Effect of locally increased zinc contents on zinc transport from the flag leaf lamina to the maturing grains of wheat

Herren, Thomas; Feller, Urs (1996). Effect of locally increased zinc contents on zinc transport from the flag leaf lamina to the maturing grains of wheat. Journal of plant nutrition, 19(2), pp. 379-387. Taylor & Francis 10.1080/01904169609365128

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From previous experiments, it was evident that the accumulation of zinc in maturing wheat grains is highly regulated, but the regulatory mechanisms involved are not yet identified. In this study, we determined the transfer of radiolabelled zinc (fed directly into a leaf flap) from the flag leaf lamina to the grains. We also determined how this zinc transfer was affected by feeding additional unlabeled zinc (1 μmol per plant) either into the flag leaf sheath or the peduncle. Most of the 65Zn was retained in the feeding flap. A high percentage of the zinc exported from the flap accumulated in the grains with little accumulation of radiolabel in the other parts of the shoot. Unlabeled zinc remained mainly in the feeding flap and in the parts reached by the transpiration stream from the feeding position. The transfer of radiolabelled zinc was essentially not influenced by unlabeled zinc fed into another plant part. Our results suggest that the loading of zinc into the phloem and the mass flow in the sieve tubes might regulate zinc redistribution within the wheat shoot.

Item Type:

Journal Article (Original Article)

Division/Institute:

08 Faculty of Science > Department of Biology > Institute of Plant Sciences (IPS) > Plant nutrition (discontinued)
08 Faculty of Science > Department of Biology > Institute of Plant Sciences (IPS)

UniBE Contributor:

Feller, Urs

Subjects:

500 Science > 580 Plants (Botany)

ISSN:

0190-4167

Publisher:

Taylor & Francis

Language:

English

Submitter:

Peter Alfred von Ballmoos-Haas

Date Deposited:

13 Jul 2016 10:28

Last Modified:

05 Jul 2017 09:34

Publisher DOI:

10.1080/01904169609365128

BORIS DOI:

10.7892/boris.83866

URI:

https://boris.unibe.ch/id/eprint/83866

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