ABI5 Is a Regulator of Seed Maturation and Longevity in Legumes.

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  • Additional Information
    • Source:
      Publisher: Oxford University Press Country of Publication: England NLM ID: 9208688 Publication Model: Print-Electronic Cited Medium: Internet ISSN: 1532-298X (Electronic) Linking ISSN: 10404651 NLM ISO Abbreviation: Plant Cell Subsets: MEDLINE
    • Publication Information:
      Publication: 2021- : [Oxford] : Oxford University Press
      Original Publication: Rockville, MD : American Society of Plant Physiologists, c1989-
    • Subject Terms:
      Medicago truncatula/*metabolism ; Medicago truncatula/*physiology ; Pisum sativum/*metabolism ; Pisum sativum/*physiology ; Plant Proteins/*metabolism ; Seeds/*metabolism ; Seeds/*physiology ; Transcription Factors/*metabolism; Carotenoids/metabolism ; Chlorophyll/metabolism ; Gene Expression Regulation, Plant/genetics ; Gene Expression Regulation, Plant/physiology ; Medicago truncatula/genetics ; Pisum sativum/genetics ; Plant Proteins/genetics ; Seeds/genetics ; Transcription Factors/genetics
    • Abstract:
      The preservation of our genetic resources and production of high-quality seeds depends on their ability to remain viable and vigorous during storage. In a quantitative trait locus analysis on seed longevity in Medicago truncatula, we identified the bZIP transcription factor ABSCISIC ACID INSENSITIVE5 (ABI5). Characterization of Mt-abi5 insertion mutant seeds revealed that both the acquisition of longevity and dormancy were severely impaired. Using transcriptomes of developing Mt-abi5 seeds, we created a gene coexpression network and revealed ABI5 as a regulator of gene modules with functions related to raffinose family oligosaccharide (RFO) metabolism, late embryogenesis abundant (LEA) proteins, and photosynthesis-associated nuclear genes (PhANGs). Lower RFO contents in Mt-abi5 seeds were linked to the regulation of SEED IMBIBITION PROTEIN1 Proteomic analysis confirmed that a set of LEA polypeptides was reduced in mature Mt-abi5 seeds, whereas the absence of repression of PhANG in mature Mt-abi5 seeds was accompanied by chlorophyll and carotenoid retention. This resulted in a stress response in Mt-abi5 seeds, evident from an increase in α-tocopherol and upregulation of genes related to programmed cell death and protein folding. Characterization of abi5 mutants in a second legume species, pea (Pisum sativum), confirmed a role for ABI5 in the regulation of longevity, seed degreening, and RFO accumulation, identifying ABI5 as a prominent regulator of late seed maturation in legumes.
      (© 2016 American Society of Plant Biologists. All rights reserved.)
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    • Accession Number:
      0 (Plant Proteins)
      0 (Transcription Factors)
      1406-65-1 (Chlorophyll)
      36-88-4 (Carotenoids)
    • Publication Date:
      Date Created: 20161214 Date Completed: 20171107 Latest Revision: 20240109
    • Publication Date:
      20240109
    • Accession Number:
      PMC5155344
    • Accession Number:
      10.1105/tpc.16.00470
    • Accession Number:
      27956585