ROS Signaling in Seed Dormancy Alleviation

El-Maarouf-Bouteau, Hayat; Job, Claudette; Job, Dominique; Corbineau, Françoise; Bailly, Christophe

doi:10.4161/psb.2.5.4460

Cited by 28 publications

(16 citation statements)

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“…In general, increases in ROS are required for seed germination (Ogawa and Iwabuchi 2001;Bouteau et al 2007;Bouteau and Bailly 2008). For example, previous data have shown that the inhibition of catalase (a H 2 O 2 scavenging enzyme) can accelerate dormancy release (Hendricks and Taylorson 1975).…”

Section: Discussionmentioning

confidence: 97%

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The effects of temperature on the germination behavior of white, yellow, red and purple maize plant seeds

et al. 2015

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Even though seeds are hidden inside fruit, they differ in color; an interesting, but puzzling, phenomenon. Here, the antioxidant capacities of white, yellow, red and purple seeds from a single variegated maize plant ear were measured and the effects of temperature (15, 30 and 40°C) on germination behavior assessed. The antioxidant capacity of the seeds followed the order: purple [ red [ yellow [ white. The most favorable temperature for all of the seeds was 30°C. However, the highest germination rates (GRs) were observed in purple seeds, compared to the other colored seeds, when exposed to 40°C, and white seeds, when exposed to 30°C. The germination speeds among the seeds remained consistent (white [ yellow [ red [ purple), irrespective of temperature. The impaired germination observed at 40°C was significantly improved by adding exogenous antioxidants, but was further impaired by adding H 2 O 2 , especially for the white seeds; similar effects on GR were observed at 30°C and 15°C. High negative (at 30°C) and positive (at 40°C) correlations were observed between antioxidant capacity and GR. However, only high negative correlations were detected between antioxidant capacity and germination speed. In addition, no significant difference in heat stress tolerance was observed in the seedlings produced by the different colored seeds. Thus, we speculate that adverse conditions favor the germination of deeper colored seeds, whereas favorable conditions favor lighter colored ones. We discuss the significance of color, from the perspective of seed antioxidant capacity and germination ability under different environmental conditions.

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Section: Discussionmentioning

confidence: 97%

“…ROS play a key role in various events of a seed's life (Ogawa and Iwabuchi 2001;Bouteau et al 2007;Bouteau and Bailly 2008). In orthodox seeds, ROS are produced at all stages, from embryogenesis to germination (Bailly 2004).…”

Section: Introductionmentioning

confidence: 99%

The effects of temperature on the germination behavior of white, yellow, red and purple maize plant seeds

et al. 2015

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“…In sunflower (28) and apple (12) seeds, stimulation of seed germination by application of KCN was mediated by ROS. It has further been shown that the gene expression changes occurring upon treatment with either KCN or with the ROS-generating methyl viologen were very similar (6). We therefore hypothesized that the phytotoxicity of bacterial volatiles might be linked to oxidative stress.…”

Section: Vol 77 2011 Hcn and Phytotoxicity Of Bacterial Volatiles 1005mentioning

confidence: 99%

Volatile-Mediated Killing of Arabidopsis thaliana by Bacteria Is Mainly Due to Hydrogen Cyanide

