Elucidating hormonal/ROS networks during seed germination: insights and perspectives

Díaz‐Vivancos, Pedro; Barba‐Espín, Gregorio; Hernández, José Antonio

doi:10.1007/s00299-013-1473-7

Cited by 106 publications

(77 citation statements)

References 98 publications

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“…Interaction between phytohormones and H 2 O 2 can be antagonistic or synergistic. Signaling processes trigger interactions are not developed only between particular phytohormones but also between phytohormones and other signaling molecules such as NO [148], H 2 S [149], ·OH [150] and H 2 O 2 [151], which is believed to play a central role in signaling processes during plant development and stress responses [152]. GA treatment enhanced ROS production namely superoxide and H 2 O 2 in radish plants [153] and Arabidopsis [154].…”

Section: Priming Strategy To Improve Seed Germination Under Stressfulmentioning

confidence: 99%

Metabolic Processes During Seed Germination

Ali¹,

Elozeiri²

2017

Advances in Seed Biology

129

102

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Seed germination is crucial stage in plant development and can be considered as a determinant for plant productivity. Physiological and biochemical changes followed by morphological changes during germination are strongly related to seedling survival rate and vegetative growth which consequently affect yield and quality. This study is aimed to focus on proceeding of the most vital metabolic processes namely reserve mobilization, phytohormonal regulation, glyoxylate cycle and respiration process under either stressful or non-stressful conditions that may be led to suggest and conduct the more successful experimental improvements. Seed imbibition triggered the activation of various metabolic processes such as synthesis of hydrolytic enzymes which resulted in hydrolysis of reserve food into simple available form for embryo uptake. Abiotic stresses potentially affect seed germination and seedling establishment through various factors, such as a reduction in water availability, changes in the mobilization of stored reserves, hormonal balance alteration and affecting the structural organization of proteins. Recent strategies for improving seed quality involved classical genetic, molecular biology and invigoration treatments known as priming treatments. H 2 O 2 accumulation and associated oxidative damages together with a decline in antioxidant mechanisms can be regarded as a source of stress that may suppress germination. Seed priming was aimed primarily to control seed hydration by lowering external water potential, or shortening the hydration period.

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Section: Priming Strategy To Improve Seed Germination Under Stressfulmentioning

confidence: 99%

Metabolic Processes During Seed Germination

Ali¹,

Elozeiri²

2017

Advances in Seed Biology

129

102

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“…; Díaz‐Vivancos et al . ). Ethylene has been shown to promote germination, being more important during its later phases, and counteracts the effects of ABA (Matilla & Matilla‐Vázquez ).…”

Section: Introductionmentioning

confidence: 97%

“…Germination is not only a consequence of complex hormonal interactions, but also involves changes in cell structure and activation of mechanisms to reduce lipid peroxidation and oxidative stress (Díaz‐Vivancos et al . ). Tocopherol and tocotrienol, which are vitamin E compounds, are present in palm seeds (Siles et al .…”

Section: Introductionmentioning

confidence: 97%

Control of macaw palm seed germination by the gibberellin/abscisic acid balance

et al. 2015

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The hormonal mechanisms involved in palm seed germination are not fully understood. To better understand how germination is regulated in Arecaceae, we used macaw palm (Acrocomia aculeata (Jacq.) Lodd. Ex Mart.) seed as a model. Endogenous hormone concentrations, tocopherol and tocotrienol and lipid peroxidation during germination were studied separately in the embryo and endosperm. Evaluations were performed in dry (D), imbibed (I), germinated (G) and non-germinated (NG) seeds treated (+GA3 ) or not treated (control) with gibberellins (GA). With GA3 treatment, seeds germinated faster and to a higher percentage than control seeds. The +GA3 treatment increased total bioactive GA in the embryo during germination relative to the control. Abscisic acid (ABA) concentrations decreased gradually from D to G in both tissues. Embryos of G seeds had a lower ABA content than NG seeds in both treatments. The GA/ABA ratio in the embryo was significantly higher in G than NG seeds. The +GA3 treatment did not significantly affect the GA/ABA ratio in either treatment. Cytokinin content increased from dry to germinated seeds. Jasmonic acid (JA) increased and 1-aminocyclopropane-1-carboylic acid (ACC) decreased after imbibition. In addition, α-tocopherol and α-tocotrienol decreased, while lipid peroxidation increased in the embryo during germination. We conclude that germination in macaw palm seed involves reductions in ABA content and, consequently, increased GA/ABA in the embryo. Furthermore, the imbibition process generates oxidative stress (as observed by changes in vitamin E and MDA).

