Current Importance and Potential Use of Low Doses of Gamma Radiation in Forest Species

Iglesias-Andreu, Lourdes Georgina; Octavio‐Aguilar, Pablo; Bello-Bello, Jericó Jabín

doi:10.5772/36950

Cited by 11 publications

(6 citation statements)

References 69 publications

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“…In this study a dosage of 2 Gy induced the highest value of the following germination indexes: (GP (%) = 86.67; GI = 2.02; SE = 7.7; and CRG = 7.24), and at 6 Gy there was observed a decrease of values of the same parameters (Table 1). The similar behaviour was reported by Iglesias-Andreu et al (2012) in Abies religiosa, the germination percentage grew with the growing frequency of mutation until 10 Gy and then lowered gradually with growth of γ rays dosage. Habba (1992) for seeds of Hyoscyamus muticus observed that the germination percentage grew gradually until 100 Gy.…”

supporting

confidence: 85%

“…The sessile oak acorns appear to be well stored over the full range of these temperatures, from -2 °C to 4 °C (Gordon, 1992b). Gamma irradiation (γ rays) is one of the most frequent practices of genetic variation induction at many species of plants (De Micco et al, 2011;Moussa, 2006) including trees (Iglesias-Andreu et al, 2012) and morphological parts of plants. It has a considerable influence on growth and development of plantlets through genetical, cytological, biochemical, physiological inductions (Kiong et al, 2008) and morphogenetical modifications in cells and tissues closely related to irradiation levels (Ikram et al, 2010).…”

Section: Introduction Introduction Introduction Introductionmentioning

confidence: 99%

“…Despite the utility of γ rays to improve the germinative potential there are not many references in literature regarding the benefits of gamma radiation on tree species (Iglesias-Andreu et al, 2012). Most studies on seeds germination in forestry species were performed with classic methods, using physical/chemical preseeding treatments.…”

Section: Introduction Introduction Introduction Introductionmentioning

confidence: 99%

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Non-chemical treatments to improve the seeds germination and plantlets growth of sessile oak

Holonec

Viman²,

Morar³

et al. 2021

Not Bot Horti Agrobo

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The current study aimed to investigate the effect of different treatments applied to sessile oak seeds in order to improve the germination features, development and growth of seedlings. The seeds were subjected to electric field, electromagnetic field and γ rays’ treatments. For the electric field study three distinct voltages (10V, 30V and 50V) and three values of exposure time (15 min., 35 min. and 60 min.) were considered. Displaying the seeds in an electric field for 60 minutes increased the germination rate with 58.89%. The highest value for the seedling’s height was obtained when seeds were exposed for 15 minutes at an intensity of 30V. The interaction between the intensity and the timing showed that treating seeds with 30V for 35 minutes improved significantly the seedlings peculiarities. In regard to the electromagnetic field, the seeds were subjected to a single value of electromagnetic field (B=0,4mT; i=0,680 A) and three values of exposure time: 10 min., 20 min. and 30 min. The sessile oak seeds subjected to the electromagnetic field for 20 minutes induced the highest value of germination percentage (90.00%) and germination index (1.81) and those seeds produced plantlets with high diameter (2.69 mm) and with significant differences towards non-treated plants. For γ rays treatments a dosage of 2 Gy induced the highest value of germination percentage (86.67%), of germination index (2.02); of germination energy (7.7); and of germination speed (7.24). A dosage of 6 Gy decreased the values of the same parameters. Our results showed that a dosage of 2 Gy improved also the growth parameters such as plantlets diameter (2.65 mm) and height (11.25 cm). In short, the physical treatments represent an ecological substitute approach towards the chemical substances presently used to improve seeds germination. Using physical treatments for seeds germination and growth of seedlings might be a harmless alternative for environment.

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supporting

confidence: 85%

Section: Introduction Introduction Introduction Introductionmentioning

confidence: 99%

Section: Introduction Introduction Introduction Introductionmentioning

confidence: 99%

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Non-chemical treatments to improve the seeds germination and plantlets growth of sessile oak

Holonec

Viman²,

Morar³

et al. 2021

Not Bot Horti Agrobo

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“…However, its use should be preceded by assays that determine the effect that irradiations have on the plant material. A radio stimulant low-dose is defined as any dose from environmental radiation level and the threshold that marks the boundary between positive and negative biological effect" [20]. "The effects of gamma radiation are investigated by studying plant germination, growth and development, and biochemical characteristics of maize.…”

Section: Discussionmentioning

confidence: 99%

Effect of Different Doses of Irradiation on the Germination of Varieties of Maize Developing against the Fall Armyworm in the Central African Republic

