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- W2912431073 abstract "Foxtail millet (FM) [Setaria italica (L.) Beauv.] is a grain and forage crop well adaptedto nutrient-poor soils. To date little is known how FM adapts to low nitrogen (LN) atthe morphological, physiological, and molecular levels. Using the FM variety Yugu1,we found that LN led to lower chlorophyll contents and N concentrations, and higherroot/shoot and C/N ratios and N utilization efficiencies under hydroponic culture.Importantly, enhanced biomass accumulation in the root under LN was in contrast toa smaller root system, as indicated by significant decreases in total root length; crownroot number and length; and lateral root number, length, and density. Enhanced carbonallocation toward the root was rather for significant increases in average diameter ofthe LN root, potentially favorable for wider xylem vessels or other anatomical alterationsfacilitating nutrient transport. Lower levels of IAA and CKs were consistent with a smallerroot system and higher levels of GA may promote root thickening under LN. Further,up-regulation of SiNRT1.1, SiNRT2.1, and SiNAR2.1 expression and nitrate influx in theroot and that of SiNRT1.11 and SiNRT1.12 expression in the shoot probably favorednitrate uptake and remobilization as a whole. Lastly, more soluble proteins accumulatedin the N-deficient root likely as a result of increases of N utilization efficiencies.Such “excessive” protein-N was possibly available for shoot delivery. Thus, FM maypreferentially transport carbon toward the root facilitating root thickening/nutrienttransport and allocate N toward the shoot maximizing photosynthesis/carbon fixationas a primary adaptive strategy to N limitation." @default.
- W2912431073 created "2019-02-21" @default.
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- W2912431073 date "2018-01-01" @default.
- W2912431073 modified "2023-09-23" @default.
- W2912431073 title "Foxtail Millet[Setaria italica (L.) Beauv.] Grownunder low nitrogen shows a smallerroot system, enhanced biomassaccumulation, and nitrate transporterexpression" @default.
- W2912431073 hasPublicationYear "2018" @default.
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