Strigolactone-induced senescence of a bamboo leaf in the dark is alleviated by exogenous sugar

Tian, Mingyi; Jiang, Kai; Takahashi, Ikuo; Li, Guodong

doi:10.1584/jpestics.d18-003

Cited by 34 publications

(24 citation statements)

References 25 publications

(33 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Strigolactones inhibit bud outgrowth and mediate the effect of auxin (Beveridge et al , 2000; Zou et al , 2006; Hayward et al , 2009) as well as the response to different abiotic stresses which modulate strigolactone synthesis (phosphate or nitrogen deficiency) or signaling (drought) (Umehara et al , 2010; Kohlen et al , 2011; Bu et al , 2014; Ha et al , 2014; Saeed et al , 2017). We show that sugar supply is able to repress the inhibitory effect of strigolactones on buds, as it is the case for strigolactone-induced bamboo leaf senescence in dark (Tian et al , 2018). Moreover, rms3 , a strigolactone-perception pea mutant, exhibits a reduced inhibition with decreasing sucrose concentration.…”

Section: Discussionmentioning

confidence: 63%

“…Interestingly, sugars have been reported to have an opposite effect to auxin on cytokinins and strigolactones in different developmental processes (Arrom & Munne-Bosch, 2012; Li et al , 2016; Tian et al , 2018) including in bud outgrowth (Barbier et al , 2015b; Barbier et al , 2019). In our previous study on rose isolated nodal segments grown without auxin (Barbier et al , 2015b), we highlighted that sucrose stimulated bud outgrowth, and that this growth was preceded by down-regulated strigolactone signaling gene expression and increased cytokinin synthesis.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Sugar availability suppresses the auxin-induced strigolactone pathway to promote bud outgrowth

Bertheloot

Barbier

Boudon

et al. 2019

Preprint

View full text Add to dashboard Cite

+33 (0)2 41 22 56 32 2 SUMMARY• Apical dominance occurs when the growing shoot tip inhibits the outgrowth of axillary buds. Apically-derived auxin in the nodal stem indirectly inhibits bud outgrowth via cytokinins and strigolactones. Recently, sugar deprivation was found to contribute to this phenomenon.• Using rose and pea, we investigated whether sugar availability interacts with auxin in bud outgrowth control, and the role of cytokinins and strigolactones, in vitro and in planta.• We show that sucrose antagonizes auxin's effect on bud outgrowth, in a dosedependent and coupled manner. Sucrose also suppresses strigolactone-inhibition of outgrowth, and rms3 strigolactone-perception mutant is less affected by reducing sucrose supply; however, sucrose does not interfere with the regulation of cytokinin levels by auxin, and stimulates outgrowth even with optimal cytokinin supply. These observations were assembled into a computational model where sucrose represses bud response to strigolactones, largely independently of cytokinin levels. It quantitatively captures our observed dose-dependent sucrose-hormones effects on bud outgrowth, and allows us to express outgrowth response to various combinations of auxin and sucrose levels as a simple quantitative law.• This study places sugars in the bud outgrowth regulatory network, and paves the way for better understanding of branching plasticity in response to environmental and genotypic factors.Versailles, France) for providing the seeds of Pisum sativum and GR24. We thank the Environment and Agronomy department of INRA for financial support.

show abstract

Section: Discussionmentioning

confidence: 63%

Section: Introductionmentioning

confidence: 99%

Sugar availability suppresses the auxin-induced strigolactone pathway to promote bud outgrowth

Bertheloot

Barbier

Boudon

et al. 2019

Preprint

View full text Add to dashboard Cite

show abstract

“…Strigolactones inhibit bud outgrowth and mediate the effect of auxin (Beveridge et al, 2000;Zou et al, 2006;Hayward et al, 2009) as well as the response to different abiotic stresses that modulate strigolactone synthesis (phosphate or nitrogen deficiency) or signalling (drought) (Umehara et al, 2010;Kohlen et al, 2011;Bu et al, 2014;Ha et al, 2014;Saeed et al, 2017). We show that sugar supply is able to repress the inhibitory effect of strigolactones on buds, as is the case for strigolactone-induced bamboo leaf senescence in the dark (Tian et al, 2018). Moreover, rms3, a strigolactone-perception pea mutant, exhibited a reduced inhibition with decreasing sucrose concentration.…”

Section: Researchmentioning

confidence: 71%

“…Interestingly, sugars have been reported to have an opposite effect to auxin on cytokinins and strigolactones in different developmental processes (Arrom & Munne-Bosch, 2012;Tian et al, 2018) including in bud outgrowth (Barbier et al, 2015b;Barbier et al, 2019). In our previous study on rose isolated nodal segments grown without auxin (Barbier et al, 2015b), we highlighted that sucrose stimulated bud outgrowth and that this growth was preceded by downregulated strigolactone signalling gene expression and increased cytokinin synthesis.…”

