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Cited by 348Flowering Plant Growth and CultivationPlant Growth Enhancement TechniquesPlant Physiology and Cultivation Studies

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Paclobutrazol as a plant growth regulator

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Desta, Bizuayehu, Amare, Getachew·2021·Chemical and Biological Technologies in Agriculture
DOI 10.1186/s40538-020-00199-z
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Abstract

Plant growth regulators are chemical substances which govern all the factors of development and growth within plants. The application of plant growth regulators to crops modifies hormonal balance and growth leading to increased yield, enhanced crop tolerance against abiotic stress and improved physiological trait of crops. Paclobutrazol (PBZ) [(2RS, 3RS)-1-(4-chlorophenyl)- 4, 4-dimethyl-2-(1H-1, 2, 4-trizol-1-yl)-pentan-3-ol], is one of the members of triazole family having growth regulating property. The growth regulating properties of PBZ are mediated by changes in the levels of important plant hormones including the gibberellins (GAs), abscisic acid (ABA) and cytokinins (CK). PBZ affects the isoprenoid pathway, and alters the levels of plant hormones by inhibiting gibberellin synthesis and increasing cytokinins level and consequent reduction in stem elongation. When gibberellins synthesis is inhibited, more precursors in the terpenoid pathway accumulate and that resulted in the production of abscisic acid. PBZ is more effective when applied to the growing media and application on the growing medium would give longer absorption time and more absorption of active ingredient than foliar spray. The application of PBZ to crops is important in reducing plant height to prevent lodging and in increasing number and weight of fruits per tree, in improving the fruit quality in terms of increases in carbohydrates, TSS, TSS/TA and decreases acidity. It further reduces evapo-transpiration and decreases plant moisture stress by enhancing the relative water content of leaf area and develops resistance in the plants against biotic and abiotic stresses. In addition, it acts as highly active systemic fungicide and used against several economically important fungal diseases. In this review, the current knowledge and possible applications of PBZ, which can be used to improve the growth, yield and quality of crops, have been reviewed and discussed. The role of PBZ to mitigate the harmful effects of environmental stresses in crops is also examined. Moreover, various biochemical and physiological processes leading to improved crop production under the effect of PBZ are discoursed in detail.

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Metadata

Authors
Desta, B., & Amare, G.
Affiliations
Debre Berhan University (ET)
Corresponding author
Desta, Bizuayehu
ORCID
Desta, Bizuayehu
Venue
Chemical and Biological Technologies in Agriculture
Publisher
Springer Science and Business Media LLC
Published
2021-01-07
Volume
8
Issue
1
ISSN
2196-5641 (ISSN-L)
DOI
10.1186/s40538-020-00199-z
OpenAlex
W3165137375
Cited by
348
References
0
Citations by year
2026: 60 · 2025: 68 · 2024: 88 · 2023: 66 · 2022: 52 · 2021: 14
FWCI
33.04
Type
journal article
Language
en
Open access
Licence
Locations
  • Chemical and Biological Technologies in Agriculture (publishedVersion, cc-by)
  • DOAJ (DOAJ: Directory of Open Access Journals) (submittedVersion, cc-by-sa)
Topics
  • Life Sciences › Agricultural and Biological Sciences › Plant Science › Flowering Plant Growth and Cultivation
  • Life Sciences › Agricultural and Biological Sciences › Plant Science › Plant Growth Enhancement Techniques
  • Life Sciences › Agricultural and Biological Sciences › Plant Science › Plant Physiology and Cultivation Studies
Keywords
paclobutrazol, plant growth regulators, triazoles, abscisic acid, cytokinins, stem elongation, lodging control, fruit yield and quality, fruit quality, abiotic stress tolerance, biotic stress resistance, systemic fungicides, foliar application, transpiration reduction, relative water content

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Desta, B., & Amare, G. (2021). Paclobutrazol as a plant growth regulator. Chemical and Biological Technologies in Agriculture. https://doi.org/10.1186/s40538-020-00199-z