Phytohormone profile in Lactuca sativa and Brassica oleracea plants grown under Zn deficiency.
Phytohormones, structurally diverse compounds, are involved in multiple processes within plants, such as controlling plant growth and stress response. Zn is an essential micronutrient for plants and its deficiency causes large economic losses in crops. Therefore, the purpose of this study was to analyse the role of phytohormones in the Zn-deficiency response of two economically important species, i.e. Lactuca sativa and Brassica oleracea. For this, these two species were grown hydroponically with different Zn-application rates: 10 μM Zn as control and 0.1 μM Zn as deficiency treatment and phytohormone concentration was determined by U-HPLC-MS. Zn deficiency resulted in a substantial loss of biomass in L. sativa plants that was correlated with a decline in growth-promoting hormones such as indole-3-acetic acid (IAA), cytokinins (CKs), and gibberellins (GAs). However these hormones increased or stabilized their concentrations in B. oleracea and could help to maintain the biomass in this species. A lower concentration of stress-signaling hormones such as ethylene precursor aminocyclopropane-1-carboxylic acid (ACC), abscisic acid (ABA), salicylic acid (SA) and jasmonic acid (JA) and also CKs might be involved in Zn uptake in L. sativa while a rise in GA4, isopentenyl adenine (iP), and ACC and a fall in JA and SA might contribute to a better Zn-utilization efficiency (ZnUtE), as observed in B. oleracea plants.
['Navarro-León|Eloy|E|', 'Albacete|Alfonso|A|', 'Torre-González|Alejandro de la|Ade L|', 'Ruiz|Juan M|JM|', 'Blasco|Begoña|B|']
D000040:Abscisic Acid D001937:Brassica D002853:Chromatography, Liquid D003517:Cyclopentanes D003583:Cytokinins D005875:Gibberellins D007210:Indoleacetic Acids D007541:Isopentenyladenosine D018545:Lettuce D054883:Oxylipins D010937:Plant Growth Regulators D020156:Salicylic Acid D015032:Zinc
Phytohormones Lactuca sativa Brassica oleracea Asteraceae Brassicaceae Zn metabolism