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- Title
OXIDOREDUCTIVE AND HORMONAL PROCESSES IN GERMINATING LUPINE SEEDS.
- Authors
BACZEK-KWINTA, R.; WALIGORSKI, P.; KALANDYK, A.; BOREK, M.
- Abstract
The pattern of changes in some phytohormones content and oxidoreductive processes during seed germination of two lupine species was studied. During radicle protrusion (day 2), the amount of cytokinins in narrow-leafed lupine seeds greatly increased in both radicles and cotyledons, and it was accompanied with a huge drop in abscisic acid. In white lupine seeds, the increase in cytokinin was noticed only in the radicles, and the decrease in abscisic acid in the cotyledons. Both alterations, as well as the generation of superoxide radical (O2•¯) occurred to the lesser extent than in the narrow-leafed lupine cotyledons suggesting a cross-talk between the cytokinin and O2•¯ promoting germination, which was faster in the case of the narrow-leafed lupine. When the hypocotyls elongated (day 5), O2•¯ was detectable more in the radicles than in the cotyledons, and mostly in the elongation zone, in seedlings of both species. While sugar and protein were utilised by the growing seedlings, catalase and ascorbate peroxidase activities dropped by 25–50%, but non-specific peroxidase (POX) activity highly (several-fold) increased indicating regulatory role of POX in seedling development of both lupine species. From the methodological point of view it should be emphasised that the specific enzymatic activity of germinating seeds can not be the only expression of the activity, because huge alterations in the protein content can change the final result.
- Subjects
LUPINES; GERMINATION; PLANT hormones; ANTIOXIDANTS; REACTIVE oxygen species
- Publication
Oxidation Communications, 2017, Vol 40, Issue 3, p1095
- ISSN
0209-4541
- Publication type
Article