Cited by 347Plant nutrient uptake and metabolismPlant Molecular Biology ResearchPlant tissue culture and regeneration

Antisense repression of vacuolar and cell wall invertase in transgenic carrot alters early plant development and sucrose partitioning

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Tang, Guo-Qing, Lüscher, Marcel, Sturm, Arnd·1999·The Plant Cell

Abstract

To unravel the functions of cell wall and vacuolar invertases in carrot, we used an antisense technique to generate transgenic carrot plants with reduced enzyme activity. Phenotypic alterations appeared at very early stages of development; indeed, the morphology of cotyledon-stage embryos was markedly changed. At the stage at which control plantlets had two to three leaves and one primary root, shoots of transgenic plantlets did not separate into individual leaves but consisted of stunted, interconnected green structures. When transgenic plantlets were grown on media containing a mixture of sucrose, glucose, and fructose rather than sucrose alone, the malformation was alleviated, and plantlets looked normal. Plantlets from hexose-containing media produced mature plants when transferred to soil. Plants expressing antisense mRNA for cell wall invertase had a bushy appearance due to the development of extra leaves, which accumulated elevated levels of sucrose and starch. Simultaneously, tap root development was markedly reduced, and the resulting smaller organs contained lower levels of carbohydrates. Compared with control plants, the dry weight leaf-to-root ratio of cell wall invertase antisense plants was shifted from 1:3 to 17:1. Plants expressing antisense mRNA for vacuolar invertase also had more leaves than did control plants, but tap roots developed normally, although they were smaller, and the leaf-to-root ratio was 1.5:1. Again, the carbohydrate content of leaves was elevated, and that of roots was reduced. Our data suggest that acid invertases play an important role in early plant development, most likely via control of sugar composition and metabolic fluxes. Later in plant development, both isoenzymes seem to have important functions in sucrose partitioning.

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Research works printed but not linked: 3

  1. Rees, T. (1974). Pathways of carbohydrate breakdown in higher plants. In Biochemistry, Series I, Vol. XI, Plant Biochemistry, D.H. Northcote, ed (London: Butterworth), pp. 89-127.
  2. Kruger, J.N. (1990). Carbohydrate synthesis and degradation. In Plant Physiology, Biochemistry, and Molecular Biology, D.T. Dennis and D.H. Turpin, eds (Harlow, UK: Longman Scientific and Technical Publishers), pp. 59-76.
  3. Peterson, C.E., and Simon, P.W. (1986). Carrot breeding. In Breed- ing Vegetable Crops, M.J. Bassett, ed (Westport, CT: AVI), pp. 321-356.

Cited by

Authors
Tang, G.-Q., Lüscher, M., & Sturm, A.
Affiliations
  • Friedrich Miescher Institute (CH)
  • University of Basel (CH)
Venue
The Plant Cell
Published
1999-02
Volume
11
Issue
2
Pages
177-189
ISSN
  • 1040-4651 (ISSN-L)
  • 1532-298X
OpenAlex
W2030677522
Cited by
347
References
43
Citations by year
2026: 6 · 2025: 8 · 2024: 6 · 2023: 3 · 2022: 12 · 2021: 16 · 2020: 14 · 2019: 15 · 2018: 15 · 2017: 11 · 2016: 18 · 2015: 13 · 2014: 19 · 2013: 14 · 2012: 8
FWCI
22.47
Type
journal article
Language
en
Open access
Locations
  • The Plant Cell (publishedVersion)
  • PubMed Central (publishedVersion)
  • PubMed (publishedVersion)
Topics
  • Life Sciences › Agricultural and Biological Sciences › Plant Science › Plant nutrient uptake and metabolism
  • Life Sciences › Agricultural and Biological Sciences › Plant Science › Plant Molecular Biology Research
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Plant tissue culture and regeneration
Keywords
vacuolar invertase, cell wall invertase, antisense inhibition, carrot, sucrose partitioning, early plant development, cotyledon morphology, starch accumulation, sugar metabolism, isozymes
MeSH terms
Cell Wall, Glycoside Hydrolases, Phenotype, Sucrose, Vacuoles, Plant Leaves, Plant Roots, Daucus carota, Oligodeoxyribonucleotides, Antisense, Plants, Genetically Modified, beta-Fructofuranosidase

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