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“…However, the over-accumulation of H 2 O 2 easily caused cell injury (Mittler et al, 2004; Bailly et al, 2008; Kumar et al, 2015). H 2 O 2 signal directly or indirectly involved in many signaling pathways of SA, GA, ABA, and so on (Durner and Klessig, 1999; Diaz-Vivancos et al, 2013; Maarouf et al, 2015; Qi et al, 2015). Antioxidant enzymes produced in plants such as superoxide dismutase (SOD), catalase (CAT), ascorbate peroxidase (APX), and glutathione reductase (GR) contributed to the endogenous H 2 O 2 balance (Noctor and Foyer, 1998; Slesak et al, 2007).…”

Section: Introductionmentioning

confidence: 99%

The Synergistic Priming Effect of Exogenous Salicylic Acid and H2O2 on Chilling Tolerance Enhancement during Maize (Zea mays L.) Seed Germination

Zhan¹,

Xu²,

Gao³

et al. 2017

Front. Plant Sci.

107

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Chilling stress is an important constraint for maize seedling establishment in the field. To examine the role of salicylic acid (SA) and hydrogen peroxide (H2O2) in response to chilling stress, we investigated the effects of seed priming with SA, H2O2, and SA+H2O2 combination on maize resistance under chilling stress (13°C). Priming with SA, H2O2, and especially SA+H2O2 shortened seed germination time and enhanced seed vigor and seedling growth as compared with hydropriming and non-priming treatments under low temperature. Meanwhile, SA+H2O2 priming notably increased the endogenous H2O2 and SA content, antioxidant enzymes activities and their corresponding genes ZmPAL, ZmSOD4, ZmAPX2, ZmCAT2, and ZmGR expression levels. The α-amylase activity was enhanced to mobilize starch to supply metabolites such as soluble sugar and energy for seed germination under chilling stress. In addition, the SA+H2O2 combination positively up-regulated expressions of gibberellic acid (GA) biosynthesis genes ZmGA20ox1 and ZmGA3ox2, and down-regulated GA catabolism gene ZmGA2ox1 expression; while it promoted GA signaling transduction genes expressions of ZmGID1 and ZmGID2 and decreased the level of seed germination inhibitor gene ZmRGL2. The abscisic acid (ABA) catabolism gene ZmCYP707A2 and the expressions of ZmCPK11 and ZmSnRK2.1 encoding response receptors in ABA signaling pathway were all up-regulated. These results strongly suggested that priming with SA and H2O2 synergistically promoted hormones metabolism and signal transduction, and enhanced energy supply and antioxidant enzymes activities under chilling stress, which were closely relevant with chilling injury alleviation and chilling-tolerance improvement in maize seed.Highlights:Seed germination and seedling growth were significantly improved under chilling stress by priming with SA+H2O2 combination, which was closely relevant with the change of reactive oxygen species, metabolites and energy supply, hormones metabolism and regulation.

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Elucidating hormonal/ROS networks during seed germination: insights and perspectives

Cited by 106 publications

References 98 publications

Metabolic Processes During Seed Germination

Metabolic Processes During Seed Germination

Control of macaw palm seed germination by the gibberellin/abscisic acid balance

The Synergistic Priming Effect of Exogenous Salicylic Acid and H2O2 on Chilling Tolerance Enhancement during Maize (Zea mays L.) Seed Germination

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