Enhancing Drought Tolerance of Wheat (Triticum aestivgum L.) Through Foliar Application of Proline and L-Triptophan

Proline and L-Triptophan Induced Drought Tolerance in Wheat

  • Asad Shabir Department of Agronomy, University College of Agriculture and Environmental Sciences, The Islamia University of Bahawalpur-63100, Pakistan
  • Muhammad Saqib Department of Agronomy, University College of Agriculture and Environmental Sciences, The Islamia University of Bahawalpur-63100, Pakistan
  • Maqshoof Ahmad Department of Soil Sciences, University College of Agriculture and Environmental Sciences,The Islamia University of Bahawalpur-63100, Pakistan
  • Muhammad Latif Department of Agronomy, University College of Agriculture and Environmental Sciences, The Islamia University of Bahawalpur-63100, Pakistan
  • Syed Asad Hussain Bukharia Department of Agronomy, Bahauddin Zakariya University, Multan-60800, Pakistan
  • Muhammad Qadir Ahmad Department of Plant Breeding and Genetics, Bahauddin Zakariya University, Multan-60800, Pakistan
  • Muhammad Dawood Department of Environmental Sciences, Bahauddin Zakariya University, Multan-60800, Pakistan
  • Muhammad Rashid Department of Agronomy, Lasbela University of Agriculture, Water and Marine Sciences, Uthal, Pakistan
Keywords: wheat, drought, proline, L-tryptophan, foliar application

Abstract

Limited water availability is one of the important abiotic factor affecting yield of wheat crop. Exogenous application of osmolytes is an important factor in reducing the stress due to water shortage. Keeping in view the role of proline and L-tryptophan (L-TRP) in stress alleviation, a study was carried out at the agricultural research area of the University College of Agriculture and Environmental Sciences, The Islamia University of Bahawalpur, Pakistan, during winter 2015-2016 to evaluate the impact of foliar applied proline and L-TRP on growth and photosynthetic efficiency of wheat grown under limited moisture supply. Drought stress was applied in three levels (I1 = control, I2  = drought stress at tillering stage and  I3 = drought stress at grain filling stage) while, foliar application of proline and L-TRP was done in six levels [T1 = control; T2 = proline (10 mM); T3 = proline (20 mM); T4 = L-TRP (10-4 M); T5 = L-TRP  (10-4 M) + proline (10 mM) and T6 = L-TRP (10-4 M) + proline (20 mM)]. The experimental results revealed that growth and photosynthetic efficiency of wheat were decreased due to reduced water supply. However, exogenously applied proline and L-TRP considerably ameliorated the effect of drought stress. Combined application of L-TRP (10-4 M) and proline (20 mM ) showed better results and induced tolerance to drought stress, in comparison with other treatments. Foliar application of proline and L-TRP also enhanced the photosynthetic rate which might be related with the improved photosynthetic pigments. Overall, exogenously applied proline and L-TRP mitigated the adverse effects of moisture deficit on growth and photosynthetic efficiency of wheat crop.

 

 

Published
2020-11-13
How to Cite
Shabir, A., Saqib, M., Ahmad, M., Latif, M., Bukharia, S. A. H., Ahmad, M. Q., Dawood, M., & Rashid, M. (2020). Enhancing Drought Tolerance of Wheat (Triticum aestivgum L.) Through Foliar Application of Proline and L-Triptophan. Biological Sciences - PJSIR, 63(3), 199-206. Retrieved from https://v2.pjsir.org/index.php/biological-sciences/article/view/1507