Rice Genotype Differences in Tolerance of Zinc-Deficient Soils: Evidence for the Importance of Root-Induced Changes in the Rhizosphere

Frontiers in Plant Science
Asako MoriMatthias Wissuwa

Abstract

Zinc (Zn) deficiency is a major constraint to rice production and Zn is also often deficient in humans with rice-based diets. Efforts to breed more Zn-efficient rice are constrained by poor understanding of the mechanisms of tolerance to deficiency. Here we assess the contributions of root growth and root Zn uptake efficiency, and we seek to explain the results in terms of specific mechanisms. We made a field experiment in a highly Zn-deficient rice soil in the Philippines with deficiency-tolerant and -sensitive genotypes, and measured growth, Zn uptake and root development. We also measured the effect of planting density. Tolerant genotypes produced more crown roots per plant and had greater uptake rates per unit root surface area; the latter was at least as important as root number to overall tolerance. Tolerant and sensitive genotypes took up more Zn per plant at greater planting densities. The greater uptake per unit root surface area, and the planting density effect can only be explained by root-induced changes in the rhizosphere, either solubilizing Zn, or neutralizing a toxin that impedes Zn uptake (possibly [Formula: see text] or Fe(2+)), or both. Traits for these and crown root number are potential breeding targets.

References

Mar 7, 2002·The Journal of Nutrition·Glenn B Gregorio
Oct 22, 2002·JAMA : the Journal of the American Medical Association·Gro Harlem Brundtland
Jan 31, 2006·The Proceedings of the Nutrition Society·Rosalind S Gibson
Aug 15, 2006·Plant Physiology·Matthias WissuwaSeiji Yanagihara
Feb 9, 2007·The New Phytologist·Martin R BroadleyAlexander Lux
May 29, 2009·Food and Nutrition Bulletin·Sonja Y HessKenneth H Brown
Nov 26, 2009·Plant, Cell & Environment·Tim ArnoldDominik J Weiss
Jul 23, 2011·Plant, Cell & Environment·Mariya PtashnykGuy J D Kirk
Jun 1, 2011·Functional Plant Biology : FPB·Michael T RoseMatthias Wissuwa
Nov 1, 1994·The New Phytologist·C B M BeggH-U Neue

❮ Previous
Next ❯

Citations

Apr 12, 2016·Frontiers in Plant Science·Amrit K Nanda, Matthias Wissuwa
Aug 6, 2019·Plant, Cell & Environment·Guy J D KirkTiina Roose
Jul 2, 2017·Journal of Plant Research·Jae-Sung LeeAbdelbagi M Ismail
Sep 13, 2017·Plant, Cell & Environment·Marie-Cecile AffholderGuy J D Kirk
Jun 18, 2017·TAG. Theoretical and applied genetics. Theoretische und angewandte Genetik·Jae-Sung LeeMatthias Wissuwa
Dec 7, 2021·Frontiers in Plant Science·Jianqin XuFutong Yu

❮ Previous
Next ❯

Methods Mentioned

BETA
atomic emission
RSA

Software Mentioned

Excel Linear
Excel
WinRHIZO
Statistix

Related Concepts

Trending Feeds

COVID-19

Coronaviruses encompass a large family of viruses that cause the common cold as well as more serious diseases, such as the ongoing outbreak of coronavirus disease 2019 (COVID-19; formally known as 2019-nCoV). Coronaviruses can spread from animals to humans; symptoms include fever, cough, shortness of breath, and breathing difficulties; in more severe cases, infection can lead to death. This feed covers recent research on COVID-19.

Blastomycosis

Blastomycosis fungal infections spread through inhaling Blastomyces dermatitidis spores. Discover the latest research on blastomycosis fungal infections here.

Nuclear Pore Complex in ALS/FTD

Alterations in nucleocytoplasmic transport, controlled by the nuclear pore complex, may be involved in the pathomechanism underlying multiple neurodegenerative diseases including Amyotrophic Lateral Sclerosis and Frontotemporal Dementia. Here is the latest research on the nuclear pore complex in ALS and FTD.

Applications of Molecular Barcoding

The concept of molecular barcoding is that each original DNA or RNA molecule is attached to a unique sequence barcode. Sequence reads having different barcodes represent different original molecules, while sequence reads having the same barcode are results of PCR duplication from one original molecule. Discover the latest research on molecular barcoding here.

Chronic Fatigue Syndrome

Chronic fatigue syndrome is a disease characterized by unexplained disabling fatigue; the pathology of which is incompletely understood. Discover the latest research on chronic fatigue syndrome here.

Evolution of Pluripotency

Pluripotency refers to the ability of a cell to develop into three primary germ cell layers of the embryo. This feed focuses on the mechanisms that underlie the evolution of pluripotency. Here is the latest research.

Position Effect Variegation

Position Effect Variagation occurs when a gene is inactivated due to its positioning near heterochromatic regions within a chromosome. Discover the latest research on Position Effect Variagation here.

STING Receptor Agonists

Stimulator of IFN genes (STING) are a group of transmembrane proteins that are involved in the induction of type I interferon that is important in the innate immune response. The stimulation of STING has been an active area of research in the treatment of cancer and infectious diseases. Here is the latest research on STING receptor agonists.

Microbicide

Microbicides are products that can be applied to vaginal or rectal mucosal surfaces with the goal of preventing, or at least significantly reducing, the transmission of sexually transmitted infections. Here is the latest research on microbicides.