Effect of different concentrations of KNO3 on physiological and biochemical properties of maize (Zea mays L.) under Salinity Stress
Subject Areas :Homa Zarei 1 , محمد صدقی 2 * , Salim Farzaneh 3 , Haniyeh Saadat 4
1 - M.Sc. of Seed Science and Technology, University of Mohaghegh Ardabili, Ardabili, Iran
2 - استاد گروه علوم و مهندسی تولید و ژنتیک گیاهی، دانشکده کشاورزی و منابع طبیعی، دانشگاه محقق اردبیلی، اردبیل، ایران.
3 - University of Mohaghegh Ardabili
4 - University of Mohaghegh Ardabili
Keywords: Antioxidant enzymes, KNO3, Priming, Sodium chloride,
Abstract :
In order to investigate the effect of different concentrations of KNO3 on physiological and biochemical properties of maize (Zea mays L.) under salinity stress a factorial experiment was conducted based on completely randomized design at the University of Mohaghegh Ardabili in 2021. Treatments included three salinity levels (0, 100 and 200 Mm) and three KNO3 levels (0, 1.5 and 3%). The results showed that the highest germination percentage (GP), germination rate (GR), germination uniformity (GU), radicle and plumule length (RL and PL) and radicle fresh and dry weight (RFW and RDW) was related to priming with KNO3 3% and without salinity. Mean of germination time (MGT) compared to the control showed a reduction about 53%. The activity of catalase, peroxidase and superoxide dismutase enzymes in priming with KNO3 3% and 200 mM salinity compared to the control showed an increase about 56, 68 and 67%, respectively. Salinity decreased the activity of amylase, but priming with KNO3 increased the activity of this enzyme. The total seed protein content in KNO3 3% pretreatment and without salinity was increased about 63%. In general, priming with KNO3 3% solution can be considered as the best treatment to improve the physiological and biochemical properties of corn under salinity stress.
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