Perturbations in the auxin metabolome participate in the early response of Brassica rapa seedlings to salinity stress (CROSBI ID 649425)
Prilog sa skupa u zborniku | sažetak izlaganja sa skupa | međunarodna recenzija
Podaci o odgovornosti
Pavlović, Iva ; Pěnčík, Aleš ; Novák, Ondřej ; Vujčić, Valerija ; Radić Brkanac, Sandra ; Lepeduš, Hrvoje ; Strnad, Miroslav ; Salopek- Sondi, Branka
engleski
Perturbations in the auxin metabolome participate in the early response of Brassica rapa seedlings to salinity stress
Salinity is a major abiotic stress affecting Brassica crops. The early salinity stress response in Chinese cabbage seedlings was presented at the physiological and biochemical levels, with particular emphasis on the auxin metabolome. Short-term salinity treatments (24 hours exposure to 50-200 mM NaCl) caused dose- dependent reductions in fresh weight and root growth of seedlings, and increased levels of stress biomarkers (ROS, GSH, proline, Na+/K+ ratio). The physiological and biochemical effects of salinity stress are associated with changes in the levels of stress hormones: ABA and jasmonates (JA and JA-Ile) increased while SA declined upon treatments. Salinity stress modified auxin metabolome, at the biosynthesis of IAA and its catabolism, including irreversible conjugation and oxidation processes. The level of IAA increased gradually with salinity reaching significant increase (1.3 times) at the highest salinity (200 mM NaCl). Salinity stress partially suppresses the IPyA biosynthetic pathway and activates the alternative IAM and IAOx pathways that use IAM and IAN as IAA precursors. Levels of the catabolic IAA metabolite oxIAA increased (1.7- fold) in parallel with those of IAA, and salt stress induced irreversible amino acid conjugation of IAA, leading to a doubling of the concentration of IAA-Asp. Conversely, glucose conjugation was suppressed, causing significant reductions in levels of IAA-Glc and oxIAA-Glc. Further analyses of auxin metabolism in a differently tolerant Brassica species may further illuminate roles of auxins in salinity tolerance in Brassicaceae.
auxin metabolom ; Brassica rapa ; salinity stress ; stress hormones
short oral presentation (flash poster presentation)
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Podaci o prilogu
60-60.
2017.
objavljeno
Podaci o matičnoj publikaciji
4th Meeting on Biotechnology of Plant Products- Green for Good IV : Programme and Abstracts
Frebort, Ivo ; Holecova, Michaela
Olomouc:
Podaci o skupu
Biotechnology of Plant Products: Green for Good IV
poster
19.06.2017-22.06.2017
Olomouc, Češka Republika