A novel GLYCEROPHOSPHODIESTER PHOSPHODIESTERASE 13 is involved in the Phosphate starvation-induced lipid remodeling in rice
crossref(2024)
摘要
Phosphorus (P) is one of the most vital macronutrient determinants in plant development and productivity. However, the bioavailability of inorganic phosphate (Pi), the only form that plants can assimilate, is limited in the soil, thus significantly affecting plant development. Plants have adopted various specialized strategies to modify their morphological, physiological, and biochemical properties for better adaptation to Pi deficiency conditions. GLYCEROPHOSPHODIESTER PHOSPHODIESTERASES (GDPDs), generally known as phospholipid remodeling proteins, have been suggested to play essential roles in maintaining phosphate homeostasis. The previous genome-wide association studies (GWAS) in a Vietnamese rice collection led to the discovery of a robust QTL named qRST9.14 associating with the phosphate adaption in rice, in which OsGDPD13 is located within this locus. Interestingly, we discovered an absence of OsGDPD13 from the Indica reference genome. A subcellular localization study showed that the GDPD13 protein localizes to the plasma membrane, cytoplasmic speckles, and plasmodesmata. The osgdpd13 knockout mutant was generated in the Japonica cv Kitaake background to characterize its function. Phenotypic analysis indicated that mutation of OsGDPD13 significantly lowered crown root number and reduced the plant height under Pi deficient condition. Moreover, osgdpd13 lines reduce the capability to degrade total phospholipids compared to the wild type under Pi starvation conditions. This finding suggests the involvement of the OsGDPD13 gene in rice growth and the Phosphate starvation-induced lipid remodeling under P deficiency. This work will provide valuable information for developing crop plants with higher Phosphate use efficiency.
### Competing Interest Statement
The authors have declared no competing interest.
* CAREs
: Cis-acting regulatory elements
GLs
: Glycolipids
PLs
: Phospholipids
FA(ME)
: Fatty acid (methyl ester)
TLC
: Thin-layer chromatography
GC-MS
: Gas chromatography - Mass spectrometry
GDPD
: Glycerophosphodiester phosphodiesterase
GPC
: Glycerophosphocholine
GPE
: Glycerophosphoethanolamine
GPI
: Glycerophosphoinositol
GPG
: Glycerophosphoglycerol
PAH
: Phosphatidic acid phosphohydrolase
PE
: Phosphatidylethanolamine
PC
: Phosphatidylcholine
PG
: Phosphatidylglycerol
PI
: Phosphatidylinositol
MGDG
: Monogalactosyldiacylglycerol
DGDG
: Digalactosyldiacylglycerol
SQDG
: Sulfoquinovosyldiacylglycerol
PSRs
: Phosphate stress/starvation responses
PUE
: Pi utilization efficiency
Pi
: inorganic phosphorus
WT
: wild-type
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