Investigating Seed Germination Indices and Absorption Rate of Sodium, Chloride, Calcium, and Potassium in Different Parts of Seedlings of Sweet Corn KSC 403 (Zea Mays L var. Saccharata) Under Salinity Stress and Seed Priming
Subject Areas : Journal of Crop EcophysiologyM. Nasrolah alhossini, 1 , A. Rahmani 2 , S. Khavari Khorasani 3
1 - Department of Agronomy and Plant Breeding, Young Researchers and Elite Club, Mashhad Branch, Islamic Azad University, Mashhad, Iran
2 - Department of Agronomy and Plant Breeding, Young Researchers and Elite Club, Mashhad Branch, Islamic Azad University, Mashhad, Iran.
3 - Assistant Prof., Khorasan Razavi, Agricultural and Natural Resources Research Center, Mashhad, Iran
Keywords: Germination Characteristics, NaCl Concentration, Osmo Priming, Slicing Interaction,
Abstract :
To investigate the effects of different levels of seed priming on germination indices and nutrient absorption at early growth stages of sweet corn (Golden Kernel Hybrid) a factorial experiment based on completely randomized design was conducted with three replications in 2011. The experiment consists of 6 levels of primings (seeds without priming, priming with tap water, priming with distilled water, priming with sodium chloride, potassium chloride, and hydrous calcium chloride) and five levels of salinity (zero, 4, 8, 12 and 16 ds/m sodium chloride). The characteristics studied were germination percentage, germination rate, root and shoot length, fresh weight and dry weight of seedling, root to shoot ratio and determination of sodium, chloride, calcium, and potassium concentration in different parts of seedlings (stems, roots and seed). The results indicated that increasing salinity stress levels decreased all parameters measured. Priming seeds with hydrated calcium chloride responded to significantly to salinity stress better than other treatments. Results also showed that increasing concentration of sodium chloride salt, increased absorption rate of sodium but concentration of calcium and potassium were reduced. Because application of hydrous calcium chloride stimulates cell in using calcium under salinity conditions it leads to improved seedling growth parameters. To achieve a more accurate results slicing interaction effect of seed priming×salinity levels was performed. Hydrous calcium chloride treatments improved all traits under study except sodium and potassium concentration. This represents a better performance of seeds germination under salinity stress when seeds primed with hydrous calcium chloride.