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Manganese soil and foliar fertilization of olive plantlets: the effect on leaf mineral and phenolic content and root mycorrhizal colonization
Author(s) -
Pasković Igor,
Herak Ćustić Mirjana,
Pecina Marija,
Bronić Josip,
Ban Dean,
Radić Tomislav,
Pošćić Filip,
Jukić Špika Maja,
Soldo Barbara,
Palčić Igor,
Goreta Ban Smiljana
Publication year - 2018
Publication title -
journal of the science of food and agriculture
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.782
H-Index - 142
eISSN - 1097-0010
pISSN - 0022-5142
DOI - 10.1002/jsfa.9196
Subject(s) - chemistry , calcareous , manganese , horticulture , oleuropein , ammonium , citric acid , chlorosis , shoot , agronomy , botany , biology , antioxidant , food science , biochemistry , organic chemistry
Abstract BACKGROUND The present study aimed to examine the effect of foliar (Mn_fol) and soil Zeolite‐Mn (Mn_ZA) application on leaf mineral, total phenolic and oleuropein content, and mycorrhizae colonization of self‐rooted cv. Leccino plantlets grown on calcareous soil. RESULTS The dissolution of zeolite was 97% when citric acid was applied at 0.05 mM dm −3 , suggesting that organic acids excreted by roots can dissolve modified zeolite (Mn_ZA), making Mn available for plant uptake. The leaf Mn concentration was the highest for Mn_fol treatment at 90 days after transplanting (DAT) (172 mg kg −1 ) and 150 DAT (70 mg kg −1 ) compared to other treatments. Mn_ZA soil application increased leaf Mn concentration at 150 DAT compared to control and NPK treatments. The oleuropein leaf content was highest for Mn_fol compared to other treatments at 90 DAT and lowest at 150 DAT. Arbuscular mycorrhizal colonization was higher for Mn_fol treatment at 150 DAT compared to all other treatments. CONCLUSION Changes in the arbuscular colonization percentage and oleuropein content may be connected to stress conditions provoked by a high leaf Mn concentration in the Mn_fol treatment at 90 DAT. Mn_ZA application increased leaf Mn concentration at 150 DAT compared to control and NPK treatments. It can be assumed that the dominant mechanism in Mn uptake from modified zeolite is Mn_ZA dissolution through root exudates. © 2018 Society of Chemical Industry