

References 52 publications

(67 reference statements)

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“…This response does not require active shading, and plants can detect neighbours over some distance via light cues (Roig‐Villanova & Martínez‐García, 2016). Indeed a ‘spike’ of far‐red light is sufficient to induce neighbour detection responses without any difference in the intensity of photosynthetically active wavelengths (Xie et al, 2020). Thus, anticipation of future light limitation is sufficient to modulate growth, in the absence of any underlying resource limitations.…”

Section: Introductionmentioning

confidence: 99%

Wheat plants sense substrate volume and root density to proactively modulate shoot growth

Wheeldon

Walker

Hamon‐Josse

et al. 2020

Plant Cell & Environment

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Plants must carefully coordinate their growth and development with respect to prevailing environmental conditions. To do this, plants can use a range of nutritional and non-nutritional information that allows them to proactively modulate their growth to avoid resource limitations. As is well-known to gardeners and horticulturists alike, substrate volume strongly influences plant growth, and maybe a key source of non-nutritional information for plants. However, the mechanisms by which these substrate volume effects occur remain unclear. Here, we show that wheat plants proactively modulate their shoot growth with respect to substrate volume, independent of nutrient availability. We show that these effects occur in two phases; in the first phase, the dilution of a mobile 'substrate volume-sensing signal' (SVS) allows plants to match their shoot (but not root) growth to the total size of the substrate, irrespective of how much of this they can occupy with their roots. In the second phase, the dilution of a less mobile 'root density-sensing signal' (RDS) allows plants to match root growth to actual rooting volume, with corresponding effects on shoot growth. We show that the effects of soil volume and plant density are largely interchangeable and that plants may use both SVS and RDS to detect their neighbours and to integrate growth responses to both volume and the presence of neighbours. Our work demonstrates the remarkable ability of plants to make proactive decisions about their growth, and has implications for mitigating the effects of dense sowing of crops in agricultural practice.

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Section: Introductionmentioning

confidence: 99%

Wheat plants sense substrate volume and root density to proactively modulate shoot growth

Wheeldon

Walker

Hamon‐Josse

et al. 2020

Plant Cell & Environment

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“…In the model species Arabidopsis thaliana, there are five phytochrome receptors (phyA-phyE). Of these, phyB is the predominant phytochrome that suppresses shade avoidance, as the mutant deficient in phyB displays a Xie et al 2017;Liu et al 2019;Xie et al 2020a, and2020b. constitutive shade avoidance phenotype (Franklin 2008). In addition, phyD and phyE play additional roles in suppressing shade avoidance in response to reduced R/FR ratios (Franklin et al 2003).…”

Section: Light Regulation Of Sas In Arabidopsismentioning

confidence: 99%

Integration of light and hormone signaling pathways in the regulation of plant shade avoidance syndrome

2021

Self Cite

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As sessile organisms, plants are unable to move or escape from their neighboring competitors under high-density planting conditions. Instead, they have evolved the ability to sense changes in light quantity and quality (such as a reduction in photoactive radiation and drop in red/far-red light ratios) and evoke a suite of adaptative responses (such as stem elongation, reduced branching, hyponastic leaf orientation, early flowering and accelerated senescence) collectively termed shade avoidance syndrome (SAS). Over the past few decades, much progress has been made in identifying the various photoreceptor systems and light signaling components implicated in regulating SAS, and in elucidating the underlying molecular mechanisms, based on extensive molecular genetic studies with the model dicotyledonous plant Arabidopsis thaliana. Moreover, an emerging synthesis of the field is that light signaling integrates with the signaling pathways of various phytohormones to coordinately regulate different aspects of SAS. In this review, we present a brief summary of the various cross-talks between light and hormone signaling in regulating SAS. We also present a perspective of manipulating SAS to tailor crop architecture for breeding high-density tolerant crop cultivars.

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“…They form polymer complexes and directly interact with SPL9 and SPL15 to suppress their transcriptional activation of BRC1. Meanwhile, FHY3 and FAR1 upregulate the expression levels of SMXL6 and SMXL7 by binding to their promoter and thus promote branching [ 72 ]. However, the precise regulatory function between CiAGL9 and CiMADS43 , especially within the early flowering and leaf development, remains largely unknown and additional target genes are still to be identified.…”

Section: Discussionmentioning

confidence: 99%

A MADS-Box Gene CiMADS43 Is Involved in Citrus Flowering and Leaf Development through Interaction with CiAGL9

Zhang

Hou

et al. 2021

IJMS

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MADS-box genes are involved in various developmental processes including vegetative development, flower architecture, flowering, pollen formation, seed and fruit development. However, the function of most MADS-box genes and their regulation mechanism are still unclear in woody plants compared with model plants. In this study, a MADS-box gene (CiMADS43) was identified in citrus. Phylogenetic and sequence analysis showed that CiMADS43 is a GOA-like Bsister MADS-box gene. It was localized in the nucleus and as a transcriptional activator. Overexpression of CiMADS43 promoted early flowering and leaves curling in transgenic Arabidopsis. Besides, overexpression or knockout of CiMADS43 also showed leaf curl phenotype in citrus similar to that of CiMADS43 overexpressed in Arabidopsis. Protein–protein interaction found that a SEPALLATA (SEP)-like protein (CiAGL9) interacted with CiMADS43 protein. Interestingly, CiAGL9 also can bind to the CiMADS43 promoter and promote its transcription. Expression analysis also showed that these two genes were closely related to seasonal flowering and the development of the leaf in citrus. Our findings revealed the multifunctional roles of CiMADS43 in the vegetative and reproductive development of citrus. These results will facilitate our understanding of the evolution and molecular mechanisms of MADS-box genes in citrus.

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Arabidopsis FHY3 and FAR1 integrate light and strigolactone signaling to regulate branching

Cited by 108 publications

References 52 publications

Wheat plants sense substrate volume and root density to proactively modulate shoot growth

Wheat plants sense substrate volume and root density to proactively modulate shoot growth

Integration of light and hormone signaling pathways in the regulation of plant shade avoidance syndrome

A MADS-Box Gene CiMADS43 Is Involved in Citrus Flowering and Leaf Development through Interaction with CiAGL9

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