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Interactive Effects of Phosphorus Nutrition and Elevated CO2 on Physiology and Growth of Mungbean (Vigna radiata (L.) Wilczek)

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Title Interactive Effects of Phosphorus Nutrition and Elevated CO2 on Physiology and Growth of Mungbean (Vigna radiata (L.) Wilczek)
M Sc
 
Creator SURENDRA KUMAR MEENA
 
Contributor Renu Pandey
 
Subject inorganic compounds, planting, vegetative propagation, biological development, concentrates, developmental stages, root nodulation, biological phenomena, drying, photosynthesis
 
Description T-8633
Enhanced level of CO2 increases overall growth of crop plants, especially in C3
species. This study was conducted to quantify the effect of elevated CO2 and
phosphorus (P) on growth and physiology associated with biomass accumulation
pattern at different growth stages in mungbean (Vigna radiata (L.) Wilczek). Seeds
were grown in pots with sufficient and low-P exposed to elevated (EC, 550 ± 50 μmol
mol-1) and ambient (AC, 384 μmol mol-1) CO2 in open top chamber (OTC). Biomass
accumulation and total leaf area increased under EC compared to AC in both
varieties. Maximum biomass accumulation was recorded at anthesis stage. Plants
responded to EC even under low-P by accumulating higher whole plant biomass
which was comparable to sufficient P grown plant under AC. Rate of photosynthesis
was significantly higher under EC with sufficient P. Root length, volume and surface
area increased significantly at low-P under EC. Nodule number, size (weight) and
nitrogenase activity were significantly higher under EC with sufficient P leading to
maximum tissue nitrogen concentration and uptake. Sugar and starch in leaf markedly
increased under EC and low-P in both varieties. P partitioning coefficient for leaf
under EC was higher compared to AC grown plants during anthesis. P x CO2
treatment increased number of pods per plant, 100-seed weight and seed yield while
number of seed per pod was not affected by [CO2]. Though the yield was more under
elevated CO2 in both varieties but the yield stability was more in PDM-139 as it
showed less reduction in yield under elevated CO2 and low-P compared to sufficient
P. These results indicate that higher CO2 can compensate for P requirement to some
extent which may be because of increased nutrient acquisition and utilization
efficiency.
 
Date 2016-09-20T18:09:09Z
2016-09-20T18:09:09Z
2012
 
Type Thesis
 
Identifier http://krishikosh.egranth.ac.in/handle/1/77822
 
Format application/pdf
 
Publisher IARI, DIVISION OF PLANT PHYSIOLOGY