نوع مقاله : مقاله پژوهشی
نویسندگان
1 گروه مهندسی تولید و ژنتیک گیاهی، دانشکده کشاورزی و منابع طبیعی، دانشگاه محقق اردبیلی، اردبیل، ایران.
2 گروه مهندسی تولید و ژنتیک گیاهی، دانشکده کشاورزی و منابع طبیعی، دانشگاه محقق اردبیلی. اردبیل، ایران.
چکیده
کلیدواژه‌ها
موضوعات
عنوان مقاله [English]
نویسندگان [English]
Background and objectives: Salinity is one of the most important environmental stresses that reduce the growth and yield of crop plants. Application of biofertilizers increases yield and the resistance of plants against various environmental stresses, such as salinity. Also, zinc plays an important role in protein metabolism, photosynthetic activity and some physiological traits crop plants. Zinc deficiency is recognized as a critical problem in plants, especially grown on saline conditions with high pH values. But, recent researches have shown that a small amount of nutrients, particularly Zn applied by foliar spraying can affect ability of plants to salinity stress. Silicon is also a complementary micronutrient for biological systems and has an important physiological role in increasing resistance of plants against various environmental stresses. The aim of this research was to investigate Azosperlium and nanoparticles (zinc and silicon) effects on yield and some physiological traits of triticale under salinity stress.
Materials and methods: This experiment was conducted as factorial based on randomized complete design with three replications in greenhouse research of the Faculty of Agriculture and Natural Resources, University of Mohaghegh Ardabili during 2022. Factors experimental were included salinity stress at three levels (no application of salinity as control, application of 60, 120 mM salinity) by NaCl, application of plant growth promoting rhizobacteria at two levels (no seed inoculation as control and seed inoculation with Azospirillium) and foliar application of nanoparticles at four levels (foliar application with water as control, foliar application of 0.8 g.L-1 nano Zn oxide, foliar application 50 mg.L-1 nano silicon, combined foliar application of 0.4 g.L-1 of nano zn oxide and 25 mg.L-1 of nano silicon).
Results: The results showed that application of Azospirlium and foliar application of nano zn-silicon oxide under no salinity condition increased chlorophyll index (49.24%), relative water content (59.82%), stomata conductivity (57.6%), maximum fluorescence (52.77%), variable fluorescence (136.09%), quantum yield (54.24%) and grain yield (47.23%) in comparison with of no application of PGPR and nanoparticles under salinity 120 mM. But electrical conductivity and minimum fluorescence (54.6 and 49.15% respectively) decreased in comparison with no application of PGPR and nanoparticles under the same of salinity level.
Conclusion: The results of this study showed that application of Azospirlium and foliar application of nano Zn-silcon oxide can increase the grain yield of triticale at salinity mM due to improving fluorescence indices and some physiological traits such as stomata conductivity, chlorophyll index and relative water content. Therefore, application of plant growth promoting rhizobacteria and nanoparticles (Zn and Si) can be suggested as an effective method for moderate the effects of salinity stress.
کلیدواژه‌ها [English]
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