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Author Zhang Y., Zhang Q., Guo M., Wang X., Li T., Wu Q., Li L., Yi K., Ruan W.
Title NIGT1 represses plant growth and mitigates phosphate starvation signaling to balance the growth response tradeoff in rice.
Abstract:
Inorganic phosphate (Pi) availability is an important factor which affects the growth and yield of crops, thus an appropriate and effective response to Pi fluctuation is critical. However, how crops orchestrate Pi signaling and growth under Pi starvation conditions to optimize the growth defense tradeoff remains unclear. Here we show that a Pi starvation-induced transcription factor NIGT1 (NITRATE-INDUCIBLE GARP-TYPE TRANSCRIPTIONAL REPRESSOR 1) controls plant growth and prevents a hyper-response to Pi starvation by directly repressing the expression of growth-related and Pi-signaling genes to achieve a balance between growth and response under a varying Pi environment. NIGT1 directly binds to the promoters of Pi starvation signaling marker genes, like IPS1, miR827, and SPX2, under Pi-deficient conditions to mitigate the Pi-starvation responsive (PSR). It also directly represses the expression of vacuolar Pi efflux transporter genes VPE1/2 to regulate plant Pi homeostasis. We further demonstrate that NIGT1 constrains shoot growth by repressing the expression of growth-related regulatory genes, including brassinolide signal transduction master regulator BZR1, cell division regulator CYCB1;1, and DNA replication regulator PSF3. Our findings reveal the function of NIGT1 in orchestrating plant growth and Pi starvation signaling, and also provide evidence that NIGT1 acts as a safeguard to avoid hyper-response during Pi starvation stress in rice.
Journal J Integr Plant Biol
Country China
Volume
Pages
Year 2023
PubMed ID 37096648
PubMed Central ID -
DOI 10.1111/jipb.13496
URL -
Relation
Gene BZR1 BZR2 CPD1 CYCB1;1 ERF50 ERF57 ERF58 FCO11 IAA14 IPS1 MGD2 NIGT1 PAP10A PHR2 PSF3 PT24 SPX2 SQD2.2 TIFY6B VPE2 miR827
INSD -
Strain Wild Core Collection -
Induced Mutation Lines(NIG Collection) -
Sterile Seed Strain -
Lethal Embryo
Mutantion Strain
-
Stages in Each Organ
- Muant Lines (Gene)
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Cultivated Varieties(NIG Collection) -
Stages in Each Organ -
/rice/oryzabase