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E u r o S c i C o n J o i n t E v e n t s o n
Plant Science, Tissue Engineering
and Parasitology
December 03-04 , 2018
Amsterdam, Nether l ands
International Journal of Applied Science - Research and Review
ISSN: 2394-9988
Plant Science | Tissue Engineering | Parasitology 2018
Biography
Zeeshan Ahmad is a PhD Scholar under CSC Scholarship in
The Key Laboratory of Plant-Soil Interactions, MOE; Department
of Plant Nutrition, China Agricultural University, Beijing, China.
His primary research work is on foxtail millet (Setaria italica L.).
How it responds to nutrient limitations especially Nitrogen and
Phosphorus. He has published two papers in Frontiers in Plant
science. He is also researching maize (mutant lines) response
to LP at vegetative stage under hydroponic conditions. He has
also published one paper
in Pakistan Journal of Agricultural
Sciences
while working with rice (
Oryza sativa L
. response to
Potassium. Xuexian Li is his supervisor during his PhD research.
zeeshanahmad635@yahoo.comF
oxtail millet is being studied as a model crop for cereals owing to its
adaptability to nutrient-poor soils. We previously found a smaller root system
with an enlarged root diameter in foxtail millet that facilitates nutrient transport
under nitrogen limitation. How foxtail millet responds to phosphate limitation
(LP) remains unaddressed. In this study, LP seedlings of the sequenced variety
Yugu1 were grown under hydroponic culture. LP plants had significantly lower
P concentrations and displayed higher levels of anthocyanin accumulation in
leaves. A more extensive root system was developed primarily via stimulation
of lateral root proliferation regarding the number, density, and length in foxtail
millet under P limitations. Preferential biomass accumulation in the root under
LP ensured carbon provision for root expansion and resulted in significant
increases in the total and specific root length, which substantially extended the
absorptive surface of P in the growthmedium. Elevation of auxin and gibberellin
concentrations might serve as an internal boost supporting root architectural
re-patterning under LP. Not a just morphological adaptation, up-regulation of
expression of
SiPHT1
;1 and
SiPHT1
;4 in roots and that of
SiPHT1
;2 in roots and
shoots preconditioned adaptive enhancement of P uptake and translocation
under LP. By a more extensive root system of LP plants, internal nitrogen
surpluses occurred as indicated by higher concentrations of nitrogen in roots
and dramatic increases in free amino acids in shoots and roots. Such nitrogen
surplus ‘signals’ tended to switch down expression of nitrate transporters
SiNRT2
.1 and
SiNAR2
.1 in the root and that of
SiNRT1
.11 and
SiNRT1
.12 in the
shoot to reduce nitrate mobilization towards or within the shoot. Together, our
work provided new insights into the adaption of a critical cereal crop to LP and
its innate connections with nitrogen.
Zeeshan Ahmad
1
, Faisal Nadeem and Xuexian Li
1
MOE Key Laboratory of Plant-Soil Interactions-China Agricultural University, China
Zeeshan Ahmad et al., Int J Appl Sci Res Rev 2018, Volume: 5
DOI: 10.21767/2394-9988-C2-006
Phosphorus limitation enlarges the root
system along with contrasting expressions of
phosphate and nitrate transporters in foxtail
millet (
Setaria italica L.
)