Response of 'Clausellina' Satsuma mandarin to 3,5,6-trichloro-2-pirydiloxyacetic acid and fruitlet abscission

The application of the synthetic auxin 3,5,6-trichloro-2-piridyloxyacetic acid (3,5,6-TPA) isopropyl ester at the onset of cell enlargement stage, significantly thinned fruitlets in 'Clausellina' Satsuma mandarin. The magnitude of the response was related to the concentration applied, incr...

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Published inPlant growth regulation Vol. 53; no. 2; pp. 129 - 135
Main Authors Agustí, Manuel, Juan, Mariano, Almela, Vicente
Format Journal Article
LanguageEnglish
Published Dordrecht Dordrecht : Springer Netherlands 01.11.2007
Springer Nature B.V
Subjects
Abscission
auxins
cell growth
Citrus
ethylene
fruiting
Fruits
leaves
satsumas
Synthetic auxins
triclopyr
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Summary:The application of the synthetic auxin 3,5,6-trichloro-2-piridyloxyacetic acid (3,5,6-TPA) isopropyl ester at the onset of cell enlargement stage, significantly thinned fruitlets in 'Clausellina' Satsuma mandarin. The magnitude of the response was related to the concentration applied, increasing the percentage of abscised fruit with higher concentrations, which was up to 70% at 25 mg l-¹. The magnitude of the response also depended on the organ subject to treatment, abscission being greater when applied to the leaves rather than to fruit. Results suggest that a photosynthetic disorder was responsible for a reduction in fruit growth rate, triggering abscission mechanisms producing ethylene and abscission.
Bibliography:http://dx.doi.org/10.1007/s10725-007-9210-2
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ISSN:0167-6903
1573-5087
DOI:10.1007/s10725-007-9210-2