Influence of Gamma Rays on Cell Division in the Seed Roots of Irradiated Dry Seeds of &lt;i&gt;Vince rosea&lt;/i&gt; L

Sudhakaran, I. V.

doi:10.1508/cytologia.37.445

Cited by 7 publications

(2 citation statements)

References 21 publications

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“…In our case, the results showed a significant decrease in root tip length. According to Sudhakaran [36], this phenomenon can be caused by a reduction of the mitotic index of the root tip cells of seedlings treated with high doses of gamma radiation. In addition, we observed necrosis in cortical cells of the primary root and subsequent development and death of lateral roots (Figure 1).…”

Section: Discussionmentioning

confidence: 99%

Gamma Irradiation of Plukenetia volubilis L. Seeds Promotes Several Changes during Its Germination and Vegetative Growth

Corazon-Guivin,

Rengifo-Del Aguila,

Hernández-Amasifuen

et al. 2023

Advances in Agriculture

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Plukenetia volubilis (“sacha inchi”) is a perennial plant that produces edible seeds with a remarkable lipid composition that is highly concentrated in polyunsaturated essential fatty acids. Inca nut seeds have potential use for lowering malnutrition, enhancing sustainable food production systems, reforestation, and the pharmaceutical industry. The establishment of genetic variability, through spontaneous mutations or induced mutations, can bring desirable and undesirable agronomic traits. Our research focused on studying the impact of gamma radiation on P. volubilis seeds during their germination and vegetative growth. For this purpose, we exposed seeds to different doses of gamma irradiation (0, 500, 550, 600, 650, 700, 750, 800, and 900 Gy) and planted them under in vitro and greenhouse conditions following a completely random design. Our findings showed that gamma radiation treatments did not affect the germination of P. volubilis seeds but affected its root tip growth. An analysis on morphological and physiological parameters revealed a reduction in seedling size and weight when the irradiation doses were increased. Also, the pattern of plant organ development changed as its gamma irradiation was increased. Finally, our analysis found that median lethal dose (LD50) for P. volubilis L. seeds is 618.78 Gy. Our findings can be used as an important reference for plant breeding in this species.

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Section: Discussionmentioning

confidence: 99%

Gamma Irradiation of Plukenetia volubilis L. Seeds Promotes Several Changes during Its Germination and Vegetative Growth

Corazon-Guivin,

Rengifo-Del Aguila,

Hernández-Amasifuen

et al. 2023

Advances in Agriculture

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“…Sometimes, chromatin stickiness impairs chromosome segregation and leads to the formation of pycnotic nuclei and chromatin degeneration (de Souza and Pagliarini 1997). The phenomenon of stickiness and clumping of chromosomes has been attributed to environmental factors (Sudhakaran 1972), genetic factors (Beadle 1932), low temperature (Eriksson 1968) or partial dissociation of nucleoprotein (Kaufman 1956). Various authors associated the chromatin stickiness with the phenomenon of cytomixis and other meiotic irregularities (Rani et al 2014).…”

Section: Chromatin Stickinessmentioning

confidence: 99%

Morphometric and Cytological Analysis of Different Cytotypes of <i>Dioscorea deltoidea</i> Wall., 1850 (Dioscoreaceae) from North-Western Indian Himalayas

2016

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Summary Dioscorea deltoidea Wall. (Dioscoreaceae), commonly called Nepal Yam, is distributed in the Himalayas, from Kashmir to Assam at altitudes of 450-3100 m. It is an important medicinal plant commercially exploited for the extraction of diosgenin, a pioneer for steroid drugs. This valuable species of the Indian Himalayas faces a serious threat of extinction due to over-exploitation of its tubers and gradual shrinkage of its natural habitat. The species shows considerable intraspecific morphological and cytological variations involving polyploidy and hybridization. In the present study, we examined the meiotic course, microsporogenesis, pollen fertility, and morphological characters of 12 populations of diploid (2x) and four populations of tetraploid (4x) cytotypes of Dioscorea deltoidea. The majority of populations exhibit normal course of meiosis with 100% pollen fertility. However, in six populations (four diploid cytotypes and two tetraploid cytotypes), the individuals show inter-PMC transfer of chromatin material at various stages of meiosis and associated meiotic irregularities such as chromosome stickiness, unoriented bivalents, laggards, micronuclei, and chromatin bridges at different stages of meiosis. Consequently, these populations exhibited varying degree of pollen sterility and heterogenoussized pollen grains. Analysis of various morphological characteristics of diploid and tetraploid cytotypes revealed that increase in ploidy level in the species is correlated with gigantism of some vegetative characteristics.

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Radiosensitivity

Datta

2023

Induced Mutation Breeding

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Influence of Gamma Rays on Cell Division in the Seed Roots of Irradiated Dry Seeds of <i>Vince rosea</i> L

Cited by 7 publications

References 21 publications

Gamma Irradiation of Plukenetia volubilis L. Seeds Promotes Several Changes during Its Germination and Vegetative Growth

Gamma Irradiation of Plukenetia volubilis L. Seeds Promotes Several Changes during Its Germination and Vegetative Growth

Morphometric and Cytological Analysis of Different Cytotypes of <i>Dioscorea deltoidea</i> Wall., 1850 (Dioscoreaceae) from North-Western Indian Himalayas

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