Genome-wide identifiication of QTLs associated with iron defiiciency tolerance in soybean reveals GATA12 as the integrator of iron signaling in roots
Küçük Resim Yok
Tarih
2023
Dergi Başlığı
Dergi ISSN
Cilt Başlığı
Yayıncı
Tubitak Scientific & Technological Research Council Turkey
Erişim Hakkı
info:eu-repo/semantics/openAccess
Özet
Iron (Fe) is an essential micronutrient required for plant growth and development. However, its deficiency causes substantial yield losses, particularly in alkaline soils. Soybean (Glycine max) serves as an ideal model to study Fe deficiency chlorosis (IDC) due to its inefficient Fe uptake from the soil. Although the quantitative trait loci (QTL) associated with IDC tolerance were determined in soybean, the specific genes within these QTL regions remain unidentified. In this study, it was aimed to identify and analyze the expres-sion levels of genes present in IDC-responsive soybean QTL under Fe deficiency. Through this investigation, 6593 genes were identified within 19 QTL linked to IDC tolerance in soybean, and among these, 607 genes exhibited differential expression under Fe deficiency conditions. Notably, the orthologs of 10 selected genes, referred to as the core group, were found to be induced in Fe-signaling mutants of Arabidopsis thaliana. These core group genes were enriched in metal transport and Fe-signaling pathways. Further examination of these genes in an IDC-sensitive soybean cultivar revealed their induction under Fe deficiency and high soil pH conditions. Particularly, GATA TRANSCRIPTION FACTOR12 (GATA12) stood out with significantly increased expression levels of approximately 5 and 20 times under Fe deficiency and high pH treatments, respectively. Coexpression network analyses of the core group genes highlighted the significance of the cluster containing GATA12 as a crucial integrator of Fe signaling between the epidermis-localized FER-LIKE IRON DEFICIENCY INDUCED TRANSCRIPTION FACTOR (FIT) and the stele-localized POPEYE (PYE) signaling networks. Overall, the findings suggest that GATA12 and its close paralogs may act in the transcriptional network linking the two Fe-signaling networks in the root stele and epidermis. This knowledge sheds light on the intricate mechanisms of Fe signaling in soybean and provides valuable insights for future studies on IDC tolerance and Fe-efficient cultivar development.
Açıklama
Anahtar Kelimeler
Arabidopsis, gene expression, iron deficiency, molecular networks, QTL, soybean
Kaynak
Turkish Journal of Botany
WoS Q Değeri
Q3
Scopus Q Değeri
Q2
Cilt
47
Sayı
6
