Europe PMC

This website requires cookies, and the limited processing of your personal data in order to function. By using the site you are agreeing to this as outlined in our privacy notice and cookie policy.

Association of the benzoxazinoid pathway with boron homeostasis in maize.

Author information

Affiliations

  • 1. Institute of Crop Science and Resource Conservation, Crop Functional Genomics, University of Bonn, Friedrich-Ebert-Allee 144, 53113 Bonn, Germany.
      Authors
    • Chu L 1
    • Schäfer CC 1
    • Hochholdinger F 1
    • Matthes MS 1
    (4 authors)
  • 2. Division of Biological Sciences, Bond Life Sciences Center, Interdisciplinary Plant Group, and Missouri Maize Center, University of Missouri, Columbia, MO 65211-7310, USA.
      Authors
    • Shrestha V 2
    • Meyer GW 2
    • Darnell Z 2
    • Kling T 2
    • McSteen P 2
    • Angelovici R 2
    (6 authors)
  • 3. Boron-Containing Functional Materials, Institute of Inorganic Chemistry and Institute for Sustainable Chemistry & Catalysis with Boron, University of Würzburg, Am Hubland, 97074 Würzburg, Germany.
      Authors
    • Niedens J 3
    • Nowak-Król A 3
    (2 authors)
  • 4. Institute of Organic Chemistry, University of Freiburg, Albertstr. 21, 79104 Freiburg i. B., Germany.
      Authors
    • Dürr-Mayer T 4
    • Jessen H 4
    (2 authors)
  • 5. Chair of Plant Breeding, Technical University of Munich, Liesel-Beckman Str. 2, 85354 Freising, Germany.
      Authors
    • Abramov A 5
    • Frey M 5
    (2 authors)
    • Show all (6)

ORCIDs linked to this article

Show all (14)

Plant Physiology, 08 Nov 2024, :kiae611
https://doi.org/10.1093/plphys/kiae611 PMID: 39514757 

This article is based on a previously available preprint.

Abstract 

Both deficiency and toxicity of the micronutrient boron lead to severe reductions in crop yield. Despite this agricultural importance, the molecular basis underlying boron homeostasis in plants remains unclear. To identify molecular players involved in boron homeostasis in maize (Zea mays L.), we measured boron levels in the Goodman-Buckler association panel and performed genome-wide association studies. These analyses identified a benzoxazinless (bx) gene, bx3, involved in the biosynthesis of benzoxazinoids, such as DIMBOA, which are major defense compounds in maize. Genes involved in DIMBOA biosynthesis are all located in close proximity in the genome, and benzoxazinoid biosynthesis mutants, including bx3, are all DIMBOA deficient. We determined that leaves of the bx3 mutant have a greater boron concentration than those of B73 control plants, which corresponded with enhanced leaf tip necrosis, a phenotype associated with boron toxicity. By contrast, other DIMBOA-deficient maize mutants did not show altered boron levels or the leaf tip necrosis phenotype, suggesting that boron is not associated with DIMBOA. Instead, our analyses suggest that the accumulation of boron is linked to the benzoxazinoid intermediates indolin-2-one (ION) and 3-hydroxy-ION. Therefore, our results connect boron homeostasis to the benzoxazinoid plant defense pathway through bx3 and specific intermediates, rendering the benzoxazinoid biosynthesis pathway a potential target for crop improvement under inadequate boron conditions.

Full text links 

Read article at publisher's site: https://doi.org/10.1093/plphys/kiae611

Citations & impact 

This article has not been cited yet.

Impact metrics

Alternative metrics

Altmetric item for https://www.altmetric.com/details/170312039
Altmetric
Discover the attention surrounding your research
https://www.altmetric.com/details/170312039