Strigolactones are positive regulators of light-harvesting genes in tomato

Mayzlish-Gati, Einav; Lekkala, Sivarama Prasad; Resnick, Nathalie; Wininger, Smadar; Bhattacharya, Chaitali; Lemcoff, Jorge Hugo; Kapulnik, Yoram; Koltai, Hinanit

doi:10.1093/jxb/erq138

Cited by 98 publications

(79 citation statements)

References 36 publications

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“…SLs have also been shown to positively regulate the expression of light-harvesting genes (Mayzlish-Gati et al 2010). Because light harvesting is directly related to sugar acquisition in seedlings, a low hexose content is likely to result from the low-efficiency photosynthesis of the mutants.…”

Section: Discussionmentioning

confidence: 99%

Strigolactones are involved in sugar signaling to modulate early seedling development in <i>Arabidopsis</i>

Jiang

et al. 2016

Plant Biotechnology

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Strigolactones are a novel class of plant hormones that interact with multiple signaling molecules, including auxin, abscisic acid, ethylene, and brassinosteroid, to regulate plant growth and development. Recently, researchers have shown that sugars are involved in bud outgrowth control, suggesting a potential interaction between sugars and strigolactone signaling. To better understand the relationship between strigolactones and sugar in plant development, the sugar sensitivity of strigolactone biosynthesis and signaling mutants (max1 and max2) was evaluated in early seedling development with a low-glucose assay. Both max1 and max2 displayed obvious hyposensitivity to glucose repression, as do gin mutants, but they were hypersensitive like the wild type to the high-glucose conditions used for gin mutant screening. The strigolactones acted synergistically with glucose in repressing seedling establishment. A further comparative transcriptomic analysis indicated that the expression of stress-related genes in the max2 mutant is impaired by glucose, and a carbohydrate analysis revealed a reduced hexose content in the max mutants. Our results suggest that the roles of strigolactones in the regulation of early seedling development are probably independent of the HXK1 signaling pathway. Taken together, these findings provide evidence that strigolactones are involved in sugar signaling, thus modulating early seedling development.

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Section: Discussionmentioning

confidence: 99%

Strigolactones are involved in sugar signaling to modulate early seedling development in <i>Arabidopsis</i>

Jiang

et al. 2016

Plant Biotechnology

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“…Gene‐specific primers (Table S1, Supporting Information) were then used in qRT‐PCR analysis on a Rotor‐Gene 6000 instrument (Corbett‐Qiagen, Valencia, CA) following a previously described protocol (Mayzlish‐Gati et al. 2010). The threshold cycle (Ct) was automatically determined by Rotor‐Gene 6000 software, and the relative expression levels of target genes were calculated using “two standard curves” (i.e., that of the gene of interest and that of actin) implemented in the Rotor‐Gene software.…”

Section: Methodsmentioning

confidence: 99%

Intraspecific variation in defense against a generalist lepidopteran herbivore in populations of Eruca sativa (Mill.)

Ogran

Landau

Hanin

et al. 2016

Ecology and Evolution

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Populations of Eruca sativa (Brassicaceae) from desert and Mediterranean (Med) habitats in Israel differ in their defense against larvae of the generalist Spodoptera littoralis but not the specialist Pieris brassicae. Larvae of the generalist insect feeding on plants of the Med population gained significantly less weight than those feeding on the desert plants, and exogenous application of methyl jasmonate (MJ) on leaves of the Med plants significantly reduced the level of damage created by the generalist larvae. However, MJ treatment significantly induced resistance in plants of the desert population, whereas the generalist larvae caused similar damage to MJ‐induced and noninduced plants. Analyses of glucosinolates and expression of genes in their synthesis pathway indicated that defense in plants of the Med population against the generalist insect is governed by the accumulation of glucosinolates. In plants of the desert population, trypsin proteinase inhibitor activity was highly induced in response to herbivory by S. littoralis. Analysis of genes in the defense‐regulating signaling pathways suggested that in response to herbivory, differences between populations in the induced levels of jasmonic acid, ethylene, and salicylic acid mediate the differential defenses against the insect. In addition, expression analysis of myrosinase‐associated protein NSP2 suggested that in plants of the desert population, glucosinolates breakdown products were primarily directed to nitrile production. We suggest that proteinase inhibitors provide an effective defense in the desert plants, in which glucosinolate production is directed to the less toxic nitriles. The ecological role of nitrile production in preventing infestation by specialists is discussed.

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“…The presence in the cork oak bud transcriptome of genes codifying enzymes involved in the ubiquitin-proteasome system, such as ubiquitin E3-ligase, expressed in the early stages of bud sprouting, could be linked with the involvement of MAX2 in strigolactone or ABA signaling, since the number of E3 ligases involved is more than any other hormone [50]. In the early stages, genes codifying indole-3-acetic acid (IAA), which, together with ubiquitin E3-ligase, plays a crucial role in auxin signaling [51], were also identified. Considering that auxins are capable of regulating the activity of strigolactones, which can inhibit bud growth, and that cytokinins can stimulate bud growth [52], it is essential to identify the intermediate steps to understand the mechanism of this antagonistic control.…”

Section: Cork Oak Bud Burst and Development Is Under Tight Hormonal Rmentioning

confidence: 99%

Comprehensive Analysis of the Cork Oak (Quercus suber) Transcriptome Involved in the Regulation of Bud Sprouting

Usié

Simões

Barbosa

et al. 2017

Forests

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Cork oaks show a high capacity of bud sprouting as a response to injury, which is important for species survival when dealing with external factors, such as drought or fires. The characterization of the cork oak transcriptome involved in the different stages of bud sprouting is essential to understanding the mechanisms involved in these processes. In this study, the transcriptional profile of different stages of bud sprouting, namely (1) dormant bud and (2) bud swollen, vs. (3) red bud and (4) open bud, was analyzed in trees growing under natural conditions. The transcriptome analysis indicated the involvement of genes related with energy production (linking the TCA (tricarboxylic acid) cycle and the electron transport system), hormonal regulation, water status, and synthesis of polysaccharides. These results pinpoint the different mechanisms involved in the early and later stages of bud sprouting. Furthermore, some genes, which are involved in bud development and conserved between species, were also identified at the transcriptional level. This study provides the first set of results that will be useful for the discovery of genes related with the mechanisms regulating bud sprouting in cork oak.

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Strigolactones are positive regulators of light-harvesting genes in tomato

Cited by 98 publications

References 36 publications

Strigolactones are involved in sugar signaling to modulate early seedling development in <i>Arabidopsis</i>

Strigolactones are involved in sugar signaling to modulate early seedling development in <i>Arabidopsis</i>

Intraspecific variation in defense against a generalist lepidopteran herbivore in populations of Eruca sativa (Mill.)

Comprehensive Analysis of the Cork Oak (Quercus suber) Transcriptome Involved in the Regulation of Bud Sprouting

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