Genotypic variation for phosphorus uptake dinitrogen fixation in cowpea on low-phosphorus soils of southern Cameroon

2006 ◽  
Vol 169 (6) ◽  
pp. 816-825 ◽  
Author(s):  
Martin Jemo ◽  
Robert C. Abaidoo ◽  
Christian Nolte ◽  
Walter J. Horst
Keyword(s):  
Genotypic Variation ◽  
Phosphorus Uptake ◽  
Dinitrogen Fixation ◽  
Low Phosphorus ◽  
Southern Cameroon

scholarly journals Knock out of the PHOSPHATE 2 Gene TaPHO2-A1 Improves Phosphorus Uptake and Grain Yield under Low Phosphorus Conditions in Common Wheat

2016 ◽  
Vol 6 (1) ◽  
Author(s):  
Xiang Ouyang ◽  
Xia Hong ◽  
Xueqiang Zhao ◽  
Wei Zhang ◽  
Xue He ◽  
...  
Keyword(s):  
Grain Yield ◽  
Common Wheat ◽  
Phosphorus Uptake ◽  
Knock Out ◽  
Low Phosphorus

scholarly journals Genetic variation for root architectural traits in response to phosphorus deficiency in mungbean at the seedling stage

2019 ◽  
Author(s):  
Venkata Ravi Prakash Reddy ◽  
M. Aski ◽  
G.P. Mishra ◽  
H.K. Dikshit ◽  
Akanksha Singh ◽  
...  
Keyword(s):  
Phosphorus Deficiency ◽  
Phosphorus Uptake ◽  
Root Traits ◽  
Seedling Stage ◽  
Phosphorus Efficiency ◽  
Root Tips ◽  
Uptake Efficiency ◽  
Highly Efficient ◽  
Low Phosphorus ◽  
Architectural Traits

AbstractRoots enable the plant to survive in natural environment by providing anchorage and acquisition of water and nutrients. In this study, 153 mungbean genotypes were studied to compare root architectural traits under normal and low phosphorus conditions. Significant variations, medium to high heritability, near normal distribution and significant correlations were observed for studied root traits. Total root length (TRL) was positively correlated with total surface area (TSA), total root volume (TRV), total root tips (TRT) and root forks. The first two principal components explained the 79.19 % and 78.84% of the total variation under normal and low phosphorus conditions. TRL, TSA and TRV were major contributors of variation and can be utilized for screening of phosphorus uptake efficiency at seedling stage. Released Indian mungbean varieties were found to be superior for root traits than other genotypic groups. Based on comprehensive phosphorus efficiency measurement, IPM-288, TM 96-25, TM 96-2, M 1477, PUSA 1342 were found to be best five highly efficient genotypes whereas M 1131, PS-16, Pusa Vishal, M 831, IC 325828 were highly inefficient genotypes. These identified highly efficient lines are valuable genetic resources for phosphorus uptake efficiency that could be used in mungbean breeding programme.

Biological phosphorus uptake in submerged biofilters with nitrogen removal

1994 ◽  
Vol 29 (10-11) ◽  
pp. 135-143 ◽  
Author(s):  
R. F. Gonçalves ◽  
L. Le Grand ◽  
F. Rogalla
Keyword(s):  
Phosphorus Removal ◽  
Phosphorus Uptake ◽  
Treatment Plant ◽  
Pilot Scale ◽  
Biological Phosphorus Removal ◽  
Low Phosphorus ◽  
Nitrification And Denitrification ◽  
Aerated Filter ◽  
Filter Bed ◽  
Biological Phosphorus

This paper introduces biological phosphorus removal (Bio-P) from wastewater on a submerged biofilter. Pilot scale research was carried out over a period of two years using a floating upflow aerated filter, originally designed for nitrification and denitrification of sewage. The factors which influence Bio-P on fixed film processes and the possible biofilter configurations which eliminate C, N and P are discussed. The procedures are applicable to all types of treatment plants using biofilters, both new and already in existence, making no distinction between the different processes available today, co-current and counter-current filters. Biological phosphorus removal can be associated to the different treatment levels required: organic matter removal; secondary nitrification secondary nitrification and denitrification. For the third option - complete nutrient removal, treatment is completed with a hydraulic retention time in the filter bed of under four hours. Because of the simultaneous filtration with effluent SS below 10 mg/l, low phosphorus residuals can be achieved by Bio-P alone. The modifications required for setting up this operating procedure on any treatment plant are presented.

