The ratio of phytosiderophores nicotianamine to deoxymugenic acid controls metal homeostasis in rice.
Metal homeostasis
NA:DMA ratio
Oryza sativa L.
Phytosiderophores
Transcriptome
Journal
Planta
ISSN: 1432-2048
Titre abrégé: Planta
Pays: Germany
ID NLM: 1250576
Informations de publication
Date de publication:
Oct 2019
Oct 2019
Historique:
received:
14
03
2019
accepted:
01
07
2019
pubmed:
7
7
2019
medline:
18
12
2019
entrez:
7
7
2019
Statut:
ppublish
Résumé
The ratio of nicotianamine to deoxymugenic acid controls tissue-specific metal homeostasis in rice and regulates metal delivery to the endosperm. The metal-chelating phytosiderophores nicotianamine (NA) and 2'deoxymugenic acid (DMA) are significant factors for the control of metal homeostasis in graminaceous plants. These compounds are thought to influence metal homeostasis, but their individual roles and the effect of altering the NA:DMA ratio are unknown. We purposely generated rice lines with high and low NA:DMA ratios (HND and LND lines, respectively). The HND lines accumulated more iron (Fe), zinc (Zn), manganese (Mn) and copper (Cu) in the endosperm through the mobilization of Fe, Zn and Mn from the seed husk to the endosperm. In contrast, Fe, Zn and Mn were mobilized to the husk in the LND lines, whereas Cu accumulated in the endosperm. Different groups of metals are, therefore, taken up, transported and sequestered in vegetative tissues in the HND and LND lines to achieve this metal distribution pattern in the seeds. We found that different sets of endogenous metal homeostasis genes were modulated in the HND and LND lines to achieve differences in metal homeostasis. Our findings demonstrate that the NA:DMA ratio is a key factor regulating metal homeostasis in graminaceous plants. These findings can help formulate refined strategies to improve nutrient composition and nutrient use efficiency in crop plants.
Identifiants
pubmed: 31278466
doi: 10.1007/s00425-019-03230-2
pii: 10.1007/s00425-019-03230-2
doi:
Substances chimiques
Metals
0
Siderophores
0
nicotianamine
34441-14-0
Manganese
42Z2K6ZL8P
Azetidinecarboxylic Acid
5GZ3E0L9ZU
2'-deoxymugineic acid
74235-24-8
Iron
E1UOL152H7
Zinc
J41CSQ7QDS
Types de publication
Journal Article
Langues
eng
Sous-ensembles de citation
IM
Pagination
1339-1354Références
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