Russeting in Apple Is Initiated After Exposure to Moisture Ends

I. Histological Evidence

verfasst von

Yun Hao Chen, Jannis Straube, Bishnu P. Khanal, Moritz Knoche, Thomas Debener

Abstract

Russeting (periderm formation) is a critical fruit-surface disorder in apple (Malus × domestica Borkh.). The first symptom of insipient russeting is cuticular microcracking. Humid and rainy weather increases russeting. The aim was to determine the ontogeny of moisture-induced russeting in ‘Pinova’ apple. We recorded the effects of duration of exposure to water and the stage of fruit development at exposure on microcracking, periderm formation and cuticle deposition. Early on (21 or 31 days after full bloom; DAFB) short periods (2 to 12 d) of moisture exposure induced cuticular microcracking—but not later on (66 or 93 DAFB). A periderm was not formed during moisture exposure but 4 d after exposure ended. A periderm was formed in the hypodermis beneath a microcrack. Russeting frequency and severity were low for up to 4 d of moisture exposure but increased after 6 d. Cuticle thickness was not affected by moisture for up to 8 d but decreased for longer exposures. Cuticular ridge thickness decreased around a microcrack. In general, moisture did not affect cuticular strain release. We conclude that a hypodermal periderm forms after termination of moisture exposure and after microcrack formation. Reduced cuticle deposition may cause moisture-induced microcracking and, thus, russeting.

Organisationseinheit(en)

Abteilung Obstbau
Institut für Gartenbauliche Produktionssysteme
Institut für Pflanzengenetik
Abteilung Molekulare Pflanzenzüchtung

Typ

Artikel

Journal

Plants

Band

9

Seiten

1-18

Anzahl der Seiten

18

Publikationsdatum

10.2020

Publikationsstatus

Veröffentlicht

Peer-reviewed

Ja

ASJC Scopus Sachgebiete

Ökologie, Evolution, Verhaltenswissenschaften und Systematik, Ökologie, Pflanzenkunde

Elektronische Version(en)

https://doi.org/10.3390/plants9101293 (Zugang: Offen)