5279

4949

كارشناسي ارشد

علوم باغباني

اصفهان: دانشگاه صنعتي اصفهان،دانشكده كشاورزي

1388

سيزده،84ص.:مصور،جدول،نمودار

ص.ع.به فارسي و انگليسي

علي اكبر رامين، بهرام باني نسب

قاضي عسگر

24/3/89

اعتمادي،رزمجو

1396/10/02

كتابنامه

مهندسي كشاورزي

ID4949

به فارسي و انگليسي: قابل رويت در نسخه ديجيتالي

Effect of Salinity NaCl on Seed Germination Growth and Development and Active Substances of Echinacea purpurea Shamila Yadollahizadeh shamila 223@ yahoo com 1 March 2010 Department of Horticultural Science Isfahan University Of Technology Isfahan 8415683111 Iran Degree M Sc Language Farsi Supervisor Prof Ali A Ramin aa ramin@cc iut ac ir Supervisor Assist Prof B Baninasab bbanin@cc iut ac ir Abstract Purple coneflower Echinacea purpurea is perennial plant belonging to the Asteracea family The whole plant specifically the root have caffic acid derivatives such as chicoric acid which is important in the modern pharmaceutical industry E purpurea was propagated by seed However because of seed dormancy the germination percentage of seed is generally low This phenomenon has impaired field establishment of plant resulted in reduced yield and dimiaished grower profitability In other hand salinity may affect seed germination seedling growth and the content of secondary metabolites in plants Therefore a series of experiments were carried out to investigate the techniques to overcome seed dormancy and effects of salinity on seed germination and seedling performance of Echinacea purpurea cv Magnus In the first experiment the effect of physical and chemical factors to improve the seed germination were studied The experiment was a 5 4 factorial in a completely randomized design with four replications and 50 seeds per replication Treatments were gibberllic acid 0 250 500 1000 and 1500 mgl 1 and chilling period 0 5 10 and 15 days at 5C0 Results indicated that the highest germination percentage germination rate and number of normally seedling obtained when seeds were soaked in GA3 at 250 mgl 1 in combinat with 10 days chilling period In the second study to determine influence of salinity regimes 0 20 40 60 and 80 mMl 1 NaCl on the seed germination an experiment was in completely randomized desing with five replications and 50 seeds per replication Results showed that the germination of E purpurea was strongly affected by all salt treatments Increased salt concentration caused a decrease in germination percentage germination rate and number of normally seedling In the lant experiment a greenhouse study was arranged to assess salt stress on the growth and content of chicoric acid of E purpurea A completely randomized desing whit five replications and five levels of salt 0 20 40 60 and 80 mMl 1 NaCl were used By in creasing the levels of salt the weight of fresh and dry shoot and root number of leaves leaf area number length and diameter of root chlorophyll content and chlorophyll fluorescence yield Fv Fm reduced Increase in the amount of salinity led to increase of sodium and decrease of potassium and mangnezium in leaf and root The salinity also increased calcium in root and decreased calcium in leaf By increasing the salinity chicoric acid increased in root These results demoustrated that E purpurea cv Magnus was sensitive to salt in seed germination and seedling growth stages Keywords Echinacea germination salinity chicoric acid

علي اكبر رامين، بهرام باني نسب

قاضي عسگر

اعتمادي،رزمجو