Abstract
The effect of a moderate (PEG −0.75 MPa) and severe (PEG −1.5 MPa) water deficit on SA content in leaves and roots as well as the effect of pre-treatment with SA on reaction to water stress were evaluated in two barley genotypes — the modern cv. Maresi and a wild form of Hordeum spontaneum.
Water deficit increased SA content in roots, whereas SA content in leaves did not change. The level of SA in the roots of control plants was about twofold higher in ‘Maresi’ than in H. spontaneum. After 6 hours of a moderate stress the level of SA increased about twofold in H. spontaneum and about two and a half-fold in ‘Maresi’. Under severe stress conditions the level of SA increased about twofold in the both genotypes, but not before 24 hrs of the stress.
Plant treatment with SA before stress reduced a damaging action of water deficit on cell membrane in leaves. A protective effect was more noticeable in H. spontaneum than in ‘Maresi’. SA treatment increased ABA content in the leaves of the studied genotypes. An increase of proline level was observed only in H. spontaneum. The obtained results suggest that ABA and proline can contribute to the development of antistress reactions induced by SA.
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Bandurska, H., Stroi ski, A. The effect of salicylic acid on barley response to water deficit. Acta Physiol Plant 27, 379–386 (2005). https://doi.org/10.1007/s11738-005-0015-5
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DOI: https://doi.org/10.1007/s11738-005-0015-5