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Titolo:
Phytosiderophore release in Aegilops tauschii and Triticum species under zinc and iron deficiencies
Autore:
Tolay, I; Erenoglu, B; Romheld, V; Braun, HJ; Cakmak, I;
Indirizzi:
Sabanci Univ, Fac Engn & Nat Sci, TR-81474 Istanbul, Turkey Sabanci Univ Istanbul Turkey TR-81474 Nat Sci, TR-81474 Istanbul, Turkey Cukurova Univ, Dept Soil Sci & Plant Nutr, TR-01330 Adana, Turkey CukurovaUniv Adana Turkey TR-01330 & Plant Nutr, TR-01330 Adana, Turkey Univ Hohenheim, Inst Pflanzenernahrung 330, D-70593 Stuttgart, Germany Univ Hohenheim Stuttgart Germany D-70593 330, D-70593 Stuttgart, Germany CIMMYT, TR-06511 Ankara, Turkey CIMMYT Ankara Turkey TR-06511CIMMYT, TR-06511 Ankara, Turkey
Titolo Testata:
JOURNAL OF EXPERIMENTAL BOTANY
fascicolo: 358, volume: 52, anno: 2001,
pagine: 1093 - 1099
SICI:
0022-0957(200105)52:358<1093:PRIATA>2.0.ZU;2-S
Fonte:
ISI
Lingua:
ENG
Soggetto:
WHEAT GENOTYPES; HEXAPLOID WHEATS; BREAD WHEAT; EFFICIENCY; TOLERANCE; PLANTS; MOBILIZATION; AESTIVUM; SORGHUM; CORN;
Keywords:
Aegilops tauschii; iron deficiency; phytosiderophores; Triticum monococcum; Triticum dicoccum; Triticum aestivum; zinc deficiency;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Agriculture,Biology & Environmental Sciences
Life Sciences
Citazioni:
35
Recensione:
Indirizzi per estratti:
Indirizzo: Cakmak, I Sabanci Univ, Fac Engn & Nat Sci, TR-81474 Istanbul, Turkey Sabanci Univ Istanbul Turkey TR-81474 R-81474 Istanbul, Turkey
Citazione:
I. Tolay et al., "Phytosiderophore release in Aegilops tauschii and Triticum species under zinc and iron deficiencies", J EXP BOT, 52(358), 2001, pp. 1093-1099

Abstract

Using three diploid (Triticum monococcum, AA), three tetraploid (Triticum turgidum, BBAA), two hexaploid (Triticum aestivum and Triticum compactum, BBAADD) wheats and two Aegilops tauschii (DD) genotypes, experiments were carried out under controlled environmental conditions in nutrient solution (i) to study the relationships between the rates of phytosiderophore (PS) release from the roots and the tolerance of diploid, tetraploid, and hexaploidwheats and Ae. tauschii to zinc (Zn) and iron (Fe) deficiencies, and (ii) to assess the role of different genomes in PS release from roots under different regimes of Zn and Fe supply. Phytosiderophores released from roots were determined both by measurement of Cu mobilized from a Cu-loaded resin and identification by using HPLC analysis. Compared to tetraploid wheats, diploid and hexaploid wheats were less affected by Zn deficiency as judged from the severity of leaf symptoms. Aegilops tauschii showed very slight Zn deficiency symptoms possibly due to its slower growth rate. Under Fe-deficient conditions, all wheat genotypes used were similarly chlorotic; however, development of chlorosis was first observed in tetraploid wheats. Correlation between PS release rate determined by Cu-mobilization test and HPLC analysis was highly significant. According to HPLC analysis, all genotypes of Triticum and Ae. tauschii species released only one PS, 2 ' -deoxymugineic acid, both under Fe and Zn deficiency. Under Zn deficiency, rates of PS release in tetraploid wheats averaged 1 mu mol (30 plants)(-1) (3 h)(-1), while in hexaploid wheats rate of PS release was around 14 mu mol (30 plants)(-1)(3 h)(-1). Diploid wheats and Ae. tauschii accessions behaved similarly intheir capacity to release PS and intermediate between tetraploid and hexaploid wheats regarding the PS release capacity. All Triticum and Aegilops species released more PS under Fe than Zn deficiency, particularly when the rate of PS release was expressed per unit dry weight of roots. On average, the rates of PS release under Fe deficiency were 3.0, 5.7, 8.4, and 16 mu mol (30 plants)(-1) (3 h)(-1) for Ae. tauschii, diploid, tetraploid and hexaploid wheats, respectively, The results of the present study show that the PS release mechanism in wheat is expressed effectively when three genomes, A, B and D, come together, indicating complementary action of the corresponding genes from A, B and D genomes to activate biosynthesis and release of PS.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 20/09/20 alle ore 06:47:24