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PHOSPHORUS UPTAKE EFFICIENCY IN WHEAT SPECIES UNDER LOW PHOSPHORUS AND ELEVATED CO2

KrishiKosh

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Title PHOSPHORUS UPTAKE EFFICIENCY IN WHEAT SPECIES UNDER LOW PHOSPHORUS AND ELEVATED CO2
M Sc
 
Creator KRISHNA KANT DUBEY
 
Contributor Renu Pandey
 
Subject inorganic compounds, wheats, planting, vegetative propagation, concentrates, cereals, drying, nutrients, biological development, bakery products
 
Description T-8325
Experiments were conducted to study the response of three wheat species,
bread wheat (Triticum aestivum), durum (Triticum durum) and rye (Secale cereale) to
the interaction between the two P levels (0 and 500 µM) and two CO2 concentrations
(380 and 700 µmol mol-1
) in terms of alteration at morpho-physiological and
biochemical level. Results revealed that root, shoot and total dry matter accumulation
and partitioning were affected by CO2 enrichment and P level. Doubling of CO2 had
largest positive effect on total dry matter accumulation under sufficient P supply. It
was noticed that eCO2 led to 26%, 27% and 14% increase in shoot dry matter
accumulation in bread wheat, durum and rye, respectively as compared to aCO2 plants
grown with P. The maximum increase in total leaf area was observed in rye (71.0%)
followed by bread wheat (59.3%) under eCO2 +P over aCO2 +P treatment. Increase in
SLW was maximum in bread wheat (69.6%) when raised at eCO2 as compared to
aCO2. Higher number of primary roots irrespective of P treatment was observed in rye
at eCO2, but when grown under aCO2, it produced 10.3% higher number of primary
roots with –P as compared to +P treatment. The increase in root length under eCO2
was 23.9% at aCO2 –P condition. Among the treatments, -P at eCO2 produced the
30
maximum root surface area (1.65 cm2
/plant) in comparison to –P aCO2 (1.26
cm2
/plant), but no significant difference was noticed at +P when grown under aCO2 or
eCO2. Rye was found to be highly responsive to CO2 enrichment as it registered a
20.6% increase in total chlorophyll and about 5.2 times in total carotenoid over aCO2
when grown without P. Maximum total sugar, starch and crude protein concentration
were found in bread wheat when grown at eCO2 +P compared to durum and rye.
Durum wheat recorded highest P concentration in root and shoot and the P utilization
efficiency was maximum in rye at eCO2 -P.
 
Date 2016-10-22T10:18:57Z
2016-10-22T10:18:57Z
2010
 
Type Thesis
 
Identifier http://krishikosh.egranth.ac.in/handle/1/81349
 
Format application/pdf
 
Publisher IARI, PLANT PATHOLOGY