Effects of gamma rays irradiation on seed germination and growth of hard wheat

Melki, Mongi; Marouani, A.

doi:10.1007/s10311-009-0222-1

Cited by 73 publications

(49 citation statements)

References 10 publications

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“…The root length obtained from seeds irradiated with 150 Gy of gamma radiation was signiicantly increased by 63.2% from 1.8 cm in the control treatment (0 Gy) to 2.9 cm, which has been conirmed by Melki and Marouani [73].…”

supporting

confidence: 52%

Seed Dormancy

Yıldız¹,

Beyaz²,

Gürsoy³

et al. 2017

Advances in Seed Biology

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Dormancy is when there is a lack of germination in seeds or tubers even though the required conditions (temperature, humidity, oxygen, and light) are provided. Dormancy is based on hard seed coat impermeability or the lack of supply and activity of enzymes (internal dormancy) necessary for germination. Dormancy is an important factor limiting production in many ield crops. Several physical and chemical pretreatments are applied to the organic material (seeds/tubers) to overcome dormancy. Physical and physiological dormancy can be found together in some plants, and this makes it diicult to provide high-frequency, healthy seedling growth, since the formation of healthy seedlings from the organic material (seeds/tubers) sown is a prerequisite for plant production. This chapter will focus on the description of four diferent methods we have not seen reported elsewhere for overcoming dormancy.

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supporting

confidence: 52%

Seed Dormancy

Yıldız¹,

Beyaz²,

Gürsoy³

et al. 2017

Advances in Seed Biology

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“…These results were in compliance with the others researchers who reported that increasing the gamma ray doses were decreased the seed germination and seedling growth. Very low and low doses of gamma rays were reported cause a significant delay of germination process, decrease of survival precentage, and seedling height and root length in wheat [13], maize [16], tumeric [34], and soybean [35]. Gamma ray induced inhibition of growth through restraining cell cycle during somatic cell and damaging entire genome [36].…”

Section: Results and Discusionsmentioning

confidence: 99%

“…Several research on the stimulative effects when using gamma rays as induced mutagens were reported. Recently, low doses of gamma-rays of seed treatment resulted significant effects on germination, shoot, and root systems of wheat [13], physic nut [14], rice [15], maize [16], pigeon pea [17], chick pea [18], lathyrus [19], castor bean [20].However, the impact of gamma rays on soybean cv. Dering 1 is still unknown.…”

Section: Introductionmentioning

confidence: 99%

Mutagenic effects of gamma rays on soybean (Glycine max L.) germination and seedlings

Kusmiyati

Sutarno

Sas

et al. 2018

IOP Conf. Ser.: Earth Environ. Sci.

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Abstract. Narrow genetic diversity is a main problem restricting the progress of soybean breeding. One way to improve genetic diversity of plant is through mutation. The purpose of this study was to investigate effect of different dose of gamma rays as induced mutagen on physiological, morphological, and anatomical markers during seed germination and seedling growth of soybean. Seeds of soybean cultivars Dering-1 were irradiated with 11 doses of gamma rays (0, 5, 10, 20, 40, 80, 160, 320, 640, 1280, and 2560 Gy [Gray]. The research design was arranged in a completely randomized block design in three replicates. Results showed that soybean seed exposed at high doses (640, 1280, and 2560 Gy) did not survive more than 20 days, the doses were then removed from anatomical evaluation. Higher doses of gamma rays siginificantly reduced germination percentage at the first count and final count, coefficient of germination velocity, germination rate index, germination index, seedling height and seedling root length, and significantly increased mean germination time, first day of germination, last day of germination, and time spread of germination. However, the effects of gamma rays were varies for density, width, and length of stomata. The LD 50 obtained based on survival percentage was 314.78 Gy. It can be concluded that very low and low doses of gamma rays (5-320 Gy) might be used to study the improvement of soybean diversity.

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“…Seeds with root lengths of over two mm were considered as germinated (Melki 2010). Germination Capacity percentage (GC%) was calculated according to the following equation (Melki 2008): GC (%) = " Number of germinated seeds after 8 days" /"Total number of seeds" ×100 All tests were repeated three times, and the results of root length stem length, germination capacity, germination speed, fresh weight, dry weight and the chlorophyll content were statistically analyzed by ANOVA test using SPSS software.…”

Section: Methodsmentioning

confidence: 99%

Introducing the “NewMed Effect”:A New Phenomenon which Mimic Radiation Induced Bystander Effect and Amplifies the Biopositive Effects of Very Low Doses of Gamma Radiation

Nosrati¹,

Mortazavi²,

Nejadsattari³

et al. 2016

Biosci., Biotech. Res. Asia

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In this paper we present our findings regarding a phenomenon which mimic bystander effect and significantly amplifies the stimulatory effects of low dose radiation. Thirty Triticum aestivum grains served as the "control group" while in the 2nd group 30 grains were exposed to gamma radiation emitted by Tc-99m. In the 3rd group, irradiated seeds were transferred to a new culture medium. The seeds in the 4th group were discarded after irradiation andt new un-irradiated cells were transferred to the irradiated medium. Exposure of Triticum aestivum to very low levels of ionizing radiation in the range of a few mSv enhanced root length, stem length, germination capacity, germination speed, fresh weight and the chlorophyll content. It was interestingly discovered that transferring irradiated seeds to a new medium, enhances root length, stem length, dry weight and the chlorophyll content. To the best of our knowledge this is the first report on the phenomenon we called it "NewMed effect". As far as we know, this is the 1st report on the stimulatory bio effects of exposure to very low doses of gamma radiation in Triticum aestivum. Further studies are needed to shed light on different aspects as well as potential applications of this effect.

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Effects of gamma rays irradiation on seed germination and growth of hard wheat

Cited by 73 publications

References 10 publications

Seed Dormancy

Seed Dormancy

Mutagenic effects of gamma rays on soybean (Glycine max L.) germination and seedlings

Introducing the “NewMed Effect”:A New Phenomenon which Mimic Radiation Induced Bystander Effect and Amplifies the Biopositive Effects of Very Low Doses of Gamma Radiation

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