Changes in physiological responses and MTP (metal tolerance protein) transcripts in soybean (Glycine max) exposed to differential iron availability

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Members of MTP (metal tolerance protein) family are potential metal ion transporters, but little is known about how their responses and expression are altered in response to the deficiency and excess of Fe in soybean. In this study, root and shoot length and biomass in addition to leaf chlorophyll score, PSII efficiency and photosynthetic performance index were adversely affected by Fe-deficiency and excess Fe. Fe and S concentrations in the root and shoot, as well as the increased root FCR activity, consistently decreased and increased, respectively, accompanied by elevated Zn levels under Fe deficiency and Fe toxicity. This implies that Fe-uptake of plants subjected to differential Fe availability are likely determined by S and Zn nutritional status. In qPCR analysis, GmMTP5, GmMTP7, GmMTP8, and GmMTP10 genes showed downregulation under Fe shortage, whereas GmMTP6 and GmMTP11 were significantly upregulated due to Fe-toxicity. Further, GmMTP1, GmMTP3, GmMTP6, GmMTP7, and GmMTP10 were significantly induced in response to Fe toxicity, indicating their potential role in metal tolerance. Bioinformatics analysis showed that soybean MTP genes possessed a close relationship with certain Arabidopsis genes (i.e. ZAT, MTPB1) involved in solute transport and metal sequestration. Furthermore, top five motifs of soybean MTP protein correspond to the cation efflux family exhibited strong amino acid and evolutionary similarities with Arabidopsisthaliana. These findings shed light on Fe homeostasis mechanisms in soybean and could be used to regulate Fe uptake through breeding or transgenic manipulations of MTP genes.

Medienart:

E-Artikel

Erscheinungsjahr:

2022

Erschienen:

2022

Enthalten in:

Zur Gesamtaufnahme - volume:179

Enthalten in:

Plant physiology and biochemistry : PPB - 179(2022) vom: 15. Mai, Seite 1-9

Sprache:

Englisch

Beteiligte Personen:

Haque, A F M Mohabubul [VerfasserIn]
Rahman, Md Atikur [VerfasserIn]
Das, Urmi [VerfasserIn]
Rahman, Md Mostafizur [VerfasserIn]
Elseehy, Mona M [VerfasserIn]
El-Shehawi, Ahmed M [VerfasserIn]
Parvez, Md Sarwar [VerfasserIn]
Kabir, Ahmad Humayan [VerfasserIn]

Links:

Volltext

Themen:

Cation efflux family
E1UOL152H7
Fe homeostasis
Iron
Journal Article
Phylogenetic relationship
Soybean
Transcript

Anmerkungen:

Date Completed 05.04.2022

Date Revised 13.12.2023

published: Print-Electronic

Citation Status MEDLINE

doi:

10.1016/j.plaphy.2022.03.007

funding:

Förderinstitution / Projekttitel:

PPN (Katalog-ID):

NLM338340521