The Effects of Vermicompost and Methanol on the Trend of Changes of Chlorophyll Fluorescence Components and Some Physiological Traits of Triticale under Salinity Stress

In order to investigate the effects of salinity, vermicompost, and methanol on the trend of changes of chlorophyll fluorescence components and some physiological traits of triticale, this experimental study was conducted as factorial based on randomized complete block design with three replications in greenhouse research of the Faculty of Agriculture and Natural Resources, University of Mohaghegh Ardabili in 2022. Factors experiments included salinity in three levels (no salinity as control, salinity 50 and 100 mM by NaCl), application of vermicompost at two levels (without vermicompost as control and application of vermicompost), and methanol foliar application in three levels (foliar application with water as control, foliar application 15 and 30% volume). The results showed that the highest salinity level (100 mM) and both vermicompost and foliar application of 30% volume of methanol increased chlorophyll index (27%), nitrogen index (20.5%), stomatal conductance (38.9%), relative water content (26.7%), maximum fluorescence (27.6%), variable fluorescence (70.7%), and quantum yield (33.8%) compared to no application of vermicompost and methanol under the same of salinity level. In addition, the highest grain yield (5.4 g per plant) was obtained due to the application of vermicompost and methanol 30% volume under no-stress conditions. Based on the results of this study, it seems that the application of vermicompost and methanol can be used to mitigate the adverse effects of salinity stress due to the improvement of chlorophyll fluorescence components and some physiological traits in triticale.