Reo-Ndouba,

Aba-Toumnou,

Allah-Barem

et al. 2023

AJRCS

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Maize is a major crop feeding 80% of the population of the Central African Republic (CAF). However, the country is not yet self-sufficient in its maize need and continues to rely partially on imports. Exacerbating this situation is the recent invasive spread of the fall armyworm attributed to change in weather patterns since 2016 which has been decimating the crop leading to drastic yield losses. Various control measures continue to be tested globally for the control of FAW, including chemical control, biological control using microbial organisms and predatory insects that attack FAW, use of genetically modified crops with Bt genes, and integrated pest management. However, the use of developing genetic resistance in maize against the pest remains under-explored. We focused research on initiating a mutation breeding effort in maize in CAF. The goal of this experience is to determinate the optimal dose from radio-sensitivity test of CMS8704 (100 Gy, 200 Gy, 300 Gy, 400 Gy and 500 Gy), CMS 2019 (100 Gy, 200 Gy, 300 Gy, 400 Gy and 500 Gy), CMS 8501 (100 Gy, 200 Gy, 300 Gy, 400 Gy and 500 Gy) and local ecotypes (100 Gy, 200 Gy, 300 Gy, 400 Gy and 500 Gy). 200 seeds are bulk to irradiation with different doses (100 Gy, 200 Gy, 300 Gy, 400 Gy and 500 Gy). The test of germination is carried out on 200 seeds four varieties. The treated seeds are sown at equal depths in a tray filled with soil/compost or can as well sow in natural condition on the field just to assure that the soil surface is flat, and the treated seeds are sown at equal depth containing the five treatments in rows of 200s seed each for one control and each treatment. Per assay three replicates are performed, one tray per replicate. Fourteen days after sowing, the seedling height and survival is measured to determine the Growth Reduction Value 50 or GR50. All seeds from different doses (CMS-20 19, CMS87 04 and the Local ecotype) were germinated from different doses (100Gy, 200Gy and 300Gy) and did be presented the symptom of FAW. However, for the CMS85 01, all seeds from different doses (100Gy, 200Gy, 300Gy; 400Gy and 500Gy) were germinated as the control, but the major of plants are attacked by the FAW (Fall Armyworm).

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“…The presence of a cell wall in plants and the totipotency of cells that provide regeneration capability, as well as the presence of a more effective repair system for cellular damage due to the inability of plants to move, result in increased resistance to ionizing radiation (Fornalski et al, 2012). Gamma doses lower than 1 kGy are considered low doses (Iglesias-Andreu et al, 2012), and low-dose gamma application has shown that germination rate and seedling growth in cucumber and okra (Jaipo et al, 2019), germination, fruit number and total yield in tomato (Wiendl et al, 2013), germination index, root and hypocotyl length and photosynthetic pigment content in lettuce (Marcu et al, 2013) are positively affected. Wang et al (2017) stated that low-dose gamma can affect the expression of genes related to heavy metal transport and abscisic acid metabolism under Pb/Cd stress in barley.…”

Section: Introductionmentioning

confidence: 99%

Hormetic effect of gamma irradiation under salt stress condition in Phaseolus vulgaris

Ulukapı

2021

Chil. j. agric. res.

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Common bean (Phaseolus vulgaris L.) is widely grown around the world and sensitive to stress conditions. Accumulation and degradation of amino acids are informative indicators of plant tolerance. In this study, the vegetative growth and amino acid profiles of two common bean cultivars (Öz Ayşe and F16) under salt stress (50, 100, 150, 200 mM NaCl) were investigated to determine the hormetic effect of low-dose gamma rays (10, 20, 30, 40 Gy 60 Co). The irradiated mature embryos of seeds were regenerated in vitro using embryo cultures. The effects of gamma rays on vegetative growth and amino acid profile under stress and non-stress conditions differed. In terms of vegetative growth, 10 Gy for 'Öz Ayşe' and 20 Gy for 'F16' had hormetic effects and stimulated plant growth under non-stress conditions. Under salt stress conditions, the effect of gamma rays varied according to the severity of the stress. 30 Gy for 'Öz Ayşe' and 'F16' at 100 mM salt stress had hormetic effects on vegetative growth. The combined effects of salt stress and gamma rays on the amino acid profile are supported by the vegetative growth results of the plants. Amino acid accumulation occurred at 100 mM at 30 Gy for 'Öz Ayşe' and 'F16'. The most accumulated amino acids were glutamic acid (127.63 mg kg -1 ), alanine (173.07 mg kg -1 ), glutamine (188.96 mg kg -1 ), proline (124.50 mg kg -1 ), tyrosine (29.23 mg kg -1 ) in 'Öz Ayşe' and tyrosine (29.88 mg kg -1 ) in 'F16' under stress. This study shows that low-dose gamma application under moderate stress conditions has a hormetic effect, not under severe salt stress.

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Current Importance and Potential Use of Low Doses of Gamma Radiation in Forest Species

Cited by 11 publications

References 69 publications

Non-chemical treatments to improve the seeds germination and plantlets growth of sessile oak

Non-chemical treatments to improve the seeds germination and plantlets growth of sessile oak

Effect of Different Doses of Irradiation on the Germination of Varieties of Maize Developing against the Fall Armyworm in the Central African Republic

Hormetic effect of gamma irradiation under salt stress condition in Phaseolus vulgaris

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