Blom

Fabbri

Eberl

et al. 2011

Appl Environ Microbiol

143

108

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The volatile-mediated impact of bacteria on plant growth is well documented, and contrasting effects have been reported ranging from 6-fold plant promotion to plant killing. However, very little is known about the identity of the compounds responsible for these effects or the mechanisms involved in plant growth alteration. We hypothesized that hydrogen cyanide (HCN) is a major factor accounting for the observed volatile-mediated toxicity of some strains. Using a collection of environmental and clinical strains differing in cyanogenesis, as well as a defined HCN-negative mutant, we demonstrate that bacterial HCN accounts to a significant extent for the deleterious effects observed when growing Arabidopsis thaliana in the presence of certain bacterial volatiles. The environmental strain Pseudomonas aeruginosa PUPa3 was less cyanogenic and less plant growth inhibiting than the clinical strain P. aeruginosa PAO1. Quorumsensing deficient mutants of C. violaceum CV0, P. aeruginosa PAO1, and P. aeruginosa PUPa3 showed not only diminished HCN production but also strongly reduced volatile-mediated phytotoxicity. The double treatment of providing plants with reactive oxygen species scavenging compounds and overexpressing the alternative oxidase AOX1a led to a significant reduction of volatile-mediated toxicity. This indicates that oxidative stress is a key process in the physiological changes leading to plant death upon exposure to toxic bacterial volatiles.Bacteria interact with plants in many different ways. Over the past few years, the significance of volatile compounds as mediators of bacterium-plant interactions has become increasingly evident (14,18,33,46,50,54). Using compartmental petri dish assays with a bacterial culture on one side and Arabidopsis plants on the other, bacterial volatiles have been shown to either promote the growth of plants (14,36) or to reduce it (16,18,43,46). Despite the strong effects observed, very little is known at present about the identity of the compounds involved in this volatile-mediated impact of bacteria on plants. In addition to carbon dioxide (17), 2,3-butanediol and its precursor acetoin are, to our knowledge, the only organic volatiles which have been put forward as candidates to explain the beneficial effects of bacterial volatiles on plants (14,36). Likewise, the compounds responsible for the "killing" effect of some bacterial strains on Arabidopsis thaliana are yet to be discovered.In the course of a study to assess the volatile-mediated impact of a collection of rhizosphere bacterial isolates on the model plant A. thaliana, we observed contrasting effects, ranging from 6-fold growth promotion to plant killing. We noticed that the most virulent strains were known producers of hydrogen cyanide (e.g., Pseudomonas or Chromobacterium species). We therefore hypothesized that hydrogen cyanide (HCN), a potent inhibitor of cytochrome c oxidase and of other metalcontaining enzymes, might be responsible for the observed plant-killing effects.Few bacterial species are known to produc...

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“…New evidence suggests that ROS is not only a cytotoxic molecule, but also emerges as a key regulator in seed physiology where ROS mediates seed germination (Bailly 2004; El-Maarouf-Bouteau et al 2007; Bailly et al 2008; Ye et al 2012). An optimal range of ROS level is required for successful germination.…”

Section: Introductionmentioning

confidence: 99%

Arabidopsis ABI5 plays a role in regulating ROS homeostasis by activating CATALASE 1 transcription in seed germination

et al. 2017

Plant Mol Biol

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It has been known that ABA INSENSITIVE 5 (ABI5) plays a vital role in regulating seed germination. In the present study, we showed that inhibition of the catalase activity with 3-amino-1,2,4-triazole (3-AT) inhibits seed germination of Col-0, abi5 mutants and ABI5-overexpression transgenic lines. Compared with Col-0, the seeds of abi5 mutants showed more sensitive to 3-AT during seed germination, while the seeds of ABI5-overexpression transgenic lines showed more insensitive. H2O2 showed the same effect on seed germination of Col-0, abi5 mutants and ABI5-overexpression transgenic lines as 3-AT. These results suggest that ROS is involved in the seed germination mediated by ABI5. Further, we observed that T-DNA insertion mutants of the three catalase members in Arabidopsis displayed 3-AT-insensitive or -hypersensitive phenotypes during seed germination, suggesting that these catalase members regulate ROS homeostasis in a highly complex way. ABI5 affects reactive oxygen species (ROS) homeostasis by affecting CATALASE expression and catalase activity. Furthermore, we showed that ABI5 directly binds to the CAT1 promoter and activates CAT1 expression. Genetic evidence supports the idea that CAT1 functions downstream of ABI5 in ROS signaling during seed germination. RNA-sequencing analysis indicates that the transcription of the genes involved in ROS metabolic process or genes responsive to ROS stress is impaired in abi5-1 seeds. Additionally, expression changes in some genes correlative to seed germination were showed due to the change in ABI5 expression under 3-AT treatment. Together, all the findings suggest that ABI5 regulates seed germination at least partly by affecting ROS homeostasis.Electronic supplementary materialThe online version of this article (doi:10.1007/s11103-017-0603-y) contains supplementary material, which is available to authorized users.

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ROS Signaling in Seed Dormancy Alleviation

Cited by 28 publications

References 16 publications

The effects of temperature on the germination behavior of white, yellow, red and purple maize plant seeds

The effects of temperature on the germination behavior of white, yellow, red and purple maize plant seeds

Volatile-Mediated Killing of Arabidopsis thaliana by Bacteria Is Mainly Due to Hydrogen Cyanide

Arabidopsis ABI5 plays a role in regulating ROS homeostasis by activating CATALASE 1 transcription in seed germination

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