Dr. Keshav Dahal

Image Keshav Dahal
Chercheur scientifique
  • Physiologie du stress sur les cultures
  • Adaptation/acclimatation aux stress environnementaux
  • Stress dû à la sécheresse et à la chaleur à des niveaux croissants de CO2 
  • Phénomique à haut débit
Agriculture et Agroalimentaire Canada

Recherche et / ou projets en cours

  • Phénotypage à haut débit des pommes de terre pour la tolérance à la sécheresse : optimisation de chaque goutte
  • Physiologie de la résistance à la flétrissure verticillienne chez les pommes de terre   
  • Pommes de terre à des niveaux croissants de CO2 et de sécheresse

Énoncés de recherches/projets

  • Identification et caractérisation des génotypes de pomme de terre qui présentent une capacité accrue de tolérance à la sécheresse et de rendement en tubercules
  • Identification des caractéristiques physiologiques et biochimiques de la pomme de terre liées à la sécheresse
  • Application de la réflectance hyperspectrale comme outil de phénotypage à haut débit pour l’estimation par approximation des caractères physiologiques et biochimiques des feuilles
  • Décryptage du mécanisme physiologique de la résistance à la flétrissure verticillienne chez les plants de pommes de terre
  • Détermination des effets d’une concentration élevée de CO2 sur la croissance des plants de pommes de terre et le rendement en tubercules

Activités professionnelles / intérêts

  • Adaptation/acclimatation aux stress environnementaux tels que la sécheresse, la chaleur et les faibles teneurs en éléments nutritifs
  • Phénotypage à haut débit des caractères physiologiques et biochimiques des feuilles
  • Télédétection de la santé des cultures et prédiction du rendement par imagerie hyperspectrale
  • Amélioration de l’efficacité de l’utilisation de la lumière dans la biomasse et le rendement des cultures

 

Prix et études

Études :

  • Chercheur au niveau postdoctoral, Université de Toronto, 2017
  • Ph. D. en biologie végétale, Université Western, London, 2012
  • M. Sc. en agriculture, Université de Bonn, Allemagne, 2004
  • B. Sc. en agriculture, Université de Tribhuwan, Népal

Distinctions :

  • Bourse de voyage George H. Duff, Canada, 2015 et 2016
  • Bourse de recherche de cycle supérieur, Université Western, London, 2007-2012
  • Bourse en sciences de la vie Irene Uchida, Université Western, London, 2011
  • Bourse de voyage du Réseau des cultures vertes, Canada, 2007-2011
  • Prix de l’Office allemand d’échanges universitaires (DAAD), Allemagne, 2006
  • Prix Europe-Asia Link, 2005-2006
  • Bourse de l’Agence japonaise de coopération internationale (JICA), 2005 (refusée)
  • Bourse du ministère de l’Agriculture, gouvernement de l’Égypte, 2005 (refusée)
  • Bourse de l’Office allemand d’échanges universitaires (DAAD), Allemagne, 2002-2004
  • Bourses d’excellence pendant l’obtention du B. Sc. en agriculture au Népal

Expérience et / ou de travail international

  • Agent responsable de l’agriculture, ministère de l’Agriculture, Népal, 2006
  • Gestion de cycle de projet, Université Humbold, Allemagne, 2006
  • Paramètres de base du sol, Université de Kiel, Allemagne, 2005

