The Response of the Root Apex in Plant Adaptation to Iron Heterogeneity in Soil

Li, Guangjie; Kronzucker, Herbert J.; Shi, Weiming

doi:10.3389/fpls.2016.00344

Cited by 24 publications

(20 citation statements)

References 108 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Clear differences in Fe acquisition between carbonate‐adapted and nonadapted demes were observed. When plants were grown on our carbonate‐rich soil, leaf Fe concentrations of around 50 μg g −1 in dry weight in our (−C) demes were observed, an Fe concentration indicative of severe Fe deficiency (Li, Kronzucker, & Shi, ). Contrastingly, under the same growth conditions, (+C) plants had sufficient Fe concentrations of around 100 μg of Fe g −1 in dry weight (Waters & Troupe, ).…”

Section: Discussionmentioning

confidence: 87%

Soil carbonate drives local adaptation in Arabidopsis thaliana

Terés

Busoms

Martín

et al. 2019

Plant Cell & Environment

View full text Add to dashboard Cite

High soil carbonate limits crop performance especially in semiarid or arid climates. To understand how plants adapt to such soils, we explored natural variation in tolerance to soil carbonate in small local populations (demes) of Arabidopsis thaliana growing on soils differing in carbonate content. Reciprocal field-based transplants on soils with elevated carbonate (+C) and without carbonate (−C) over several years revealed that demes native to (+C) soils showed higher fitness than those native to (−C) soils when both were grown together on carbonate-rich soil. This supports the role of soil carbonate as a driving factor for local adaptation. Analyses of contrasting demes revealed key mechanisms associated with these fitness differences. Under controlled conditions, plants from the tolerant deme A1 (+C) native to (+C) soil were more resistant to both elevated carbonate and iron deficiency than plants from the sensitive T6 (−C) deme native to (−C) soil. Resistance of A1 (+C) to elevated carbonate was associated with higher root extrusion of both protons and coumarin-type phenolics. Tolerant A1 (+C) also had better Ca-exclusion than sensitive T6 (−C) . We conclude that Arabidopsis demes are locally adapted in their native habitat to soils with moderately elevated carbonate. This adaptation is associated with both enhanced iron acquisition and calcium exclusion.

show abstract

Section: Discussionmentioning

confidence: 87%

Soil carbonate drives local adaptation in Arabidopsis thaliana

Terés

Busoms

Martín

et al. 2019

Plant Cell & Environment

View full text Add to dashboard Cite

show abstract

“…The key regulators of plasma membrane transporters OsA1 to OsA10 , OsIRT1 , OsIRT2 , OsFRO2 , and OsZIP1 to OsZIP10 are directly involved in Fe capture [ 2 , 16 , 19 , 22 , 119 ]. In addition to that, fundamental helix-loop-helix transcription factors regulate the expression of FRO2 that is involved in regulating Fe uptake [ 45 , 120 , 121 ].…”

Section: Physiological Basis Of Tolerance Of Ft and Fdmentioning

confidence: 99%

Tolerance of Iron-Deficient and -Toxic Soil Conditions in Rice

Mahender

Swamy

Anandan

et al. 2019

Plants

164

View full text Add to dashboard Cite

Iron (Fe) deficiency and toxicity are the most widely prevalent soil-related micronutrient disorders in rice (Oryza sativa L.). Progress in rice cultivars with improved tolerance has been hampered by a poor understanding of Fe availability in the soil, the transportation mechanism, and associated genetic factors for the tolerance of Fe toxicity soil (FTS) or Fe deficiency soil (FDS) conditions. In the past, through conventional breeding approaches, rice varieties were developed especially suitable for low- and high-pH soils, which indirectly helped the varieties to tolerate FTS and FDS conditions. Rice-Fe interactions in the external environment of soil, internal homeostasis, and transportation have been studied extensively in the past few decades. However, the molecular and physiological mechanisms of Fe uptake and transport need to be characterized in response to the tolerance of morpho-physiological traits under Fe-toxic and -deficient soil conditions, and these traits need to be well integrated into breeding programs. A deeper understanding of the several factors that influence Fe absorption, uptake, and transport from soil to root and above-ground organs under FDS and FTS is needed to develop tolerant rice cultivars with improved grain yield. Therefore, the objective of this review paper is to congregate the different phenotypic screening methodologies for prospecting tolerant rice varieties and their responsible genetic traits, and Fe homeostasis related to all the known quantitative trait loci (QTLs), genes, and transporters, which could offer enormous information to rice breeders and biotechnologists to develop rice cultivars tolerant of Fe toxicity or deficiency. The mechanism of Fe regulation and transport from soil to grain needs to be understood in a systematic manner along with the cascade of metabolomics steps that are involved in the development of rice varieties tolerant of FTS and FDS. Therefore, the integration of breeding with advanced genome sequencing and omics technologies allows for the fine-tuning of tolerant genotypes on the basis of molecular genetics, and the further identification of novel genes and transporters that are related to Fe regulation from FTS and FDS conditions is incredibly important to achieve further success in this aspect.

show abstract

“…The root is the first organ to sense excess Fe, and Fe toxicity plays a direct role in the modulation of root system architecture (Li et al ., ; Onaga et al ., ). A rapid response of root tips to their changing surroundings is crucial if root development is to proceed under adverse soil conditions.…”

Section: Introductionmentioning

confidence: 97%

Excess iron stress reduces root tip zone growth through nitric oxide‐mediated repression of potassium homeostasis in Arabidopsis

Zhang

Wang

et al. 2018

New Phytologist

Self Cite

View full text Add to dashboard Cite

The root tip zone is regarded as the principal action site for iron (Fe) toxicity and is more sensitive than other root zones, but the mechanism underpinning this remains largely unknown. We explored the mechanism underpinning the higher sensitivity at the Arabidopsis root tip and elucidated the role of nitric oxide (NO) using NO-related mutants and pharmacological methods. Higher Fe sensitivity of the root tip is associated with reduced potassium (K ) retention. NO in root tips is increased significantly above levels elsewhere in the root and is involved in the arrest of primary root tip zone growth under excess Fe, at least in part related to NO-induced K loss via SNO1 (sensitive to nitric oxide 1)/SOS4 (salt overly sensitive 4) and reduced root tip zone cell viability. Moreover, ethylene can antagonize excess Fe-inhibited root growth and K efflux, in part by the control of root tip NO levels. We conclude that excess Fe attenuates root growth by effecting an increase in root tip zone NO, and that this attenuation is related to NO-mediated alterations in K homeostasis, partly via SNO1/SOS4.

show abstract

The Response of the Root Apex in Plant Adaptation to Iron Heterogeneity in Soil

Cited by 24 publications

References 108 publications

Soil carbonate drives local adaptation in Arabidopsis thaliana

Soil carbonate drives local adaptation in Arabidopsis thaliana

Tolerance of Iron-Deficient and -Toxic Soil Conditions in Rice

Excess iron stress reduces root tip zone growth through nitric oxide‐mediated repression of potassium homeostasis in Arabidopsis

Contact Info

Product

Resources

About