Specific recognition of mugineic acid-ferric complex by barley roots

Feng, Jian; Kusano, Genjiro; Kimura, Syojiro; Nomoto, Kyosuke

doi:10.1016/0031-9422(93)85323-j

Cited by 60 publications

(35 citation statements)

References 11 publications

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“…In barley, uptake rates of PS-complexed Cu are 10-fold lower than those of the PS-Fe complex (Ma et al, 1993), suggesting that the PS system functions primarily for Fe transport. This preferential recognition of Fe-PS complexes remains to be examined for H. europaeus.…”

Section: mentioning

confidence: 98%

Copper‐deficiency‐induced phytosiderophore release in in the calcicole grass Hordelymus europaeus

1998

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Phytosiderophore (PS) release occurs under both iron and zinc deficiencies in representative Poaceae and has been speculated to be a general adaptive response to enhance the acquisition of micronutrient metals. We tested this hypothesis within an on-going study of the role of micronutrient metal nutrition for patterns of spontaneous vegetation in relation to soil pH and carbonate content. Hordelymus europaeus (L.) Harz, a negative grass species commonly found on soils rich in CaCO $ in Western Central Europe, was subjected to deficiencies of Fe, Zn, Mn and Cu using chelator-buffered nutrient solutions. PS release rates were determined at 3-5 d intervals during onset and development of deficiency symptoms. Plant dry matter yields and nutrient concentrations, measured at three time points were used to construct growth curves for calculation of PS release per unit root mass. In comparison with trace metal-sufficient control plants, dry matter production was markedly reduced in the Fe, Zn, Mn and Cudeficiency treatments, with final relative yields of 6, 11, 15 and 31 %, respectively. The phytosiderophore produced under Fe-and Cu-deficiency treatments was identified, using HPLC, as desoxymugineic acid. The highest rate of PS release (18 µmol g −" root d. wt in 2 h) was measured in the Fe-deficiency treatment, and there was substantial release in the Cu-deficiency treatment (7n25 µmol g −" root d. wt in 2 h). No PS release above control levels (2n6 µmol g −" root d. wt in 2 h) was observed in the Zn-or Mn-deficiency treatments (1n5 and 2n6 µmol g −" root d. wt in 2 h, respectively). It remains to be clarified whether PS release in response to Cu deficiency is a primary reaction to the deficiency, or is caused by a chain of events similar to that observed in Zndeficient wheat, which involves internal Fe deficiency. Our results suggest that PS release in the native plant species H. europaeus is a specific response to Fe and Cu deficiency and is not significantly induced in response to deficiencies of Zn and Mn. Induction of the PS mechanism in different plant species might be more diverse than previously thought.

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Section: mentioning

confidence: 98%

Copper‐deficiency‐induced phytosiderophore release in in the calcicole grass Hordelymus europaeus

1998

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“…Wheat plants (Triticum aestivum L. cv Minori) were cultured hydroponically as previously reported (Ma and Nomoto, 1993). Briefly, 80 selected seedlings (7 d old) were transplanted into 3-L Wagner pots with continuously aerated nutrient solution in an environmental chamber.…”

Section: Plant Culture and Feedingmentioning

confidence: 99%

“…Isolation of 2'-deoxymugineic acid was performed as previously reported (Ma and Nomoto, 1993). Briefly, root washings were collected the following day by soaking the roots in distilled water (3 L x 3) from 3 to 5 h after the onset of the light period.…”

Section: Lsolation and Purificationmentioning

confidence: 99%

“…Until now, six of these compounds from different gramineous plants have been identified (Nomoto et al, 1987). In our previous report, two related biosynthetic pathways for these mugineic acids were described on the basis of feeding with 'H-and 13C-labeled compounds (Ma and Nomoto, 1993). These pathways differ after 2'-deoxymugineic acid formation and are dependent on the plant species.…”

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confidence: 99%

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Incorporation of Label from 13C-, 2H-, and 15N-Labeled Methionine Molecules during the Biosynthesis of 2[prime]-Deoxymugineic Acid in Roots of Wheat

Feng

Nomoto

1994

Plant Physiol.

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“…Romheld and Marschner (1986) reported that the rate of Fe uptake in barley plants grown under Fe-deficient conditions from PS-Fe3+ is 100-1,000 times higher than the rate from EDTA-Fe3+ or microbial siderophore (ferrioxamine B). Ma et al (1993) also reported that the absorption rate of PS-Fe3+ roots was higher than that of EDTA-Fe3+ in Fe-deficient barley plants.…”

Section: Resultsmentioning

confidence: 92%

Concentrations of iron and phytosiderophores in xylem sap of iron-deficient barley plants

Kawai

Kamei

Matsuda

et al. 2001

Soil Science and Plant Nutrition

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Specific recognition of mugineic acid-ferric complex by barley roots

Cited by 60 publications

References 11 publications

Copper‐deficiency‐induced phytosiderophore release in in the calcicole grass Hordelymus europaeus

Copper‐deficiency‐induced phytosiderophore release in in the calcicole grass Hordelymus europaeus

Incorporation of Label from 13C-, 2H-, and 15N-Labeled Methionine Molecules during the Biosynthesis of 2[prime]-Deoxymugineic Acid in Roots of Wheat

Concentrations of iron and phytosiderophores in xylem sap of iron-deficient barley plants

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