Modern Phytomorphology

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Modification in amino acid profiles of barley and oat leaves during somaclonal breeding for abiotic resistance


Olga N. Shupletsova, Eugene M. Lisitsyn* and Irina N. Shchennikova

The creation of regenerant plants of oat and barley during somaclonal breeding using stressors (RAPEG, RACd, RAAl) and without them (RAControl) led to a decrease in the total content of free amino acids relative to the initial genotypes by 15-38%. At the same time, for barley, in vitro conditions were least affected by the content of Glu, Ser and Thr, and for oats - Thr and His. Changes in the amino acid profile in oat plants are more consistent in RAPEG-RACd pair (nine of the 15 amino acids had the same content) than in pairs RACd-RAAl (3 amino acids total) and RAPEG- RAAl (5 amino acids). For barley plants, the contents coincide of 8 different amino acids in the RAPEG-RAAl and RAPEG-RACd comparison pairs and of 7 amino acids in the RACd-RAAl pair. It is assumed that the change in the amino acid profile during somaclonal breeding is more determined by the species (cultivar) belonging of the used plant genotype than by the type of stressor.


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