Dear @Jeffrey Larte Lartey Please access the following links; hope, these could be useful to you:

https://nph.onlinelibrary.wiley.com/doi/10.1111/nph.12952#:~:text=Drought%20stress%20showed%20negative%20effects,term%20(%3E%2090%20d).

https://www.nature.com/articles/s41598-018-24038-2

https://www.frontiersin.org/articles/10.3389/fpls.2017.01561/full

https://www.researchgate.net/publication/257724059_Effects_of_drought_stress_on_phosphorus_and_potassium_uptake_dynamics_in_summer_maize_Zea_mays_through_the_growth_cycle

Thank you very much

Yes, Increasing drought decreases phosphorus availability in an evergreen Mediterranean forest and plants. Drought affects many physiological and biochemical processes and thus reduces plant growth. Phosphorus (P) fertilization improves tolerance to drought stress in many plants.Drought stress showed negative effects on plant [N] (-3.73%) and plant [P] (-9.18%), and a positive effect on plant N:P. (+ 6.98%).Drought affects many physiological and biochemical processes and thus reduces plant growth. Phosphorus (P) fertilization improves tolerance to drought stress in many plants .To correct problems caused by excessive soil phosphorus, begin by avoiding future phosphorus applications. This includes eliminating organic composts and manures. If organic nitrogen sources or mulches are needed, use very low phosphorus products such as blood meal (as a nitrogen source) or pine bark mulch. Changes in soil temperature during drought conditions can affect soil organic matter (SOM) decomposition and increase the release of carbon dioxide. Also, during this process additional mineral N, mostly in the form of nitrate, will be released in the soil system.

https://link.springer.com/article/10.1007/s11104-005-0172-8

https://www.jstor.org/stable/newphytologist.204.4.924

https://www.sciencedirect.com/science/article/abs/pii/S0038071715000140

https://www.sciencedirect.com/science/article/pii/S0048969720316193

https://www.frontiersin.org/articles/10.3389/fpls.2017.02223/full

https://www.sciencedirect.com/science/article/abs/pii/S0016706119326187

https://www.sciencedirect.com/science/article/pii/S0048969720328126

Hello Jeffrey,

Under field conditions drought frequently decreases P in plants, as the comments and references from others show well, Another e.g. is

J. agric. Sci., Camb. (1981), 96, 167-186 Growth of spring barley under drought: crop development, photosynthesis, dry-matter accumulation and nutrient content BY D. W. LAWLOR, W. DAY, A. E. JOHNSTON, B. J. LEGG AND K. J. PARKINSON Rothamsted Experimental Station, Harpenden, Herts., AL5 2JQ.

These studies are all in soil systems, where P availability and solubility is decreased because of water content changes in the soil, decreased root-soil contact etc. But your work is in PEG - which could affect P solubility (has it been l

looked at?) but certainly does not decrease the root-solution contact. So it may be that there is an explanation for your result which could increase knowledge about how the P - soil - water- plant system functions. Regards David Lawlor

Good morning

Increasing drough stress decreases phosphorus content in plant

There is an important point in this question and discussion. Although dry soil conditions very clearly decrease P in plants - see earlier answers - it is possibly not the case that water deficiency in the plant, as caused by using PEG as an osmoticum, decreases P content of the plant. I would really like to see good experimental evidence to test the idea that the limiting factor in P supply to the plant is transport in the soil as opposed to uptake by the plant.

Yes, drought stress disturbs plant nutrient uptake, and it may be reduce phosphorus content in plants.