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The aba mutant of Arabidopsis thaliana is impaired in epoxy-carotenoid biosynthesis.
Open accessAbstract
The three mutant alleles of the ABA locus of Arabidopsis thaliana result in plants that are deficient in the plant growth regulator abscisic acid (ABA). We have used 18O2 to label ABA in water-stressed leaves of mutant and wild-type Arabidopsis. Analysis by selected ion monitoring and tandem mass spectrometry of [18O]ABA and its catabolites, phaseic acid and ABA-glucose ester (beta-D-glucopyranosyl abscisate), indicates that the aba genotypes are impaired in ABA biosynthesis and have a small ABA precursor pool of compounds that contain oxygens on the ring, presumably oxygenated carotenoids (xanthophylls). Quantitation of the carotenoids from mutant and wild-type leaves establishes that the aba alleles cause a deficiency of the epoxy-carotenoids violaxanthin and neoxanthin and an accumulation of their biosynthetic precursor, zeaxanthin. These results provide evidence that ABA is synthesized by oxidative cleavage of epoxy-carotenoids (the "indirect pathway"). Furthermore the carotenoid mutant we describe undergoes normal greening. Thus the aba alleles provide an opportunity to study the physiological roles of epoxy-carotenoids in photosynthesis in a higher plant.
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Citations
Cited by
Cell Signaling during Cold, Drought, and Salt Stress
Xiong, L., Schumaker, K. S., & Zhu, J.-K. (2002) · The Plant Cell · doi:10.1105/tpc.000596 · Cited by 2,372
Carotenoid Metabolism in Plants
Nisar, N., Li, L., Lu, S., Khin, N. C., & Pogson, B. J. (2015) · Molecular Plant · doi:10.1016/j.molp.2014.12.007 · Cited by 1,255
Genetic control of abscisic acid biosynthesis in maize
Tan, B. C., Schwartz, S. H., Zeevaart, J. A. D., & McCarty, D. R. (1997) · Proceedings of the National Academy of Sciences · doi:10.1073/pnas.94.22.12235 · Cited by 629
Self-citationKato, M., Ikoma, Y., Matsumoto, H., Sugiura, M., Hyodo, H., & Yano, M. (2004) · Plant Physiology · doi:10.1104/pp.103.031104 · Cited by 508
Biogenesis, molecular regulation and function of plant isoprenoids.
Bouvier, F., Rahier, A., & Camara, B. (2005) · Progress in Lipid Research · doi:10.1016/j.plipres.2005.09.003 · Cited by 498
Metadata
- Authors
- Rock, C. D., & Zeevaart, J. A.
- Venue
- Proceedings of the National Academy of Sciences
- Published
- 1991-09
- Volume
- 88
- Issue
- 17
- Pages
- 7496-7499
- ISSN
- 0027-8424 (ISSN-L)
- 1091-6490
- OpenAlex
- W2031073718
- Cited by
- 355
- References
- 0
- FWCI
- 4.95
- Type
- journal article
- Language
- en
- Open access
- green
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- Rock, C. D., & Zeevaart, J. A. (1991). The aba mutant of Arabidopsis thaliana is impaired in epoxy-carotenoid biosynthesis. Proceedings of the National Academy of Sciences. https://doi.org/10.1073/pnas.88.17.7496
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