Seed P-enrichment as an effective P supply to wheat

Contents Summary306I.The need to use phosphorus efficiently307II.P‐use efficiency and P dynamics in a growing crop307III.P pools in plants307IV.Phosphorus pools and growth rates310V.Are crops different from other plants in their P concentration?310VI.Phosphorus use and photosynthesis311VII.Crop development and canopy P distribution312VIII.Internal redistribution of P in a growing vegetative plant313IX.Allocation of P to reproductive structures314X.Constraints to P remobilisation315XI.Do physiological or phylogenetic trade‐offs constrain traits that could improve PUE?316XII.Identifying genetic loci associated with PUE316XIII.Conclusions317Acknowledgements317References317 Summary Limitation of grain crop productivity by phosphorus (P) is widespread and will probably increase in the future. Enhanced P efficiency can be achieved by improved uptake of phosphate from soil (P‐acquisition efficiency) and by improved productivity per unit P taken up (P‐use efficiency). This review focuses on improved P‐use efficiency, which can be achieved by plants that have overall lower P concentrations, and by optimal distribution and redistribution of P in the plant allowing maximum growth and biomass allocation to harvestable plant parts. Significant decreases in plant P pools may be possible, for example, through reductions of superfluous ribosomal RNA and replacement of phospholipids by sulfolipids and galactolipids. Improvements in P distribution within the plant may be possible by increased remobilization from tissues that no longer need it (e.g. senescing leaves) and reduced partitioning of P to developing grains. Such changes would prolong and enhance the productive use of P in photosynthesis and have nutritional and environmental benefits. Research considering physiological, metabolic, molecular biological, genetic and phylogenetic aspects of P‐use efficiency is urgently needed to allow significant progress to be made in our understanding of this complex trait.

show abstract

“…, 2009; Burns et al. , 2010; Sekiya & Yano, 2010). But is it feasible to decrease grain P while increasing yield?…”

Section: Allocation Of P To Reproductive Structuresmentioning

confidence: 99%

Opportunities for improving phosphorus‐use efficiency in crop plants

et al. 2012

View full text Add to dashboard Cite

show abstract

“…Increased P bioavailability was studied by inoculation of P-solubilizing bacteria (Canbolat et al 2006;Mishra et al 2008) and P seed coating (Peltonen-Sainio et al 2006;Sekiya & Yano 2010). Burns et al (1988) suggested the use of a stable phosphatase seed coating as a tool to enhance P bioavailability.…”

Section: Introductionmentioning

confidence: 99%

Barley seed coating with free and immobilized alkaline phosphatase to improve P uptake and plant growth

et al. 2012

View full text Add to dashboard Cite

SUMMARYCoating barley seeds with free and immobilized alkaline phosphatase was investigated as a potential means to enhance plant utilization of accumulated soil phosphorus (P). Two coating techniques were studied: film-coating and pelleting. The highest phosphatase activity retention in the coating layer, ranging from 0·48 to 0·67, was observed when seeds were film-coated with phosphatase-polyresorcinol complex (PPC). The germination of seeds film-coated or pelleted with alkaline phosphatase ranged from 0·84 to 0·97 or 0·14 to 0·25, respectively. Low germination of the pelleted seeds was attributed to freezing the seeds in liquid nitrogen (N) for the layer coating formation. Pelleted seeds were not used in the remainder of the studies. Under pot culture conditions, an increase in the soil inorganic P was detected when the seeds were film-coated with phosphatase. Moreover, the film-coating significantly increased the P uptake by plants (between 25 and 31% after 35 days after planting (DAP)). The present study showed that the seed film-coating with free and immobilized phosphatase increased the phosphatase activity in the rhizosphere and the P uptake by plants.

show abstract

“…Plants take up inorganic phosphate (Pi) from soil solution which is usually less than 1µM. This Low inorganic phosphate is due to fixation of P (10.5-15.5 Tg annum -1 ) with aluminum, calcium and iron (Sekiya et al, 2009). This huge accumulation occurs mainly in agricultural soils mostly due to irrational application of P fertilization (Bennett et al, 2001;Carpenter, 2005).…”

Section: Introductionmentioning

confidence: 99%

“…This huge accumulation occurs mainly in agricultural soils mostly due to irrational application of P fertilization (Bennett et al, 2001;Carpenter, 2005). One way to increase the P availability and reduce its accumulation is seed priming which may reduce the need for fertilizer P in subsequent crop growth (Sekiya et al, 2009). The higher contents of phosphorous in the seeds helps to with stand the P deficiency in soil, and can enhance N 2 -fixation and nodulation of legume crop (Grandi et al, 1999).…”

Section: Introductionmentioning

confidence: 99%

Evaluation of seed priming in mung bean (Vigna radiata) for yield, nodulation and biological nitrogen fixation under rainfed conditions

Umair¹,

Ali²,

Hayat³

et al. 2011

Afr. J. Biotechnol.

View full text Add to dashboard Cite

A study was carried out for improving yield and biological nitrogen fixation capacity of mung bean through priming techniques. The seeds were invigorated by traditional soaking (hydropriming), osmoconditioning (soaking of seeds in aerated, low-water-potential solutions) with potassium di-hydrogen phosphate (KH 2 PO 4), mannitol (C 6 H 14 O 6), polyethylene glycol (PEG 6000), sodium molybdate dihydrate (Na 2 MoO 4 .2H 2 O) and salicylic acid (C 7 H 6 O 3) while untreated seeds were kept as control. The experiment was carried out at two locations under different climatic conditions during the year 2007 to 2008. All the priming treatments significantly improved the dry matter yield (4001 to 5262 kg ha-1) and seed yield (713 to 948 kg ha-1) compared to the control. The highest biological nitrogen fixation (46.39 kg ha-1) was observed in phosphorous primed plants compared to the control. In conclusion, overall, priming of mung bean seed with phosphorous (P at 0.6%) was found very effective for improved germination and vigour of mung bean seeds under field conditions. It is easy and cost effective technology for resource poor farmers of the region.

show abstract

Seed P-enrichment as an effective P supply to wheat

Cited by 17 publications

References 22 publications

Opportunities for improving phosphorus‐use efficiency in crop plants

Opportunities for improving phosphorus‐use efficiency in crop plants

Barley seed coating with free and immobilized alkaline phosphatase to improve P uptake and plant growth

Evaluation of seed priming in mung bean (Vigna radiata) for yield, nodulation and biological nitrogen fixation under rainfed conditions

Contact Info

Product

Resources

About