 |
 |
Salinity is a
major stress in agricultural production systems |
 |
Salinity
affects plants and crops in various ways. Germination can fail or
may be delayed, crop establishment, dry matter production and leaf
area development may be decreased, seed set can decrease and
sterility increase. The severity of these effects depends on several
factors: (i) the intensity of the stress, (ii) the climatic
conditions and (iii) the resistance level of the genotype.
Salt stress affects the entire plant at all development stages and
rice sensitivity to salt varies between growth stages. Salt
resistance is composed of avoidance and tolerance components. In
non-halophytes avoidance is defined as the ability to restrict the
entry of ions into the shoot resulting in lower sodium concentration
in the leaves.
My research has focussed on interactions between environmental
conditions and stress expression in plants. We investigated the
effect of season and or VPD on salt uptake and distribution, the
genotypic variability in stress responses as well as salinity
effects on development, growth and yield in various crops. Mainly we
focussed on rice, but there is also work on barley, wheat,
jatropha, and recently sweetpotao. |
|
|
Salinity effects
on rice |
|
PhD |
People |
 |
Kristian
Johnson
Interactive effects of water saving irrigation and salinity on
rice gentypes in the Mekong delta
Dissertation, University of
Hohenheim - ongoing. |
 |
Folkard Asch
Physiologische Faktoren
der Salzresistenz bei Reis (Oryza sativa L.). Dissertation, University of
Hamburg, 1997. |
|
MSc |
|
 |
"Modelling
concepts for Sodium and Potassium Uptake in Rice Plants as a
Function of Transpiration"
Master of
Science Thesis 2004, Sankar Das [Bangladesh].
|
 |
"Salinity Effects
on Tiller and Leaf Appearance and on Development Rate of Individual
Leaf Positions in Irrigated Rice"
Master of Science Thesis 2004, Keshav
Dahal ([Nepal].
|
|
BSc |
|
 |
Effect of
seed priming on early seedling vigor of rice genotypes grown under
salinity.
Bachelor of Science Thesis, Tabea Mengen
[Germany] |
|
|
|
|
Paper |
Publications |
|
|
Asch, J., Johnson, K., Mondal, S., Asch,
F. 2022. Comprehensive assessment of extraction methods for
plant tissue samples for determining sodium and potassium via flame
photometer and chloride via automated flow analysis. Journal of Plant
Nutrition and Soil Science, open access.
https://doi.org/10.1002/jpln.202100344 |
|
|
Tatar, Ö.,
Brueck, H., Gevrek, M.H., Asch, F., 2010
Physiological responses of two Turkish rice (Oryza sativa L.)
varieties to salinity. Turkish
Journal of Agriculture and Forestry
34 (6), 451-459. |
|
|
Asch,
F., Wopereis, M. S. C., 2001
Responses of field-grown irrigated
rice cultivars to varying levels of floodwater salinity in a
semi-arid environment. Field Crops Research 70, 127-137. |
|
|
Asch,
F., Dingkuhn, M., Dörffling, K., 2000
Salinity increases CO2
assimilation but reduces growth in field-grown, irrigated rice. Plant and
Soil 218, 1-10. |
|
|
Asch,
F., Dingkuhn, M., Miezan, K., Dörffling, K., 2000
Leaf K/Na ratio
predicts salinity induced yield loss in irrigated rice. Euphytica 113,
109-118 |
|
|
Asch,
F., Dingkuhn, M., Wittstock, C., Dörffling, K., 1999
Sodium and
Potassium Uptake of Rice Panicles as Affected by Salinity and Season in
Relation to Yield and Yield Components. Plant and Soil. 207, 133-145. |
|
|
Asch,
F., Dörffling, K., Dingkuhn, M., 1995
Response of Rice
Varieties to Soil Salinity and Air Humidity: a possible Involvement of
Root-borne ABA. Plant and Soil 177, 11-19 |
|
Books |
|
|
|
Asch,
F., Dingkuhn, M., Wopereis, M.S.C., Dörffling, K., Miezan, K.M., 1997
A Conceptual Model for Sodium Uptake and Distribution in Irrigated Rice.
In: Applications of Systems Approaches at the Field Level, 201-217. Eds.
