Germination of salt-stressed seeds as related to the ethylene biosynthesis ability in three Stylosanthes species

Silva, Priscila O.; Medina, Eduardo F.; Barros, Raimundo Santos; Ribeiro, Dimas M.

doi:10.1016/j.jplph.2013.09.004

Cited by 38 publications

(28 citation statements)

References 41 publications

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“…These results could be explained by the effect of ET in overcoming the inhibitory effect of ABA in seed germination (Kucera et al, 2005). Similarly, alleviation of the detrimental effects of salinity on seed germination by ET has been shown in numerous species (Mohammed, 2007 Recently, Silva et al (2014) developed interesting experiments to analyse the role of endogenous ET in seed germination. This study confirmed that JERF3 expression in tobacco plants enhanced adaptation to osmotic stress, which suggests a possible role of ET in germination under drought stress.…”

Section: Ethylene (Et)mentioning

confidence: 94%

Drought and salinity alter endogenous hormonal profiles at the seed germination phase

et al. 2015

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The most critical phase in plant life is seed germination, which is influenced by environmental factors. Drought and salinity are key environmental factors that affect seed germination. Reduction or alterations of germination when seeds are exposed to these factors have been shown to be due to either the adverse effects of water limitation and/or specific ion toxicity on metabolism. Phytohormones are chemical messengers produced within the plant that control its growth and development in response to environmental cues; small fluctuations of phytohormone levels alter the cellular dynamics and, hence, play a central role in regulating plant growth responses to these environmental factors. To integrate current knowledge, the present review focuses on the involvement of endogenous phytohormones in plant adaptative responses to drought and salinity at one of the plant's developmental phases.

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Section: Ethylene (Et)mentioning

confidence: 94%

Drought and salinity alter endogenous hormonal profiles at the seed germination phase

et al. 2015

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“…Salinity stress inhibits the growth of plants at early seedling and developed seedling stages (Ferdose et al, 2009;Silva et al, 2014). In this study, the impact of saline irrigation water on germination and early growth stages were studied.…”

Section: Discussionmentioning

confidence: 99%

“…Salinity tolerance is a complex trait that can be improved through integration between molecular geneticists and physiologists . Enormous amount of researches have explored the molecular and physiological mechanism of salinity stress, however, we are still far from understanding the key traits that confer such tolerance (Bartels and Sunkar, 2005;Silva et al, 2014).…”

Section: Introductionmentioning

confidence: 99%

Effect of saline water on germination and early growth stage of five Apiaceae species

Solima¹,

El-Shaieny²

2014

Afr. J. Agric. Res.

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Improving crop tolerance to salinity stress is a major challenge in many regions of the world towards sustaining the global food security. In this study, an interspecific difference in salinity tolerance was examined among five Apiaceae species: Caraway, celery, dill, fennel and parsley. Saline water was used at concentrations of 0, 1000, 2000 and 3000 ppm for 15 days from seed sowing (germination experiment) or for 30 days after one month of germination (early growth stage experiment). Germination rate, seedling length and leaf water content were decreased significantly with increase in salinity levels. These were associated with significant increases in Na + content and significant decreases in K + /Na + ratio. Ion leakage showed no significant changes. Germination rate and seedling length are associated greatly with relative water content and less Na + content. These results suggest that inhibition in germination and early growth stage are associated mainly with osmotic stress than ion toxicity. Mostly, proline content increased significantly under salinity stress conditions. There were significant differences among species in response to salinity stress and Celery species was the most sensitive species to salinity stress compared to others.

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“…The atmosphere of the flask was mixed occasionally with a long needle syringe. Following an 18-h incubation, a sample of 1 mL was taken from the flask headspace with a syringe and the ethylene concentration was measured by gas chromatography as described by Silva et al (2014).…”

Section: Determination Of Ethylene Levelsmentioning

confidence: 99%

Physiological and biochemical responses of Eucalyptus seedlings to hypoxia

Medina

Mayrink

Dias

et al. 2019

Annals of Forest Science

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& Key message Hypoxia promoted distinct changes in the levels of hormones, amino acids and organic acids in the roots and shoots of a seedling from 2 Eucalyptus clones. These results indicate that modulation of hormone production, as well as specific chemical constituents associated with primary metabolism, contributes to the regulation of growth of Eucalyptus seedlings under hypoxic conditions. & Context Although floods in areas under Eucalyptus cultivation in Brazil negatively affect plant growth, chemical markers and/ or indicators of hypoxia contributes to the regulation.s & Aims This study aimed to evaluate the hormonal and metabolic alterations induced by hypoxia on seedling growth. & Methods Seedlings of Eucalyptus urograndis clones VCC 975 and 1004 were grown in liquid solution and submitted to bubbling with air or with nitrogen. Levels of indol-3-acetic acid (IAA), abscisic acid (ABA), ethylene, 1-aminocyclopropane-1-carboxylic acid (ACC), primary metabolite profile and photosynthetic parameters were evaluated after fourteen days. & Results Hypoxia did not affect shoot dry mass of the seedlings. However, it decreased stomatal conductance and photosynthetic CO 2 assimilation rate, and increased levels of ABA in the shoot. Hypoxia greatly reduced the dry mass and volume of roots, concomitantly with higher ACC and ethylene production. Moreover, hypoxia promoted distinct changes in IAA levels, and in amino acid and organic acid metabolism in roots and shoots. & Conclusion The biosynthesis of ABA, ethylene and IAA and its quantity in root tissues indicates the regulation of metabolism in response to hypoxia in Eucalyptus clones. Handling Editor: Erwin DreyerContribution of the co-authors: EFM designed, executed the study, and was the main contributor to the writing of the manuscript. Gustavo CV MAYRINK and Cleide R DIAS contributed to maintaining and completing the experiment. Camilo E VITAL performed the LC-MS analysis. Dimas M RIBEIRO, Ivo R SILVA, and Andrew MERCHANT assisted in the design of the experiment, analysis of the results and composition of the paper.Electronic supplementary material The online version of this article (https://doi.

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Germination of salt-stressed seeds as related to the ethylene biosynthesis ability in three Stylosanthes species

Cited by 38 publications

References 41 publications

Drought and salinity alter endogenous hormonal profiles at the seed germination phase

Drought and salinity alter endogenous hormonal profiles at the seed germination phase

Effect of saline water on germination and early growth stage of five Apiaceae species

Physiological and biochemical responses of Eucalyptus seedlings to hypoxia

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