Salicylic acid and potassium nitrate promote flowering through modulating the hormonal levels and protein pattern of date palm Phoenix dactylifera ‘Sayer’ offshoot | Salicilna kislina in kalijev nitrat pospešujeta cvetenje stranskih poganjkov dateljeve palme (Phoenix dactylifera ‘Sayer’) z moduliranjem ravni hormonov in vzorca proteinov

English. Salicylic acid enhances the flowering process in the plant by creating new proteins under salinity stress. The study was to determine the role of salicylic acid (500 ppm) and potassium nitrate (1500 ppm), on flowering of date palm ‘Sayer’ offshoots under salinity effect. Application of salicylic acid increased the number of clusters, the number of new leaves, the content of carbohydrates, ascorbic acid, indoleacetic acid, zeatin, gibberellin, and abscisic acid significantly under salinity compared with control. Although the measured parameters were the highest in plants treated with salicylic acid, there was no distinction among potassium nitrate treatment under saltwater, and salicylic acid treatment with saltwater. Salicylic acid and potassium nitrate treatment demonstrated some amazing contrasts in protein patterns in light of gel electrophoresis. Plants treated with salicylic acid with fresh water and with saltwater showed five and six protein bands, respectively, that differed in the molecular mass of one polypeptide compared to control with freshwater. However, there was a difference in the molecular mass of two polypeptides compared to control with salt water, which showed six bands. In contrast, potassium nitrate application showed five protein bands, whether with freshwater or with saltwater. The findings could facilitate to elucidate the flowering mechanisms in date palm.

Slovenian. Salicilna kislina pospešuje cvetenje preko tvorbe novih proteinov v razmerah slanostnega stresa. Namen raziskave je bil določiti vlogo salicilne kisline (500 ppm) in kalijevega nitrata (1500 ppm) na cvetenje stranskih poganjkov dateljeve palme (‘Sayer’) v razmerah slanosti. Uporaba salicilne kisline je značilno povečala število stranskih poganjkov, število novih listov, vsebnost ogljikovih hidratov, askorbinske kisline, indolocetne kisline, zeatina, giberelina in abscizinske kisline v razmerah slanosti v primerjavi s kontrolo. Čeprav so imeli vsi merjeni parametri največje vrednosti pri obravnavanju s salicilno kislino, ni bilo razlike v obravnavanjih s kalijevim nitratom in salicilno kislino v istih razmerah. Obravnavanja s salicilno kislino in kalijevim nitratom so imela velike razlike v vzorcu proteinov, določenem z gelsko elektroforezo. Rastline, ki so bile tretirane s salicilno kislino, sladko in slano vodo so imele pet oziroma šest proteinskih trakov, ki so se razlikovali v molekulski masi enega izmed polipeptidov v primerjavi s kontrolo, kjer je bilo samo obravnavanje s sladko vodo. Kakorkoli, v primerjavi s kontrolo, kjer je bilo obravnavanje samo s slano vodo in je bilo šest proteinskih trakov, je bila razlika v molekulski masi dveh polipeptidov. Obravnavanje samo s kalijevim nitratom je pokazalo samo pet proteinov, ne glede na obravnavanje s slano ali sladko vodo. Ti izsledki bi lahko pomagali razjasniti mehanizem cvetenja pri dateljevi palmi.