Cited by 94Plant-Microbe Interactions and ImmunityPlant Gene Expression AnalysisPlant Physiology and Cultivation Studies

Relationship Between Growth, Secondary Metabolism, and Resistance of Apple

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Rühmann, S., Leser, C., Bannert, M., Treutter, D.·2002·Plant Biology

Abstract

Abstract: The paper shows that N‐induced vigorous shoot growth increases susceptibility of apple trees to Venturia inaequalis. This is due to a weakened defence in infected leaves of the high N cultures showing large lesions with excessive sporulation, whereas infected leaves from the low N cultures exhibited successful defence with only small chlorotic lesions and no sporulation. This might be explained by biosynthesis of phenylpropanoids in the young leaves of the resistant trees. A negative correlation between shoot growth of apple trees and the concentration of phenolic compounds in young leaves was found. Studies on in vitro shoot cultures revealed that the availability of sugars for the phenylpropanoid pathway is a strong regulatory factor. The ratio of sucrose and nitrogen in the medium influenced the total level of secondary products in the in vitro grown plantlets. Moreover, the relative deficiency of sugars was responsible for a metabolic block mainly at the level of glucosyl transferase and concomitant aglycone accumulation.

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Crossref · 10.1055/s-2002-25727

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Authors
Rühmann, S., Leser, C., Bannert, M., & Treutter, D.
Affiliations
Technical University of Munich (DE)
Corresponding author
Treutter, D.
Venue
Plant Biology
Publisher
Wiley
Published
2002-03
Volume
4
Issue
2
Pages
137-143
ISSN
  • 1435-8603 (ISSN-L)
  • 1438-8677
OpenAlex
W2029319052
Cited by
93
References
17
Citations by year
2026: 3 · 2025: 5 · 2024: 4 · 2023: 2 · 2022: 5 · 2021: 3 · 2020: 4 · 2019: 4 · 2018: 4 · 2017: 3 · 2016: 4 · 2015: 6 · 2014: 5 · 2013: 3 · 2012: 5
FWCI
4.21
Type
journal article
Language
en
Open access
Locations
Plant Biology (publishedVersion)
Funders
Deutsche Forschungsgemeinschaft (SFB 607)
Topics
  • Life Sciences › Agricultural and Biological Sciences › Plant Science › Plant-Microbe Interactions and Immunity
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Plant Gene Expression Analysis
  • Life Sciences › Agricultural and Biological Sciences › Plant Science › Plant Physiology and Cultivation Studies
Keywords
apple, Venturia inaequalis, powdery mildew, nitrogen nutrition, shoot growth, secondary metabolism, phenylpropanoids, phenolic compounds, plant disease resistance, sporulation, sugar availability, in vitro shoot culture

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