Fine-tuning regulation of strigolactone biosynthesis under phosphate starvation

“…Levels of SLs in roots are significantly increased in a number of plant species when plants are grown under Pi deficient conditions [2–5,129,130]. While Pi starvation-dependent stimulation of SL production appeared to be specific in red clover [4], in sorghum, 5-deoxystrigol content was increased by both Pi and N deficiency [3].…”

Section: Pi Deficiency Stimulates Sl Biosynthesis and Exudationmentioning

confidence: 99%

“…It was found that elevated SL levels in plants grown under Pi deficient conditions are normally accompanied by a suppression of bud outgrowth and shoot branching [2–5,91,129], one of the best characterized phenotypic traits regulated by SLs. Furthermore, the suppression of Oryza sativa tiller bud outgrowth [5] and Arabidopsis shoot branching [91] under Pi deficient conditions does not occur in SL-deficient and -insensitive mutants.…”

Section: Pi Deficiency Stimulates Sl Biosynthesis and Exudationmentioning

confidence: 99%

A Dual Role of Strigolactones in Phosphate Acquisition and Utilization in Plants

Czarnecki

Yang

Weston

et al. 2013

IJMS

113

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Phosphorus, acquired in the form of phosphate (Pi), is one of the primary macronutrients for plants but is least available in the soil. Pi deficiency is a major factor limiting plant growth, development and reproduction. Plants have developed a complex signaling network to respond to Pi deficiency. The recent discovery of strigolactones, a new class of plant hormones, has led to an emerging signaling module illustrating the integrated control of Pi acquisition, plant-microbe symbiotic interactions and plant architecture. This review article focuses on the recent findings of plant responses and roles of strigolactones to Pi deficiency.

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“…However, despite the availability of several transcriptome data sets (30 -33), strigolactone-regulated transcription factors and strigolactone-responsive genes are rare, of which BRANCHED1 (BRC1) is one of the best known in Arabidopsis thaliana (34). On the whole, only a few differentially expressed genes, often with low differences in expression levels, were identified upon rac-GR24 treatment, a synthetic strigolactone analog (31)(32)(33)(34). Of last, several studies have emerged that support strigolactone signaling occurring to a large extent at the protein level (29,35,36), as illustrated by the direct effect of strigolactones on PIN-FORMED1 (PIN1) recycling at the plasma membrane in xylem parenchyma cells that results in modified auxin flows in the stem and, finally, altered shoot branching (35,37).…”

mentioning

confidence: 99%

The Response of the Root Proteome to the Synthetic Strigolactone GR24 in Arabidopsis

Walton¹,

Stes²,

Goeminne³

et al. 2016

Molecular & Cellular Proteomics

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Strigolactones are plant metabolites that act as phytohormones and rhizosphere signals. Whereas most research on unraveling the action mechanisms of strigolactones is focused on plant shoots, we investigated proteome adaptation during strigolactone signaling in the roots of Arabidopsis thaliana. Through large-scale, time-resolved, and quantitative proteomics, the impact of the strigolactone analog rac-GR24 was elucidated on the root proteome of the wild type and the signaling mutant more axillary growth 2 (max2). Our study revealed a clear MAX2-dependent rac-GR24 response: an increase in abundance of enzymes involved in flavonol biosynthesis, which was reduced in the max2-1 mutant. Mass spectrometry-driven metabolite profiling and thin-layer chromatography experiments demonstrated that these changes in protein expression lead to the accumulation of specific flavonols. Moreover, quantitative RT-PCR revealed that the flavonolrelated protein expression profile was caused by rac-GR24-induced changes in transcript levels of the corresponding genes. This induction of flavonol production was shown to be activated by the two pure enantiomers that together make up rac-GR24. Finally, our data provide much needed clues concerning the multiple roles played by MAX2 in the roots and a comprehensive view of the rac-GR24-induced

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Fine-tuning regulation of strigolactone biosynthesis under phosphate starvation

Cited by 42 publications

References 25 publications

Strigolactones as mediators of plant growth responses to environmental conditions

Strigolactones as mediators of plant growth responses to environmental conditions

A Dual Role of Strigolactones in Phosphate Acquisition and Utilization in Plants

The Response of the Root Proteome to the Synthetic Strigolactone GR24 in Arabidopsis

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