Rolul zincului în procesele de creștere și dezvoltare a plantulelor de porumb expuse secetei fiziologice
2024
Brînză, Lilia | Danilescu, Olga | Bulhac, Ion | Nedbaliuc, Boris
The present work elucidated the effect of the new zinc coordination compound, with the formula {[Zn3(HL)2(H2O)6](SO4)2⋅1.5dmf∙2.5H2O}n (CCZn) (H2L=2,6-diacetylpyridine bis(isonicotinoylhydrazone), on the growth and development processes of seedlings of Zea mays L., the hybrid SY Ulises, exposed to physiological drought. The physiological drought was induced by adding the natural polymer polyethylene glycol (PEG6000) to the aqueous solutions. PEG6000 reduced the availability of water in the solutions and caused water stress to the seedlings. The experiments were carried out in laboratory conditions, and the research results showed that the CCZn has a positive effect in the early development of maize seedlings, both under favorable conditions and drought conditions. The significant physiologically beneficial influence of CCZn in the concentration range of 0.0001 – 0.01% was highlighted. In the early stages of seedling development, under moderate drought conditions, CCZn presents characteristics of a biologically active substance with anti-stress properties, evidenced by maintaining the growth and biomass accumulation of Zea mays L. plants at a significantly higher level than in the „control plant” variant.
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