Gene Expression and Nucleolar Dominance in Hexaploid Triticale and T. Aestivum

Georgiev, S.

doi:10.1080/13102818.2008.10817534

Cited by 1 publication

(2 citation statements)

References 30 publications

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“…Concerning the nucleolar activity analysis, in all treatments, the maximum number of nucleoli seen per nucleus was four, as expected for hexaploid triticale, given the epigenetic phenomenon of nucleolar dominance where the rRNA genes of rye are silenced by cytosine methylation [27][28][29][30][31]. Only the rRNA genes on the wheat-origin chromosome pair 1B and 6B can organise nucleoli [28].…”

Section: Discussionsupporting

confidence: 52%

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Combination of Iron and Zinc Enhanced the Root Cell Division, Mitotic Regularity and Nucleolar Activity of Hexaploid Triticale

Carvalho,

Lino,

Alves

et al. 2023

Plants

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Hexaploid triticale results from crosses between durum wheat and rye. Despite its high agronomic potential, triticale is mainly used for livestock feed. Triticale surpasses their parental species in adaptability and tolerance to abiotic and biotic stresses, being able to grow in acidic soils where a high amount of iron (Fe) and zinc (Zn) is typical. On the other hand, high amounts of these essential trace elements can be cytotoxic to bread wheat. The cytotoxicity induced by seed priming with a high concentration of Fe and Zn impaired root cell division and induced nucleolar changes in bread wheat. Such cytogenetic approaches were expedited and successfully determined cytotoxic and suited micronutrient dosages for wheat nutripriming. With this study, we intended to analyse the hexaploid triticale cv ‘Douro’ root mitotic cell cycle and nucleolar activity after seed priming performed with aqueous solutions of iron (Fe) and/or zinc (Zn), containing a concentration that was previously considered cytotoxic, to bread wheat and to infer the higher tolerance of triticale to these treatments. The overall cytogenetic data allowed us to conclude that the Fe + Zn treatment enhanced the root mitotic index (MI), mitosis regularity and nucleolar activity of ‘Douro’ relative to the control and the individual treatments performed with Fe or Zn alone. The Fe + Zn treatment might suit triticale biofortification through seed priming.

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Section: Discussionsupporting

confidence: 52%

“…The nucleolar size has been positively correlated with cell proliferation, rRNA transcription and transport or protein synthesis [31][32][33][34]. However, the nucleolar number and area changes in response to particular abiotic stress do not always follow the same trend among plant species [11,18,19,21,25,35].…”

Section: Discussionmentioning

confidence: 99%