Uptake, subcellular distribution, and translocation of foliar-applied phosphorus Short-term effects on ion relations in deficient young maize plants

Uptake, subcellular distribution, and translocation of foliar-applied phosphorus : Short-term effects on ion relations in deficient young maize plants

Copyright © 2021 Elsevier Masson SAS. All rights reserved.

Bibliographische Detailangaben
Veröffentlicht in:Plant physiology and biochemistry : PPB. - 1991. - 166(2021) vom: 01. Sept., Seite 677-688
1. Verfasser: Görlach, Bruno Maximilian (VerfasserIn)
Weitere Verfasser: Sagervanshi, Amit, Henningsen, Jon Niklas, Pitann, Britta, Mühling, Karl Hermann
Format: Online-Aufsatz
Sprache:English
Veröffentlicht: 2021
Zugriff auf das übergeordnete Werk:Plant physiology and biochemistry : PPB
Schlagworte:Journal Article Apoplast Foliar absorption Phosphate deficiency Subcellular Symplast Phosphorus 27YLU75U4W
Beschreibung
Zusammenfassung:Copyright © 2021 Elsevier Masson SAS. All rights reserved.
One crucial aspect for successful foliar application is the uptake of the nutrient into the symplast for metabolization by the plant. Our aim was to determine the subcellular distribution of foliar-applied P in leaves, the translocation of this element within the whole plant, and its impact on the ion status of P-deficient maize plants within the first 48 h of treatment. Maize plants with P deficiency were sprayed with 200 mM KH2PO4. After 6, 24, and 48 h, the 5th leaf of each plant was harvested for the isolation of apoplastic washing fluid, cell sap, and vascular bundle sap and for the examination of transporter gene expression. The remaining tissues were divided into 4th leaf, older and younger shoots, and root for total P determination. No accumulation of foliar-applied P was measured in the apoplast. P was mostly taken up into the cytosol within the first 6 h and was associated with increased mRNA levels of PHT1 transporters. A strong tendency towards rapid translocation into the younger shoot and an increase in NO3- uptake or a decrease in organic acid translocation were observed. The apoplast seems to exert no effect on the uptake of foliar-applied P into the epidermal and mesophyll cells of intact leaves. Instead, the plant responds with the rapid translocation of P and changes in ion status to generate further growth. The effect of the absorbed foliar-applied P is assumed to be a rapid process with no transient storage in the leaf apoplast
Beschreibung:Date Completed 07.09.2021
Date Revised 07.09.2021
published: Print-Electronic
Citation Status MEDLINE
ISSN:1873-2690
DOI:10.1016/j.plaphy.2021.06.028