Section: Introductionmentioning

confidence: 89%

Sugar availability suppresses the auxin‐induced strigolactone pathway to promote bud outgrowth

et al. 2019

View full text Add to dashboard Cite

Summary Apical dominance occurs when the growing shoot tip inhibits the outgrowth of axillary buds. Apically‐derived auxin in the nodal stem indirectly inhibits bud outgrowth via cytokinins and strigolactones. Recently, sugar deprivation was found to contribute to this phenomenon. Using rose and pea, we investigated whether sugar availability interacts with auxin in bud outgrowth control, and the role of cytokinins and strigolactones, in vitro and in planta. We show that sucrose antagonises auxin’s effect on bud outgrowth, in a dose‐dependent and coupled manner. Sucrose also suppresses strigolactone inhibition of outgrowth and the rms3 strigolactone‐perception mutant is less affected by reducing sucrose supply. However, sucrose does not interfere with the regulation of cytokinin levels by auxin and stimulates outgrowth even with optimal cytokinin supply. These observations were assembled into a computational model in which sucrose represses bud response to strigolactones, largely independently of cytokinin levels. It quantitatively captures our observed dose‐dependent sucrose‐hormones effects on bud outgrowth and allows us to express outgrowth response to various combinations of auxin and sucrose levels as a simple quantitative law. This study places sugars in the bud outgrowth regulatory network and paves the way for a better understanding of branching plasticity in response to environmental and genotypic factors.

show abstract

“…Overall, our results suggest an intricate relationship among sugar starvation, senescence and SL 517 biosynthesis and signalling in excised inflorescences. This is supported by a recent study finding 518 that the SL-induced senescence of bamboo leaves was supressed by exogenous sugar treatment 519 (Tian et al, 2018). SLs do not appear to have a major role in the inflorescences during the normal 520 night but are synthesised during the extended night, perhaps in response to sustained low sugar 521 content and consequent senescence initiation.…”

Section: Sl Signalling But Not Biosynthetic Genes Respond Rapidly To mentioning

confidence: 70%

Strigolactone defective mutants of Arabidopsis exhibit delayed sepal senescence

Jibran

Wang

et al. 2020

Preprint

View full text Add to dashboard Cite

12 13 One-sentence summary: Two novel mutants in the strigolactone pathway demonstrate a role for 14 the hormone in sepal senescence, and transcriptional analysis highlights interaction between 15 strigolactones and sugar signalling. 16 17 Author contributions: 18 XX, PPD and DAH conceived and designed experiments; XX, RJ and AE did mutant screening; HB 19 oversaw transient expression, LCMS and QTOF analysis and XX, YW, LD and KF did the analysis; XX 20 and AM did statistics; XX and AH performed nCounter; AS generated figures for crystal structures. 21 HB and KF wrote LCMS and QTOF method sections. XX, PPD, and DAH wrote the manuscript. All 22 authors read and approved the manuscript. 23 24 Affiliations: 25 Abstract 32Flower sepals are critical for flower development and vary greatly in lifespan depending on their 33 function postpollination. However, very little is known on what controls sepal longevity. Using a 34 sepal senescence mutant screen, we directly connected strigolactones (SL) with sepal longevity. 35 We identified two Arabidopsis mutants that harbour novel mutations in the SL biosynthetic gene 36 MORE AXILLARY GROWTH1 (MAX1) and receptor DWARF14 (AtD14). The mutation in AtD14 caused 37 a substitution of the catalytic Ser-97 to Phe in the enzyme active site. The lesion in MAX1 changed 38 a highly conserved Gly-469 to Arg in the haem-iron ligand signature of the cytochrome P450 39 protein, which caused loss-of-function of MAX1. nCounter-based transcriptional analysis suggested 40 an interaction between SL and sugar signalling in controlling dark-induced inflorescence 41 senescence. The results uncover an important function for SL in regulating floral organ senescence 42 in addition to its other diverse functions in plant development and stress response. 43 44 2

show abstract

Strigolactone-induced senescence of a bamboo leaf in the dark is alleviated by exogenous sugar

Cited by 34 publications

References 25 publications

Sugar availability suppresses the auxin-induced strigolactone pathway to promote bud outgrowth

Sugar availability suppresses the auxin-induced strigolactone pathway to promote bud outgrowth

Sugar availability suppresses the auxin‐induced strigolactone pathway to promote bud outgrowth

Strigolactone defective mutants of Arabidopsis exhibit delayed sepal senescence

Contact Info

Product

Resources

About