Transgenic barley producing essential polyunsaturated fatty acids

Autor: Milan Čertík, Marcela Gubišová, Ivana Dokupilová, Daniel Mihálik, Katarína Ondreičková, Tatiana Klempová, Ján Kraic, Jozef Gubiš, L. Ohnoutková, Lenka Klčová, Martina Hudcovicová
Rok vydání: 2014
Předmět:
Zdroj: Biologia plantarum. 58:348-354
ISSN: 1573-8264
0006-3134
Popis: Polyunsaturated fatty acids (PUFAs) affect diverse physiological processes and human health. Most cereals are poor in n-3 and n-6 PUFAs. Using biolistics, barley (Hordeum vulgare L. cv. Golden Promise) was transformed with an artificial gene encoding Δ6-desaturase (D6D) under an endosperm-specific promoter. This artificial gene was designed from the sequence of D6D of the filamentous fungus Thamnidium elegans, but codon usage was optimised for cereals. A signal sequence from the gene encoding for high molecular mass glutenin Dx5 was added to a destinate mature protein. Successful transformation was confirmed in T0 plants at the genomic level and in T1 seeds at the transcriptomic and metabolomic levels. Transformed plants produced up to 0.141 % of γ-linolenic acid (GLA) and 0.294 % of stearidonic acid (SDA) of the total amount of fatty acids in their grains. Although the content of these fatty acids was relatively low, the current study provides the first evidence that transgenic barley can be a source of GLA/SDA.
Databáze: OpenAIRE
Externí odkaz: