Metal micronutrients in xylem sap of iron-deficient barley as affected by plant-borne, microbial, and synthetic metal chelators

Alam, Shah; Kamei, Shigeru; Kawai, Soshi

doi:10.1080/00380768.2001.10408377

Cited by 17 publications

(13 citation statements)

References 34 publications

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“…The flow rate of the xylem sap in the Fe-deficient plants was 2A-fold lower than that of the Fe-sufficient plants (25±3.0 vs. 60±3.5 mg plant-1 h-1 ). This decrease in the amount of xylem sap in the Fe-deficient plants is in agreement with previously reported results(Alam et al 2001a). Mineral composition.…”

supporting

confidence: 93%

“…Minorimugi) seeds and transplantation of seedlings in buckets were the same as those previously described (Alam et al 2001a). Plants were grown in 1/2-strength modified Hoagland-Arnon nutrient solutions with sufficient (10.0,uM) and deficient (O,uM) levels of Fe (Kawai et al 1993) at pH 5.5 under greenhouse conditions (average daylnight temperature about 25/YC) in the spring season for 14 d.…”

Section: Methodsmentioning

confidence: 99%

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Effect of iron deficiency on the chemical composition of the xylem sap of barley

Alam

Kamei

Kawai

2001

Soil Science and Plant Nutrition

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supporting

confidence: 93%

Section: Methodsmentioning

confidence: 99%

Effect of iron deficiency on the chemical composition of the xylem sap of barley

Alam

Kamei

Kawai

2001

Soil Science and Plant Nutrition

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“…Following root absorption, Zn and Fe are transported into the shoot through xylem vessels either as free ions or chelated to low molecular-weight organic compounds. Similar to root uptake, root-to-shoot transport of Zn and Fe could be as well facilitated by N, either by affecting the levels of proteins contributing to xylem loading or chelation of Zn in the xylem by nitrogenous compounds for xylem transport by nicotianamine and mugineic acid family phytosiderophores (Mori et al 1991;Alam et al 2001;Curie et al 2009). Methionine, a sulfur-containing proteinogenic amino acid, is a critical precursor in the biosynthesis of nicotianamine and mugineic acid family phytosiderophores (Mori and Nishizawa 1987).…”

Section: Role Of Nitrogen On Uptake and Transport Of Zinc And Ironmentioning

confidence: 99%

REVIEW: Biofortification of Durum Wheat with Zinc and Iron

2010

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Micronutrient malnutrition affects over 2 billion people in the developing world. Iron (Fe) deficiency alone affects >47% of all preschool aged children globally, often leading to impaired physical growth, mental development, and learning capacity. Zinc (Zn) deficiency, like iron, is thought to affect billions of people, hampering growth and development, and destroying immune systems. In many micronutrient‐deficient regions, wheat is the dominant staple food making up >50% of the diet. Biofortification, or harnessing the powers of plant breeding to improve the nutritional quality of foods, is a new approach being used to improve the nutrient content of a variety of staple crops. Durum wheat in particular has been quite responsive to breeding for nutritional quality by making full use of the genetic diversity of Fe and Zn concentrations in wild and synthetic parents. Micronutrient concentration and genetic diversity has been well explored under the HarvestPlus biofortification research program, and very positive associations have been confirmed between grain concentrations of protein, Zn, and Fe. Yet some work remains to adequately explain genetic control and molecular mechanisms affecting the accumulation of Zn and Fe in grain. Further, evidence suggests that nitrogen (N) nutritional status of plants can have a positive impact on root uptake and the deposition of micronutrients in seed. Extensive research has been completed on the role of Zn fertilizers in increasing the Zn density of grain, suggesting that where fertilizers are available, making full use of Zn fertilizers can provide an immediate and effective option to increase grain Zn concentration, and productivity in particular, under soil conditions with severe Zn deficiency.

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“…In addition, iron deficiency in tomato (Lycopersicon esculentum Mill., Pich et al 1994), soybean (Glycine max Merr., Brown and Tiffin 1965), and fava bean (Vicia faba L., Nikolic and Römheld 1999) caused the increase of citrate concentrations in xylem saps. Phytosiderophores, which may bind to iron, were present in the xylem sap of barley (Hordeum vulgare L., Alam et al 2001) and rice (Oryza sativa L., Ando et al 2013). Ishimaru et al (2006) reported that 59 Fe-DMA added to the culture medium was absorbed by rice plants and transported to the shoots, probably in the form of 59 Fe-DMA via the xylem.…”

Section: Introductionmentioning

confidence: 99%

Chemical forms of iron in xylem sap from graminaceous and non-graminaceous plants

Ariga

Hazama

Yanagisawa

et al. 2014

Soil Science and Plant Nutrition

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Graminaceous plants can take up iron-phytosiderophore complexes, whereas non-graminaceous plants absorb ferrous ions after the reduction of ferric compounds at the root cell membranes. The iron (Fe) in the roots may be transported to the aerial plant parts through the xylem. We compared the chemical forms in xylem sap collected from the cut stems of three graminaceous .]) grown in composite soils for the concentrations of iron and iron-chelating compounds (nicotianamine, phytosiderophores, citrate). We also fractionated the xylem saps by size-exclusion chromatography to gain insight into the chemical forms of iron. The Fe concentrations in the xylem sap ranged from 9 to 40 μM. Nicotianamine was found in the xylem sap from all the plants examined, with higher concentrations in the non-graminaceous plants. In contrast, phytosiderophores (2'-deoxymugineic acid and mugineic acid) were predominantly detected in the graminaceous plants. The concentrations of free citrate varied greatly (from 4 to 2200 μM) among the six plant species. The xylem sap iron in non-graminaceous plants may form two types of Fe-citrate, whereas in graminaceous plants, the bound Fe forms may be largely two types of Fe-citrate with various Fe-phytosiderophores.

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Metal micronutrients in xylem sap of iron-deficient barley as affected by plant-borne, microbial, and synthetic metal chelators

Cited by 17 publications

References 34 publications

Effect of iron deficiency on the chemical composition of the xylem sap of barley

Effect of iron deficiency on the chemical composition of the xylem sap of barley

REVIEW: Biofortification of Durum Wheat with Zinc and Iron

Chemical forms of iron in xylem sap from graminaceous and non-graminaceous plants

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