Dr.Ratna Kumar. Pasala Sr.Scientist

Ph.D (Plant Physiology)


Contact Address :

Indian Institute of Oilseeds Research

Rajendranagar, Hyderabad 500 030

Tel no: 

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Recent Publications (best papers in past 5 years )\

  • Srivastva AK, Ratnakumar P, Minhas PS, Suprasanna P. (2016). Plant Bioregulators for Sustainable Agriculture: Integrating Redox Signaling as a Possible Unifying Mechanism. Advances in Agronomy. Vol 137, 237–278. doi.org/10.1016/bs.agron.2015.12.002
  • Vadez, V. and Ratnakumar, P. 2016. High transpiration efficiency increases pod yield under intermittent drought in dry and hot atmospheric conditions but less so under wetter and cooler conditions in groundnut (Arachis hypogaea L.). Field Crops Research, 193, 16–23. http://dx.doi.org/10.1016/j.fcr.2016.03.001.
  • Ratnakumar P, Khan M.I.R., Minhas P.S., Sultana R., Per T. S, Deokate P.P., Nafees A. Khan, Singh Y., Rane J.  2016. Can plant bioregulators minimize the crop productivity losses caused by drought, heat stress and salinity? An integrated review. Journal of Applied Botany and Food Quality. Vol. 89. 13 - 125  DOI:10.5073/JABFQ.2016.089.00X                                                                                                                                                                            
  • Wackchaure GC, Minhas PS, Ratnakumar P., Chaudary RL. 2016.  Effect of plant bioregulators on growth, yield and water production functions of sorghum [Sorghum bicolor (L.) Moench]. Agriculture Water Management. 177, 138–145.                                                                                                                                    
  • Wackchaure GC, Minhas PS, Ratnakumar P., Chaudary RL. 2016.  Optimizing supplemental irrigation for wheat (Triticum aestivum L.) and the impact of plant bio-regulators in a semi-arid region of Deccan Plateau in India. Agriculture Water Management. 172, 9-17.                                                                       
  • Bhagat KP, Bal SK, Singh Y, Potekar S, Saha S, Ratnakumar P, Wakchaure GC, Minhas PS. (2017) Effect of reduced PAR on growth and photosynthetic efficiency of soybean genotypes. Journal of Agrometeorology19 (1) : 1-9
  • Ratnakumar P., Minhas PS, Wackchaure GC, Chaudary RL, Deokate PP. 2016. Yield and water production functions of wheat (Triticum aestivum L.) cultivars and response to exogenous application of thiourea and ortho-silicic acid. Journal of Agriculture and Environmental Research. 2 (6), 1228-1250                                                                                                                  
  • Ratnakumar P., Deokate P. P., Rane J., Jain N., Kumar V., Dirk VANDEN BERHE, Minhas P. S. 2016. Effect of Stabilized Silicic Acid Foliar Sprays on Wheat under Water Stress Conditions. Journal of Functional and Environmental Botany. 6, 17-19
  • Ratnakumar P, Rajendrudu G, Swamy PM. 2013. Photosynthesis and growth responses of peanut (Arachis hypogaea L.) to salinity at elevated CO2. Plant Soil & Environ. 59 (9) 410-416                                                                      
  • Farooq MA, Saqib Z A, Akhtar J, Bakhat HF, Ratnakumar P, Dietz K. 2015 Protective role of silicon (Si) against combined stress of salinity and boron (B) toxicity by improving antioxidant enzymes activity in rice.  SILICON DOI: 10.1007/s12633-015-9346-z           
  • Ratnakumar P and Vadez V. 2012. Tolerant groundnut (Arachis hypogaea L.) genotypes to intermittent drought maintains high harvest index and has small leaf canopy under stress. Functional Plant Biology (38), 1016- 1023
  • Hamidou F, Ratnakumar P, Halilou O, Mponda O, Kapewa T, Monyo E, Faye I, Ntare B, Nigam SN, Upadhyaya HD, Vadez  V. 2012. Selection of intermittent drought stress tolerant lines across years and locations in the reference collection of groundnut (Arachis hypogaea L.) Field Crops Research, (126), 189-199.
  • Gautami B, Pandey MK, Vadez V, Nigam S N, Ratnakumar P, Krishnamurthy L, Radhakrishnan T, Gowda MVC, Narasu L M, Hoisington DA, Knapp SJ, Varshney RK. 2012.  QTL analysis and consensus genetic map for drought tolerance traits based on three RIL populations of cultivated groundnut (Arachis hypogaea L.) Molecular Breeding Aug; 30(2): 757–772.
  • Blummel M, Ratnakumar Pand Vadez V. 2012. Opportunities for exploiting variations in haulm fodder traits of intermittent drought tolerant lines in a reference collection of groundnut (Arachis hypogaea L.). Field Crops Research, (126) 200-206                

Area of Interest

Plant Abiotic Stress Physiology; Climate Change impact and adaptations of crops; Plant bio- regulators 

Any other relevant information

Promising Technologies:

  • Ratnakumar P. Singh Y, Sureshkumar P, Bhagat KP, Nangare DD, Taware PB, Minhas PS. 2015. Ray of hope after hailstorm: a delightful boon by bioregulator- ortho silicic acid, ICAR Newsletter. 1. Pp 2-3.
  • G.C. Wakchaure, P.S. Minhas, P. Ratnakumar and R.L. Choudhary. 2016. Plant bioregulators for raising crop and water productivity ICAR Newsletter.4. Pp 1-2.