Phosphorus Uptake from Soils by Corn Hybrids selected for High and Low Phosphorus Accumulation 1

1970 ◽  
Vol 62 (1) ◽  
pp. 103-106 ◽  
Author(s):  
Dale E. Baker ◽  
Ann E. Jarrell ◽  
Leon E. Marshall ◽  
Walter I. Thomas
Keyword(s):  
Phosphorus Uptake ◽  
Corn Hybrids ◽  
Phosphorus Accumulation ◽  
Low Phosphorus

The impact of chlorsulfuron and diclofop-methyl on nutrient uptake by wheat.

1993 ◽  
Vol 44 (8) ◽  
pp. 1757 ◽  
Author(s):  
LD Osborne ◽  
AD Robson ◽  
DG Bowran
Keyword(s):  
Nutrient Uptake ◽  
Phosphorus Uptake ◽  
Root Surface ◽  
Nutrient Concentrations ◽  
Root Weight ◽  
Low Phosphorus ◽  
Shoot Weight ◽  
The Impact ◽  
Plant Shoots ◽  
Uptake Of Nutrients

The effect of the herbicides chlorsulfuron and diclofop-methyl on nutrient uptake and utilization by wheat was examined in two glasshouse and one field experiment. In the glasshouse, chlorsulfuron decreased shoot weight, root weight and root length. Phosphorus uptake was decreased by chlorsulfuron, especially when combined with low phosphorus supply. Uptake of potassium was also decreased while uptake of nitrogen, calcium and magnesium was not affected. Under field conditions, chlorsulfuron decreased concentrations of a range of elements in plant shoots during early growth by up to 30%. This effect faded with increasing plant age. Chlorsulfuron treatment did not decrease nutrient concentrations in mature grain or grain yield. The elements in order of decreasing sensitivity to chlorsulfuron application were: macro-elements phosphorus, potassium > nitrogen, sulfur > calcium, magnesium and micro-elements zinc, copper > manganese > iron. There were differences in sensitivity to chlorsulfuron treatment between cultivars; Kulin was more sensitive than Reeves. Diclofop-methyl application had little effect on nutrient concentration in plant shoots. Zinc and copper concentrations were reduced in vegetative growth, although only copper concentrations were reduced in mature grain of Kulin. The uptake of nutrients which principally move to plant roots by diffusion was decreased more by herbicides than the uptake of nutrients which principally move by mass flow. It is therefore likely that the herbicides are modifying the ability of roots to explore soil rather than decreasing absorption at the root surface.

Genotypic differences in wheat for uptake and utilisation of P from iron phosphate

2002 ◽  
Vol 53 (7) ◽  
pp. 837 ◽  
Author(s):  
L. D. Osborne ◽  
Z. Rengel
Keyword(s):  
Genotypic Variation ◽  
Phosphorus Uptake ◽  
Dry Weight ◽  
Iron Phosphate ◽  
Phosphorus Efficiency ◽  
Genotypic Differences ◽  
Phosphorus Use Efficiency ◽  
Shoot Dry Weight ◽  
Shoot Weight ◽  
P Supply

