Absorption of Foliar Applied Zn Fertilizers by Trichomes in Soybean and Tomato

Li, Cui, Wang, Peng, Lombi, Enzo, Cheng, Miaomiao, Tang, Caixian, Howard, Daryl L, Menzies, Neal W and Kopittke, Peter M (2018) Absorption of Foliar Applied Zn Fertilizers by Trichomes in Soybean and Tomato. Journal of experimental botany, . doi:10.1093/jxb/ery085

Author Li, Cui
Wang, Peng
Lombi, Enzo
Cheng, Miaomiao
Tang, Caixian
Howard, Daryl L
Menzies, Neal W
Kopittke, Peter M
Title Absorption of Foliar Applied Zn Fertilizers by Trichomes in Soybean and Tomato
Journal name Journal of experimental botany   Check publisher's open access policy
ISSN 1460-2431
Publication date 2018-03-03
Sub-type Article (original research)
DOI 10.1093/jxb/ery085
Open Access Status Not yet assessed
Abstract The present study investigated the role of trichomes in absorption of foliar-applied Zn fertilizers in soybean and tomato. Using synchrotron-based X-ray fluorescence microscopy for in situ analyses of hydrated leaves, we found that upon the foliar-application of ZnSO4, Zn accumulated within 15 min in some non-glandular trichomes of soybean, but not tomato. However, analyses of cross sections of soybean leaves did not show any marked accumulation of Zn in tissues surrounding trichomes. Furthermore, when near-isogenic lines of soybean differing 10-fold in trichome density were used to compare Zn absorption, it was found that foliar Zn absorption was not related to trichome density. Therefore, it is suggested that trichomes are not part of the primary pathway whereby foliar-applied Zn moves across the leaf surface in soybean and tomato. However, this does not preclude trichomes being important in other plant species, as trichomes are known to be highly diverse. We also compared the absorption of Zn when supplied as ZnSO4, with nano- and bulk-ZnO, finding that the absorption of Zn from ZnSO4 was ca. 10-fold higher than from nano- and bulk-ZnO, suggesting that Zn was mainly absorbed as soluble Zn. This study improves our understanding of the absorption of foliar-applied nutrients.
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status UQ

Document type: Journal Article
Sub-type: Article (original research)
Collection: Pubmed Import
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Created: Wed, 14 Mar 2018, 10:05:55 EST