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Forde, Brian G.; Lorenzo, Helena Carvalho De

doi:10.1023/a:1010329902165

Cited by 436 publications

(79 citation statements)

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“…We predict that FER may be involved in iron sensing in the lateral root tip. For example, FER may be one of several regulators that can fuel into the root-hair developmental program, because roothair formation is highly sensitive to a range of environmental factors (29,30). Root-hair proliferation is not fully restored in the transgenic overexpressing fer plants.…”

Section: Discussionmentioning

confidence: 99%

The tomato fer gene encoding a bHLH protein controls iron-uptake responses in roots

Ling

Bauer²,

Bereczky³

et al. 2002

Proc. Natl. Acad. Sci. U.S.A.

363

334

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Iron deficiency is among the most common nutritional disorders in plants. To cope with low iron supply, plants with the exception of the Gramineae increase the solubility and uptake of iron by inducing physiological and developmental alterations including iron reduction, soil acidification, Fe(II) transport and root-hair proliferation (strategy I). The chlorotic tomato fer mutant fails to activate the strategy I. It was shown previously that the fer gene is required in the root. Here, we show that fer plants exhibit root developmental phenotypes after low and sufficient iron nutrition indicating that FER acts irrespective of iron supply. Mutant fer roots displayed lower Leirt1 expression than wild-type roots. We isolated the fer gene by map-based cloning and demonstrate that it encodes a protein containing a basic helix-loop-helix domain. fer is expressed in a cell-specific pattern at the root tip independently from iron supply. Our results suggest that FER may control root physiology and development at a transcriptional level in response to iron supply and thus may be the first identified regulator for iron nutrition in plants.

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Section: Discussionmentioning

confidence: 99%

The tomato fer gene encoding a bHLH protein controls iron-uptake responses in roots

Ling

Bauer²,

Bereczky³

et al. 2002

Proc. Natl. Acad. Sci. U.S.A.

363

334

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“…It is well known that the availability and balance of nutrients, particularly nitrate, phosphate and potassium, affects the root system development and architecture by modulating growth rate and morphology of primary roots (PR), lateral roots (LR) and root hairs. 4,[9][10][11][12][13] For example, low NO 3 ¡ availability conditionally stimulates 10 or represses LR elongation, 4,13 whereas K C deficiency causes shortening of primary root (PR) as well as total root length.…”

Section: Introductionmentioning

confidence: 99%

The Arabidopsis nitrate transporter NPF7.3/NRT1.5 is involved in lateral root development under potassium deprivation

Zheng

Drechsler

Rausch

et al. 2016

Plant Signaling & Behavior

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“…Besides root architecture, physiological activities in roots including nutrient uptake, assimilation and xylem loading [43][44][45][46], release of phytohormones to the shoot [47][48][49][50][51] as well as root storage functions respond to heat and drought [52][53][54][55][56] (Figure 2C,F,G). Root hydraulic conductivity is another important parameter in this context [53].…”

Section: Root Morphology and Physiologymentioning

confidence: 99%

“…Possible mechanisms include the competition for phloem-borne carbon skeletons between root growth, nutrient uptake/assimilation and the loading into the xylem with an increased overall solute concentration and a decreased transport velocity. Nitrate uptake in maize is decreased during a drought period, but may increase again during a subsequent recovery phase [43]. Besides the activities of newly formed roots, older roots may recover to some extent after the stress period [43].…”

Section: Root Morphology and Physiologymentioning

confidence: 99%

“…Nitrate uptake in maize is decreased during a drought period, but may increase again during a subsequent recovery phase [43]. Besides the activities of newly formed roots, older roots may recover to some extent after the stress period [43]. Considerable differences in nitrogen use efficiency were detected in tomato plants subjected to drought indicating that this plasticity might be relevant for selecting or breeding genotypes which are less sensitive to soil drying [44].…”

Section: Root Morphology and Physiologymentioning

confidence: 99%

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Selection and Breeding of Suitable Crop Genotypes for Drought and Heat Periods in a Changing Climate: Which Morphological and Physiological Properties Should Be Considered?

2016

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Selection and breeding of genotypes with improved drought/heat tolerance become key issues in the course of global change with predicted increased frequency of droughts or heat waves. Several morphological and physiological plant traits must be considered. Rooting depth, root branching, nutrient acquisition, mycorrhization, nodulation in legumes and the release of nutrients, assimilates or phytohormones to the shoot are relevant in root systems. Xylem embolism and its repair after a drought, development of axillary buds and solute channeling via xylem (acropetal) and phloem (basipetal and acropetal) are key processes in the stem. The photosynthetically active biomass depends on leaf expansion and senescence. Cuticle thickness and properties, epicuticular waxes, stomatal regulation including responses to phytohormones, stomatal plugs and mesophyll resistance are involved in optimizing leaf water relations. Aquaporins, dehydrins, enzymes involved in the metabolism of compatible solutes (e.g., proline) and Rubisco activase are examples for proteins involved in heat or drought susceptibility. Assimilate redistribution from leaves to maturing fruits via the phloem influences yield quantity and quality. Proteomic analyses allow a deeper insight into the network of stress responses and may serve as a basis to identify suitable genotypes, although improved stress tolerance will have its price (often lowered productivity under optimal conditions).

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Cited by 436 publications

References 0 publications

The tomato fer gene encoding a bHLH protein controls iron-uptake responses in roots

The tomato fer gene encoding a bHLH protein controls iron-uptake responses in roots

The Arabidopsis nitrate transporter NPF7.3/NRT1.5 is involved in lateral root development under potassium deprivation

Selection and Breeding of Suitable Crop Genotypes for Drought and Heat Periods in a Changing Climate: Which Morphological and Physiological Properties Should Be Considered?

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