Two glasshouse experiments were conducted to evaluate the genotypic variation amongst cereal genotypes in phosphorus uptake from relatively insoluble iron phosphate. Optimum rates of iron phosphate were established by growing 3 wheat and 1 triticale genotype on an infertile sand amended with iron phosphate. Shoot dry weight of all genotypes showed a classic Mitcherlich response with 95% maximum growth achieved with 174�mg P/kg soil. Two rates of FePO4 were selected representing a deficient and sufficient supply (26 and 339 mg P/kg soil, respectively). These rates were used to screen 99 wheat, 8 triticale, and 4 cereal rye genotypes for phosphorus-use efficiency. Phosphorus efficiency was rated by 4 criteria: shoot dry weight at deficient P supply, shoot weight at deficient supply relative to shoot weight at sufficient P supply, P uptake efficiency (amount of P taken up per unit of P supplied), and P utilisation efficiency (shoot weight per unit P in plant). No genotypes were rated as efficient under all 4 criteria. Only 2 genotypes were rated efficient (rye Bevy, rye PC00361) and one inefficient (Machete) under 3 criteria. Seven genotypes were rated as efficient on 2 indices (wheat Chinese 80-55, Westonia, and Wawht 2147; triticale Treat, AT48-94, and TX93-78-1; rye Bulgarian Pento), whereas 7 genotypes were rated as inefficient on 2 indices (Boricuta, Cadoux, Cunderdin, Insignia, Kalingri, Perenjori, and triticale Abacus). Significant genotypic variation was identified in cereals in the ability to take up and utilise P from poorly soluble Fe-P, although all genotypes were able to utilise this source of phosphorus to some degree.

Acid phosphatase activity of intact roots and phosphorus nutrition in plants. 2. Variations among wheat roots

1980 ◽  
Vol 31 (3) ◽  
pp. 441 ◽  
Author(s):  
KD McLachlan
Keyword(s):  
Phosphatase Activity ◽  
Optical Density ◽  
Geographic Origin ◽  
Phosphorus Uptake ◽  
Low Fertility ◽  
Fresh Weight ◽  
Phosphatase Activities ◽  
Low Phosphorus ◽  
Phosphorus Status ◽  
Selection For

Variation in phosphatase activity (E.C. 3.1.3.41) in some cultivated wheats and wild progenitors was examined and a comparison made. The limits likely to occur in wheat were estimated, and the usefulness of phosphatase activity as an indicator of plant potential for exploiting low phosphorus status situations was explored. Under the test conditions, within the cultivated wheats, the phosphatase activity varied in optical density from 4.6 to 9.3 per g fresh weight (P < 0.001), and selections among wheats on this basis could be made. Phosphorus uptake and total dry matter yield were negatively related to phosphatase activity (r = - 0.80 and - 0.82 respectively, each P < 0.00l), providing further supportive evidence of the proposition that plants with lower phosphatase activities may gain and use phosphorus more readily than plants with higher ones. The phosphatase activity of wild and cultivated progenitors of modern wheats ranged in optical density from 15.5 to 45.4 per g fresh weight. All the cultivated species had low phosphatase activities which, on the basis of the proposition, suggests that some unconscious selection for ability to use low fertility situations may have occurred with the domestication of wheat. On the other hand, there was no apparent grouping according to geographic origin of earlier cultivars used in Australia with respect to phosphatase activity to suggest any conscious selection for ability to grow well on low phosphorus status soils.

GENOTYPIC DIFFERENCES IN ROOT MORPHOLOGY AND PHOSPHORUS UPTAKE KINETICS INBRASSICA NAPUSUNDER LOW PHOSPHORUS SUPPLY

2010 ◽  
Vol 33 (6) ◽  
pp. 889-901 ◽  
Author(s):  
Yifan Hu ◽  
Xiangsheng Ye ◽  
Lei Shi ◽  
Haiyan Duan ◽  
Fangsen Xu
Keyword(s):  
Root Morphology ◽  
Phosphorus Uptake ◽  
Uptake Kinetics ◽  
Genotypic Differences ◽  
Low Phosphorus
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