Principales publications

Pour une liste complète de publications, visitez : AAC en ligne

Peer - Review Journal Articles

  • Dahal K, Li XQ, Tai H, Creelman A, Bizimungu B (2019) Improving potato stress tolerance and tuber yield under climate change scenario – a current overview. Front. Plant Sci. 10:563. doi: 10.3389/fpls.2019.00563
  • Dahal K, Vanlerberghe GC (2018) Growth at elevated CO2 requires acclimation of the respiratory chain to support photosynthesis. Plant Physiol 178:82-100.
  • Dahal K, Vanlerberghe GC (2018) Improved chloroplast energy balance during water deficit enhances plant growth: more crop per drop. J Exp Bot 69:1183-1197.
  • Dahal K, Vanlerberghe GC (2017) Alternative oxidase respiration maintains both mitochondrial and chloroplast function during drought. New Phytol 213:560-571.
  • Dahal K, Martyn GD, Alber NA,Vanlerberghe GC (2017) Coordinated regulation of photosynthetic and respiratory components necessary to maintain chloroplast energy balance in varied growth conditions. J Exp Bot 68:657-671.
  • Hüner NPA, Dahal K, Bode R, Kurepin LV, Ivanov AG (2016) Photosynthetic Acclimation, Vernalization, Crop Productivity and ‘the Grand Design of Photosynthesis. J  Plant Physiol 203:29-43.
  • Vanlerberghe GC, Martyn GD, Dahal K (2016) Alternative oxidase: a respiratory electron transport chain pathway essential formaintaining photosynthetic performance during drought stress. Physiol Plant 157:322-337.
  • Dahal K, Martyn GD,VanlerbergheGC (2015) Improved photosynthetic performance during severe drought in Nicotianatabacum overexpressing a non-energy conserving respiratory electron sink. New Phytol 208:382-395.
  • Dahal K, Wang J, Martyn G, Rahimy F,Vanlerberghe GC (2014) Mitochondrial alternative oxidase maintains respiration and preserves photosynthetic capacity during moderate drought in Nicotianatabacum.Plant Physiol 166:1560-1574.
  • Dahal K, Weraduwage SM, Kane K, Rauf SA, Gadapati W, Savitch LV, Singh J, Marillia EF, Taylor, DC, Micallef MC, Knowles V, Plaxton W,  BarronJ,  Sarhan F,  Hüner NPA, Grodzinski B,Micallef BJ (2014) Enhancing biomass production and yield by maintaining enhanced capacity for CO2 uptake in response to elevated CO2. Can J Plant Sci 94: 1075-1083.
  • Cvetkovska M, Dahal K, Jin C, Alber NA, Cheung M,Vanlerberghe GC (2014) Knockdown of mitochondrial alternative oxidase induces the “stress state” of signaling molecule pools in Nicotianatabacum, with implications for stomatal function. New Phytol 203: 449-61.
  • Hüner NPA, Dahal K, Kurepin LV, Savitch L, Singh J, Ivanov AG, Kane K,Sarhan F (2014) Potential for Increased Photosynthetic Performance and Crop Productivity in Response to Climate Change: role of CBFs and Gibberellic Acid. Front.Chem 2:18.
  • Dahal K, Knowles VL, Plaxton WC, Hüner NPA (2013) Enhancement of photosynthetic performance, water use efficiency and grain yield during long-term growth under elevated CO2 in wheat and rye is growth temperature and cultivar dependent. Env Exp Bot 106:207-220.
  • Kane K, Dahal K, Houde M, Badawi M, HünerNPA,Sarhan F (2013) Long-term Growth under elevated CO2 suppresses biotic stress genes in non-acclimated, but not cold-acclimated winter wheat. Plant Cell Physiol 54: 1751–1768.
  • Hüner NPA, Bode R, Dahal K, Busch F, Possmayer M, Szyszka E, Rosso D, Ensminger I, Krol M, Ivanov AG, Maxwell DP (2013) Shedding some light on cold acclimation, cold adaptation and phenotypic plasticity. Botany 91: 127-136.
  • Kurepin L, Dahal K, Savitch L, Singh J, Bode R, Ivanov A, Hurry V, Huner N (2013) Role of CBFs as integrators of chloroplast redox, phytochrome and plant hormone signaling during cold acclimation. Intern J Mol Sci 14: 12729-12763.
  • Dahal K, Gadapati W, SavitchLV, Singh J, Hüner NPA (2012) Cold acclimation and BNCBF17-over-expression enhance photosynthetic performance and energy conversion efficiency during long-term growth of Brassica napus under elevated CO2 conditions. Planta. 236:1639-1652.
  • Dahal K, Kane K, Gadapati W, Webb E, Savitch LV, Singh J, Sharma P, Sarhan F, Longstaffe FJ, Grodzinski B, Hüner NPA (2012) The effects of phenotypic plasticity on photosynthetic performance in winter rye, winter wheat and Brassica napus. Physiol Plant 144: 169-188.
  • Dahal K, Kane K, Sarhan F, Grodzinski B, Hüner NPA (2012) Cold acclimation inhibits CO2-dependent stimulation of photosynthesis in spring wheat and spring rye. Botany 90: 433-444.
  • Hüner NPA, Bode R, Dahal K, Hollis L, Rosso D (2012) Chloroplast redox imbalance governs phenotypic plasticity: the “grand design of photosynthesis” revisited. Front. Plant Sci. 3:255.

