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Drought strongly affects plants and in agricultural production systems

Water deficit and drought can have devastating effects on plant growth and yield. In order to exploit adaptation mechanisms, those mechanism need to be understood. Since drought affects different development stages of crops in different ways, adaptation and resistance mechanisms need to be investigated as a function of development stage.

Root-shoot signals and ABA effects



"Photosynthesis responses to root-borne signals in lowland rice during early stages of chilling and drought stress" 
Diplomarbeit, Christina Ripken [Germany].

"Morphological and Physiological Responses of Sorghum (Sorghum bicolor  L. Moench) to Different Patterns of Drought"
Master of Science Thesis, Alhassan Abdulai [Ghana].

"Stress responses and ABA root signals in relation to drought stress intensity in three upland rice cultivars"
Master Thesis KVL, Andrea Andreassen [Denmark]




Asch, F., Bahrun, A., Jensen, C.R., 2009
Root–shoot communication of field-grown maize drought-stressed at different rates as modified by atmospheric conditions. Journal of Plant Nutrition and Soil Science 172, 678-687

Andersen, M. N., Asch, F., Wu, Y., Jensen, C. R., Naested, H., Mogensen, V. O., Koch, K.E., 2002 
Soluble Invertase Expression Is an Early Target of Drought Stress during the Critical, Abortion-Sensitive Phase of Young Ovary Development in Maize. Plant Physiol. 130, 591-604.

Bahrun, A., Jensen, C. R., Asch, F., Mogensen, V. O., 2002 
Drought-induced changes of xylem pH, ionic composition, and [ABA] act as early signals in field-grown maize (Zea mays L.). Journal of Experimental Botany 53, 251-263.

Asch, F., Andersen, M. N., Jensen, C. R., Mogensen, V. O., 2001 
Ovary abscisic acid concentration does not induce kernel abortion in field-grown maize subjected to drought. European Journal of Agronomy 15, 119-129.



Asch, F., Janowiak, F., Weinand, T., 2007.
"Comparison of early, root-borne signals in maize subjected to chilling or drought".
Botanikertagung, 3.-7.9. 2007. Book of Abstracts. Pp 61-62.

Abdulai, A. L.,  Asch, F., van de Giesen, N., 2004.
"Physiological and Morphological Responses of Sorghum bicolor to Static and Dynamic Drought Conditions"
Deutscher Tropentag 2004, October 5-7, Humboldt University Berlin

Asch, F., Bahrun, A., Jensen, C. R., 2003. 
"Soil moisture availability and relative air humidity influence root signals of field-grown maize subjected to drought stress"
Festkolloquium -  Justus-Liebig-Universität Giessen, 12-13. Juni 2003.

Andersen, M.N., Hashi, M.A., Asch, F., Jensen, C.R., Wu, Y. & Koch, K.E. 2003.
"Drought impairs sugar utilization in young abortion - sensitive maize ovaries"
International Conference on Water Saving Agriculture and Sustainable Use of Water and Land Resources, Yangling-Shaanxi P.R. China, October 26-29, 2003

Andreassen, A., Asch F., Jensen, C. R., 2001. 
Stress responses and abscisic acid root signals in relation to drought stress intensity in three upland rice cultivars."
Deutscher Tropentag 2001 –  October 9-11, 2001, University of Bonn

Bahrun, A., Jensen C. R., Asch. F., Mogensen, V.O.M., 2001.
"Changes in xylem pH, ionic composition, and [ABA] of the xylem sap act as early signals in field-grown maize in response to soil drying
SEB Annual Meeting, Caterbury, UK, April 2-6, 2001

Andersen, M.N.,  Asch, F., Jensen, C.R., Naested, H., 2000.
"Drought regulates invertase expression and carbohydrate levels in maize ovaries"
6th International Congress of Plant Molecular Biology, Quebec, Canada, June 18-24, 2000

Bahrun, A., Jensen C. R., Asch. F., Mogensen, V.O.M., 2000.
"Is morning xylem ABA of field grown maize sufficient to cause stomata closure?"
3rd International Crop Science Congress, August 17th-22nd, 2000. Hamburg, Germany

 Drought effects on yield, morphology, and partitioning



"Physiological responses of field-grown potato to water deficit"
Master of Science Thesis, Leah Kuppinger [Germany]
supported by GIZ/BEAF

"Effects of variable water supply on root properties of sorghum and cowpea in mono- and inter-cropped systems"
Master of Science Thesis, Mercy Bah [Cameroon]

"Potential yield of Venezuelan maize varieties under variable water supply"
Master of Science Thesis, Gabriela Pereyra [Venezuela]

"Effect of root zone temperature and changes in precipitation on yield components and yield formation in Spring Wheat (Triticum aestivum cv. Triso)"
Master of Science Thesis, Fadi Kanso [Lebanon]

"Automatische Messung von Blattwachstumsraten unter Feldbedingungen" 
Diplomarbeit, Christian Heck [Germany



"Auswirkungen von Wasserverfügbarkeit auf die Biomassebildung bei Fallopia sp."
Bachelor of Science Thesis, Markus Streck [Germany]



Tatar,Ö.,  Brueck, H.,  Asch, F., 2015
Photosynthesis and Remobilization of Dry Matter in Wheat as Affected by Progressive Drought Stress at Stem Elongation Stage, Journal of Agronomy and Crop Science, DOI: 10.1111/jac.12160.

Asch, F., Dingkuhn, M., Sow, A., Audebert, A., 2005 
Drought-induced changes in rooting patterns and assimilate partitioning between root and shoot in upland rice. Field Crops Res. 93, 223-236.



Gerwin, W. (Ed.), Schillem, S., Asch, F., Bens, O., Bestajowsky, J., Bruns, C., Gattinger, A., Hattig, T., Hoogen, H., Hüttl, R. F., Raab, T., Rodionov, A., Schaaf, W., Schneider, B. U., Trimborn, M., 2011
Bodenmelioration und Anbauverfahren für trockenheitsgefährdete Standorte (BAtros). Cottbuser Schriften zur Ökosystemgenese und Landschaftsentwicklung 10. BTU Cottbus, Cottbus. Pp 120.



Hartmann, J., Stürz, S., Manneh, B., Sow, A., Asch, F. 2010.
"Response of transpiration of lowland rice varieties to water-saving irrigation".
Tropentag 2010, Zürich 14-16, ETH, Zürich, Switzerland

Rajaona, A., Asch, F., Brueck, H. 2010
"Response of leaf area and biomass partitionning of Physic nut to variable water supply".
Tropentag 2010, Zürich 14-16, ETH, Zürich, Switzerland

Shresta, S., Asch, F., Brueck, H., Duserre, J., Ramanantsoanirina, A. 2009. 
"Upland rice adaptation to variable water availability along an altitude gradient in Madagascar". 
Tropentag 2009
, October 6-8, University of Hamburg, Hamburg.




Natural Salinity in Senegal

 vegetative irrigated rice     salt stress effects on a rice panicle   

leaf appearance in rice affected by salinity 

Salinity trial on barley in Afghanistan 

Greehouse study on salinity effects on irrigated rice