Cited by 152Plant tissue culture and regenerationPlant Stress Responses and TolerancePlant nutrient uptake and metabolism

Stress-induced accumulation of DcAOX1 and DcAOX2a transcripts coincides with critical time point for structural biomass prediction in carrot primary cultures (Daucus carota L.).

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Campos, M. Doroteia, Nogales, Amaia, Cardoso, Hélia G., Kumar, Sarma R., Nobre, Tânia, Sathishkumar, Ramalingam, Arnholdt-Schmitt, Birgit·2016·Frontiers in Genetics

Abstract

Stress-adaptive cell plasticity in target tissues and cells for plant biomass growth is important for yield stability. In vitro systems with reproducible cell plasticity can help to identify relevant metabolic and molecular events during early cell reprogramming. In carrot, regulation of the central root meristem is a critical target for yield-determining secondary growth. Calorespirometry, a tool previously identified as promising for predictive growth phenotyping has been applied to measure the respiration rate in carrot meristem. In a carrot primary culture system (PCS), this tool allowed identifying an early peak related with structural biomass formation during lag phase of growth, around the 4th day of culture. In the present study, we report a dynamic and correlated expression of carrot AOX genes (DcAOX1 and DcAOX2a) during PCS lag phase and during exponential growth. Both genes showed an increase in transcript levels until 36 h after explant inoculation, and a subsequent down-regulation, before the initiation of exponential growth. In PCS growing at two different temperatures (21°C and 28°C), DcAOX1 was also found to be more expressed in the highest temperature. DcAOX genes' were further explored in a plant pot experiment in response to chilling, which confirmed the early AOX transcript increase prior to the induction of a specific anti-freezing gene. Our findings point to DcAOX1 and DcAOX2a as being reasonable candidates for functional marker development related to early cell reprogramming. While the genomic sequence of DcAOX2a was previously described, we characterize here the complete genomic sequence of DcAOX1.

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Research works printed but not linked: 2

  1. Arnholdt-Schmitt B. (1993b). Hormonsensitivitaet und Genomische DNS - Variabilitaet in Ihrem Bezug zur Ertragsbildung bei Daucus carota L. ssp. sativus: ein Beitrag zur Zellbiologie pflanzlichen Wachstums. Ph.D. thesis, Justus-Liebig-University Giessen Gießen.
  2. Cardoso H. G. Nogales A. Frederico A. M. Svensson J. T. Macedo E. S. Valadas V. (2015). “Natural AOX gene diversity,” in Alternative Respiratory Pathways in Higher Plants eds Gupta K. J. Mur L. A. J. Neelwarne B. (Oxford: John Wiley) 241– 254.

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Authors
Campos, M. D., Nogales, A., Cardoso, H. G., Kumar, S. R., Nobre, T., Sathishkumar, R., & Arnholdt-Schmitt, B.
Affiliations
University of Évora (PT)
Corresponding author
Cardoso, Hélia G.
Venue
Frontiers in Genetics
Published
2016-01-29
Volume
7
Pages
1-1
ISSN
1664-8021 (ISSN-L)
OpenAlex
W2253486968
Cited by
152
References
97
Citations by year
2026: 1 · 2024: 1 · 2023: 1 · 2022: 6 · 2021: 27 · 2020: 30 · 2019: 28 · 2018: 23 · 2017: 31 · 2016: 4
FWCI
14.90
Type
journal article
Language
en
Open access
Licence
cc-by
Locations
  • Frontiers in Genetics (publishedVersion, cc-by)
  • PubMed Central (publishedVersion, cc-by)
  • PubMed (publishedVersion)
  • DOAJ (DOAJ: Directory of Open Access Journals) (submittedVersion, cc-by-sa)
Funders
Fundação para a Ciência e a Tecnologia (SFRH/BD/65354/2009, Ciência 2007, Ciência 2008 (C2008-UE/ICAM/06), SFRH/BCC/52187/2013)
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Plant tissue culture and regeneration
  • Life Sciences › Agricultural and Biological Sciences › Plant Science › Plant Stress Responses and Tolerance
  • Life Sciences › Agricultural and Biological Sciences › Plant Science › Plant nutrient uptake and metabolism
Keywords
ascorbate oxidase, carrot, respiration rate, cellular reprogramming, lag phase, temperature effects, chilling stress, gene expression, genome sequence, root meristem, yield stability

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