Effects of Arbuscular Mycorrhiza Inoculation on the Physiology of Scaevola sericea and Messerschmidia argentea under Salt Stress

• Main Authors: Hsing-Yu Lan, 藍星宇
• Other Authors: Chiang-Her Yen
• Format: Others
• Language: zh-TW
• Published: 2011
• Online Access: http://ndltd.ncl.edu.tw/handle/55224009481819751790

碩士 === 國立中興大學 === 森林學系所 === 99 === In this study, Scaevola sericea and Messerschmidia argentea were inoculated with two kinds ofendomycorrhizal fungi isolated from nursery (man-made cultural environment; M1), or from native coastal habitat (natural distribution; M2). Seedlings were grown in greenhouse, for 10 months, then treated with different salt concentrations (0%, 1%, 2% and 3%) and different time (1, 5, 10, 15, 30, 60 days). Finally, the biomass, plant nutrient, proline, total soluble carbohydrates, chlorophyll and chlorophyll fluorescence parameters were determined to evaluate the different treatments on plant growth and physiologic effects. With the increased salt concentration, the seedlings biomass, chlorophyll, Fv / Fm, ΦPS II and qP were decreased, but the proline, soluble carbohydrates and qN were increased. When the days of salt treatment were increased, the Na+, proline of leaves and qN were increased, but chlorophyll, Fv / Fm, ΦPS II and qP were decreased. Proline and soluble carbohydrates could be used as osmotic adjustment in leaves of S. sericea, but the increased K+ accumulation in root could increase osmotic potential. Increased proline concentration both in leaves and roots of M. argentea could resist osmotic stress. Mycorrhizal inoculation could increase the tolerance of S. sericea and M. argentea to salt stress, but buth with slight difference. The proline and soluble carbohydrates of S. sericea treated with M1 were significantly lower than those treated with M2. It showed that M1 could be more adapted to salt stress than M2. The root dry weight and phosphorus concentrations of M. argentea inoculated with M2 were higher than those inoculated with M1, but Na+, proline and soluble carbohydrates were significantly lower than those inoculated with M1. It showed that M2 could be more adapted to salt stress than M1. In conclusion, different time and salt concentrations were used to test the influences of salt stress on S. sericea and M. argentea. It showed that mycorrhizal inoculation played an important role in the growth and resistance to salt stress for seedlings growth.