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SEEDLING RESPONSE TO WATER STRESS INDUCED BY GRADUAL DRYING OF THE SUBSTRATE – A SIMPLE METHOD TO APPROXIMATE DROUGHT RESISTANCE IN WHEAT

Domenii publicaţii > Stiinte ingineresti + Tipuri publicaţii > Articol în revistã ştiinţificã

Autori: Monica David

Editorial: Romanian Agricultural Research, 30, p.31-36, 2013.

Rezumat:

Breeding wheat for drought resistance has become a high priority in many parts of the world. Short duration seedling tests under controlled conditions, which can be performed off-season for preliminary selection, could contribute to faster progress in improving wheat response to water stress. Searching for such a simple seedling test, we measured leaf elongation and second leaf drying of seedlings grown in pots filled with 500 cc perlite, and exposed to water stress induced by gradual drying. We found large differences between the studied cultivars in both leaf elongation and drying of the second leaf, and these differences were largely in agreement with the available information about the behaviour of the cultivars under drought in the field.
Therefore, we suggest that leaf elongation and leaf drying under water stress induced by gradual drying of the
substrate in a seedling test can be used for preliminary characterization and selection of genotypes in breeding
for drought resistance.

Cuvinte cheie: drought resistance, seedling test, leaf elongation, wheat

URL: http://www.incda-fundulea.ro/rar/nr30/rar30.4.pdf