Invited Book Chapters

  • Vanlerberghe GCWang JCvetkovska M, Dahal K (2015) Modes of electron transport chain function during stress: does alternative oxidase respiration aid in balancing cellular energy metabolism during drought stress and recovery? In: Gupta KJMur LAJNeelwarne B (eds) Alternative Respiratory Pathways in Higher Plants. Wiley Blackwell, Hoboken, NJ, USA, pp 157183.
  • Dahal K, Kane K, Sarhan F,Savitch LV, Singh J, Grodzinski B,Hüner NPA (2014) CBFs (C-repeat Binding Factors) Transcription factors as targets for the maintenance of crop yield under sub-optimal growth conditions. in Passarakli, M. (ed.) - Handbook of Plant and Crop Physiology, 3rd Edition, CRC Press, pp. 313-332.
  • Kurepin L, Dahal K , Zaman M, Pharis RP (2013) Interplay between environmental signals and endogenous salicylic acid concentration. In:  Hayat S and Ahmad A (eds) Salicylic Acid – A Plant Hormone. Springer, pp 61-82.

Selected Conference/Seminar Oral Presentations (Total : 40)

  • Dahal K,Creelman A, Tai H, Bizimungu B. High-Throughput Phenotyping of Potato Plants to Screen Drought Tolerance: More Crop per Drop. Northeast Potato Technology Forum. Charlottetown, Canada. March 20-21, 2019.
  • Dahal K, Creelman A, Davidson C, Tai H. Effects of Verticillium dahliae on Photosynthetic Performance and Water Use Efficiency of Potato. Potato Association of America Meeting, Boise, Idaho, USA. July 22-26, 2018.
  • Dahal K, Huner NPA, Vanlerberghe GC. Potential for Improved Crop Productivity in Response to Climate Change. Invited speaker, Biological Seminar Series, Department of Biology, University of New Brunswick, NB, Canada, Feb 02, 2018.
  • Dahal K, Vanlerberghe GC. Alternative oxidase respiration: a mitochondrial approach to improve photosynthetic performance and water use efficiency during drought stress. A joint meeting of the Canadian Society of Plant Biologists and Canadian Association for Plant Biotechnology, Kingston, ON Canada.June 19-21, 2016.
  • Dahal K, Martyn GD,Vanlerberghe GC.Improved photosynthetic performance during severe drought in Nicotiana tabacum overexpressing a non-energy conserving respiratory electron sink. A joint meeting of the Canadian Society of Plant Biologists and Botany USA. Edmonton, Canada.July 25-29, 2015.
  • Dahal K, Bajracharya RM.The effects of land use and management and roles of organic matters on structural stability of soil in different agro-ecosystems of Nepal. University of Kiel, Germany. December 04, 2005.

Selected Poster Presentations (Total : 18)

  • Dahal K. Effects of global warming on potato yield and quality. Open House, Agriculture and Agri-Food Canada, Fredericton, NB, Canada.August 19, 2017.
  • Dahal K, Gadapati W, Savitch LV, Singh J, Sharma P, Grodzinski B, Hüner NPA. The effects of phenotypic plasticity on photosynthetic performance and water use efficiency of Brassica napus at elevated CO2: The role of CBFTranscription Factors. Green Crop Network 5th Annual Meeting, Montreal, Canada.May 3-6, 2011
  • Dahal K, Kane K, Sharma P, Sarhan F, Grodzinski B, Huner NPA. Cold acclimated winter cereals exhibit an enhanced CO2 assimilation under long-term growth at elevated CO2. Joint meeting of the American Society of Plant Biologists and Canadian Society of Plant Physiologists, Montreal, Canada.July 31 - August 4, 2010.
  • Dahal K, Das US, Asch F. Effects of salinity on tiller and leaf number, leaf appearance rate, and leaf duration in irrigated rice. Proceedings of DeutscherTropentag. Technological and Institutional Innovations for Sustainable Rural Development, University of Göttingen, Germany.October 8 - 10, 2003.

Other articles or Websites featuring Dr. Dahal’s Research:

  • PREPARING FOR THE POTATO’S FUTURE: Laying the groundwork to identify traits that will help potato crops face the impacts of climate change, SpudSmart Magazine http://spud smart.com/preparing-potatos-future/
  • Drought-resistant potatoes? This Fredericton research team is on it. Agriculture Today, Spring 2018: 59-60.

Affiliations

  • Professeur auxiliaire à l’Université du Nouveau-Brunswick, Fredericton (N.-B.), Canada
  • Membre de la Société canadienne de biologie végétale
  • Membre de la Société canadienne de biotechnologie végétale
  • Rédacteur-réviseur, Frontiers in Plant Science 
  • Rédacteur en chef adjoint, Revue canadienne de phytotechnie

Langue

Anglais