M. J. Kropff et al., Dordrecht, Kluver Academic Publishers |
|
|
Asch,
F., Dingkuhn, M., Dörffling, K., 1997
Physiological Stresses of Irrigated Rice caused by Soil Salinity in the
Sahel. In: Irrigated Rice in the Sahel: Prospects for Sustainable
Development. Eds. K. M. Miezan, M. C. S. Wopereis, M. Dingkuhn, J.
Deckers, T. F. Randolph. Pp 247-273. West Africa Rice Development
Association, BP 2551, Bouaké 01, Cote d'Ivoire. |
|
Poster |
|
|
|
|
 |
Mengen,
A. T., Johnson, K., Asch, F.,
2021.
"Effects of halo- and hydro priming on early rice seedling
vigor under salinity"
Tropentag 2021: Food and nutrition security and its resilience
to global crises, Tielkes, E. (ed.) - Hohenheim, Germany |
|
 |
Nguyen,
V.H., Asch, F., Germer, J., Duong, V.N., 2020.
"Applying geo-electric methods to investigate soil salinity
in rice production systems in the Vietnam Mekong Delta".
Tropentag 2020: Food and nutrition
security and its resilience to global crises, Tielkes, E. (ed.)
- Witzenhausen, DITSL |
|
 |
Wimmer,
M., Asch, F., 2005.
"Relationships between transpiration, ion uptake and
distribution in salt-stressed irrigated rice"
XV. International Plant Nutrition Colloquium, 14.-19. Sept.
2005, Beijing.
|
|
|
|
Dahal, K.
P, Das, U. S., Asch, F., 2003.
"Salinity in irrigated rice. I. Effects of salinity on
tiller and leaf number, leaf appearance rate, and leaf duration."
Deutscher
Tropentag 2003, October 8-10, University of Göttingen. |
|
|
Das, U.S.,
Dahal, K. P., Asch, F., 2003.
"Salinity in irrigated rice. II. Concept models to
simulate salinity effects on leaf appearance, duration and
transpiration."
Deutscher
Tropentag 2003, October 8-10, University of
Göttingen. |
|
|
Asch, F.,
Dahal, K. P., Das, U. S., 2003.
"Salinity in irrigated rice. III. Is the transpiration
history of leaves indicative for the salt load of individual
leaves?"
Deutscher
Tropentag 2003, October 8-10, University of
Göttingen. |
|
|
Asch, F.,
Wopereis, M. S. C., 2000.
"Yield responses of irrigated rice to salinity depend on
development stage and stress level."
3rd International Crop Science Congress, August 17th-22nd, 2000.
Hamburg, Germany |
|
|
Asch, F., Dingkuhn,
M., Dörffling, K., 1997.
"Effects of Transpiration on Sodium and Potassium
Distribution in Salt-Stressed Irrigated Rice."
Annual Meeting Society of Experimental Biology |
|
|
Salinity
effects on barley and wheat |
|
PhD |
People |
 |
Oscar Obidiegwu
funded by the Food Security Center, University Hohenheim and
the Foundation fiat-panis |
|
MSc |
|
 |
"Untersuchungen
zur genotypischen Salzresistenz von Gerste in semi-ariden Gebieten"
Diplomarbeit 2006, Said Dadshani [Afghanistan]. |
|
BSc |
|
 |
"Effects of
VPD on threshold and slope of salt tolerance in barley"
Bachelor of
Science Thesis, Markus Kaiser, [Germany] |
|
Paper |
Publications |
|
|
Badridze, G.,
Weidner, A., Asch, F., Börner, A., 2009
Variation in salt tolerance within a Georgian wheat germplasm
collection. Genetic Resources and Crop Evolution, 56 (8), 1125-1130. |
|
Poster |
|
|
|
Weidner,
A., Badridze, G., Asch, F., Börner, A. 2009.
"Screening for Variability in Salt tolerance within a
Georgian Wheat Germplasm Collection"
Tropentag 2009, October 6-8, University of Hamburg, Hamburg.
Proceedings
|
|
|
Weidner,
A., Asch, F., Buck-Sorlin, GH., Börner, A. 2007.
