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Comparative proteome analysis of phosphorus-responsive genotypes reveals the proteins differentially expressed under phosphorous starvation stress in rice
Friday, 2023/03/17 | 08:31:52

V PrathapSuresh KumarAruna Tyagi

Int J Biol Macromol.; 2023 Feb 20; 123760. doi: 10.1016/j.ijbiomac.2023.123760.


Phosphorus (P)-deficiency is one of the major nutrient constraints for global rice production. P-deficiency tolerance in rice involves complex regulatory mechanisms. To gain insights into the proteins involved in phosphorus acquisition and use efficiency in rice, proteome analysis of a high-yielding rice cultivar Pusa-44 and its near-isogenic line (NIL)-23 harboring a major phosphorous uptake (Pup1) QTL, grown under control and P-starvation stress, was performed. Comparative proteome profiling of shoot and root tissues from the plants grown hydroponically with P (16 ppm, +P) or without P (0 ppm, -P) resulted in the identification of 681 and 567 differentially expressed proteins (DEPs) in shoot of Pusa-44 and NIL-23, respectively. Similarly, 66 and 93 DEPs were identified in root of Pusa-44 and NIL-23, respectively. These P-starvation responsive DEPs were annotated to be involved in metabolic processes like photosynthesis, starch-, sucrose-, energy-metabolism, transcription factors (mainly ARF, ZFP, HD-ZIP, MYB), and phytohormone signaling. Comparative analysis of the expression patterns observed by proteome analysis with that reported at the transcriptome level indicated the Pup1 QTL-mediated post-transcriptional regulation plays an important role under -P stress. Thus, the present study describes the molecular aspect of the regulatory functions of Pup1 QTL under P-starvation stress in rice, which might help develop an efficient rice cultivar with enhanced P acquisition and assimilation for better performance in P-deficient soil.


See https://pubmed.ncbi.nlm.nih.gov/36812961/


Figure: Shoot morphology of the contrasting rice genotypes. A Pusa-44, stress-sensitive recurrent parent, B near isogenic line (NIL)-23, stress-tolerant grown under Pi-starvation stress. Plants were grown until 45-days under control (16 ppm inorganic phosphorus) or treatment (0 ppm Pi) for comparative assessment (Kumar et al., 2021).

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