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# Editorial: Metallic micronutrient homeostasis in plants, volume II

Hannetz Roschztardtz, Diego Gomez-Casati, Christian Dubos, Julia Quintana

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Hannetz Roschztardtz, Diego Gomez-Casati, Christian Dubos, Julia Quintana. Editorial: Metallic micronutrient homeostasis in plants, volume II. Frontiers in Plant Science, 2023, 14, pp.1329190. 10.3389/fpls.2023.1329190. hal-04523580

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OPEN ACCESS

EDITED AND REVIEWED BY

M. J. I. Shohag,
University of Florida, United States

*CORRESPONDENCE

Hannetz Roschztardtz

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Hroschztardtz@bio.puc.cl

Diego Gomez-Casati

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diego.gomezcasati@gmail.com

Christian Dubos

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christian.dubos@inrae.fr

Julia Quintana

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julia.quintana@urjc.es

RECEIVED 28 October 2023

ACCEPTED 24 November 2023

PUBLISHED 01 December 2023

CITATION

Roschztardtz H, Gomez-Casati D,
Dubos C and Quintana J (2023)
Editorial: Metallic micronutrient
homeostasis in plants, volume II.
*Front. Plant Sci.* 14:1329190.
doi: 10.3389/fpls.2023.1329190

COPYRIGHT

© 2023 Roschztardtz, Gomez-Casati,
Dubos and Quintana. This is an open-access
article distributed under the terms of the
Creative Commons Attribution License
(CC BY). The use, distribution or
reproduction in other forums is permitted,
provided the original author(s) and the
copyright owner(s) are credited and that
the original publication in this journal is
cited, in accordance with accepted
academic practice. No use, distribution or
reproduction is permitted which does not
comply with these terms.

Editorial: Metallic micronutrient
homeostasis in plants, volume II

Hannetz Roschztardtz¹*, Diego Gomez-Casati²*,
Christian Dubos³* and Julia Quintana⁴,⁵*

¹Facultad de Ciencias Biológicas, Pontificia Universidad Católica de Chile, Santiago, Chile, ²Centro de Estudios Fotosintéticos y Bioquímicos (CEFOBI-CONICET), Universidad Nacional de Rosario, Rosario, Argentina, ³Institut des Sciences des Plantes de Montpellier (IPSiM), University Montpellier, CNRS, INRAE, Montpellier, France, ⁴Center for Plant Biotechnology and Genomics, Universidad Politécnica de Madrid, Madrid, Spain, ⁵Department of Biology and Geology, Physics and Inorganic Chemistry, Universidad Rey Juan Carlos, Madrid, Spain

KEYWORDS

plant nutrition, metal accumulation, transcriptomics, seed nutrient composition, metal
homeostasis, iron deficiency

Editorial on the Research Topic

Metallic micronutrient homeostasis in plants, volume II

"Metallic Micronutrient Homeostasis in Plants, Volume II" represents an initiative that responds to the need for a research area enriched with its unique historical context and challenges, all of which are critically relevant in the context of the ever-evolving global environmental landscape. The development and use of amenable techniques for metal localization *in vivo* remains a major experimental challenge in the study of metal nutrient homeostasis. Moreover, analysis of the interactions between micronutrient and macronutrient homeostasis is gaining more and more attention within the scientific community. Lastly, there is a pressing need to expand the knowledge in iron deficiency responses in non-model crops. This Research Topic agglutinates knowledge in these directions. In one of the contributions,

Grant-Grant et al. have elegantly demonstrated that alterations in the spatial
distribution of iron within plant embryos do not exert a significant influence on the
overall iron content within the seeds. This suggests that the regulation of iron levels within
plants is not determined by how iron is distributed within the embryo. From a
biotechnological perspective this discovery is interesting as it demonstrates the difficulty
in designing strategies to increase micronutrients in seeds.

Xu et al., have used different maize inbred lines in order to identify potential important genes in iron deficiency tolerance in maize, which affect a significant proportion of cultivable land on the planet. This study provides valuable insights into unravelling the molecular mechanisms that underlie maize's resilience to iron-deficiency stress.

In other work, Yuan et al. identified potential genes for maintaining iron homeostasis under iron-deficient stress in non-heading Chinese cabbage. This could provide a robust theoretical foundation for the research on molecular mechanisms governing the adaptation
to iron stress and could also serve to design new strategies for the
development of iron-tolerant crop varieties.

How plants respond to iron deficiency stress is an important
area of research in plant biology. Tran et al. demonstrated that the
alteration of porphyrin biosynthesis via the introduction of the
*Arabidopsis thaliana* Mg-chelatase H subunit gene (AtCHLH) into
transgenic rice effectively mitigates stress induced by iron
deficiency. It has been proposed the existence of an ABA-
independent pathway as a potential mechanism for alleviating
this stress through protoporphyrin synthesis.

In summary, the work presented in this Research Topic showed
the importance of different genes in the distribution and the
maintenance of iron homeostasis, specially under iron stress
conditions. Interestingly, is has been proposed that regulatory
mechanism for porphyrin metabolism would be part of the
complex protective systems against Fe deficiency stress. Moreover,
the landscape of iron deficiency transcriptomes has been enriched
with an interesting analysis of gene expression changes in Chinese
cabbage. All in all, this research aims to ultimately aid the
development of new solutions to mitigate fertilizer overuse and
while increasing crop nutritional value.

Author contributions

HR: Writing – original draft. DG-C: Writing – original draft.
CD: Writing – original draft. JQ: Writing – original draft.

Conflict of interest

The authors declare that the research was conducted in the
absence of any commercial or financial relationships that could be
construed as a potential conflict of interest.

Publisher's note

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