"QTLs for salt resistance vary with development stage in
field-grown Barley". Tropentag
2007, October 9-11, University of Kassel-Witzenhausen,
Witzenhausen.
|
|
|
Weidner,
A., Asch F., Buck-Sorlin, G., Dadshani, S., Börner, A., 2006
"Improving Salt Tolerance: A
worldwide challenge for plant nutrition and breeding"
Annual Meeting of the German Society for Plant Nutrition:
"Plant Nutrition meets Plant Breeding",
26.-28.10.2006, Hohenheim |
|
|
Dadshani,
S. A. W., Weidner, A., Buck-Sorlin G. H., Börner, A. , Asch, F.,
2004
"QTL Analysis for Salt Tolerance in Barley"
Deutscher
Tropentag 2004, October 5 - 7, Humboldt University, Berlin |
|
|
Salinity
effects on Sweet potato and Potato |
|
PhD |
People |
 |
Shimul
Mondal
Salinity effects on Sweet potato
Dissertation, University of
Hohenheim - ongoing. |
|
|
|
|
MSc |
|
|
VPD and
salinity effects on leaf area development and stomatal conductance in contrasting sweet potato
clones
Master of Science Thesis Hemanth Kumar
Pupalla [India] |
|
|
|
|
BSc |
|
|
Effect of VPD
and salinity on the transpiration rate of sweet potato leaves
varying in age
Bachelor of Science Thesis, Marc Neuberger
[Germany] |
 |
Tagesrythmen
in Transpiration und Photosynthese von Süßkartoffelblättern in
Abhängigkeit von Salzstress, relativer Luftfeuchtigkeit und
Blattalter
Bachelor of Science Thesis, Carlotta Muhle
[Germany] |
 |
Transpiration
und Photosynthese von Süßkartoffelblättern in Abhängigkeit von
Salzstress, relativer Luftfeuchtigkeit und Blattalter
Bachelor of Science Thesis, Loraine Pesch
[Germany] |
 |
Einfluss von
Salzstress und VPD auf die Transpiration von Süßkartoffelsorten
Bachelor of Science Thesis, Marielies
Schopfhauser [Austria] |
 |
Einfluss von Salzstress auf die physiologische Aktivität von
Bälttern unterschiedlichen Alters bei der Süßkartoffel.
Bachelor of Science Thesis, Susanne Burgert, [Germany] |
 |
Einfluss von
VPD auf die Ionenaufname und Verteilung bei Süßkartoffel unter
Salzstress.
Bachelor of Science Thesis, Linda
Mvogo-Binelli, [Germany] |
 |
Auswirkungen
von Salzstress auf die enzymatische Sauerstoffradikalentgiftung in
Kartoffelblättern
Bachelor of Science Thesis, Ines Münchinger
[Germany] |
|
|
|
|
Paper |
Publications |
|
|
Mondal, S.,
Rahaman, E. H. M. S., Asch, F. 2022.
Potassium content is the main driver for salinity tolerance in sweet
potato before tuber formation. Journal of Agronomy and Crop Science,
https://doi.org/10.1111/jac.12599 |
|
|
Asch, J., Johnson, K., Mondal, S., Asch,
F. 2022. Comprehensive assessment of extraction methods for
plant tissue samples for determining sodium and potassium via flame
photometer and chloride via automated flow analysis. Journal of Plant
Nutrition and Soil Science, open access.
https://doi.org/10.1002/jpln.202100344 |
|
|
|
|
Poster |
|
 |
Mondal,
S., Rahman, E. H. M. S., Asch, F.,
2022.
"Water uptake does not drive sodium and chlorine uptake
in sweetpotato genotypes exposed to salt stress"
Tropentag 2022: Can Agroecological Farming Feed the World, Tielkes, E. (ed.) -
Prague, Czech Republic |
|
 |
Mondal,
S., Rahman, E. H. M. S., Asch, F.,
2021.
"Physiological responses and ion accumulation of twelve
sweetpotato clones subjected to salinity"
Tropentag 2021: Food and nutrition security and its resilience
to global crises, Tielkes, E. (ed.) - Hohenheim, Germany |
|
 |
Mondal,
S., Burgert, S., Hartmann, J., Rahman, E. H. M. S., Asch, F.,
2020.
"Salinity effects on the activities of ROS scavenging enzymes
in leaves of two Sweet potato clones"
Tropentag 2020: Food and nutrition security and its resilience
to global crises, Tielkes, E. (ed.) - Witzenhausen, DITSL |
|
|
|
|
|
|
|
|
