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Title

ASSIGNING THE BEST TREATMENT FOR INCREASING GERMINATION OF SEEDS IN 5 MEDICINAL AND FRAGRANT PLANTS

Writers

RAHMANPOUR HALEH | NASAJ F.

Pages

 Start Page 129 | End Page 153

Abstract

 In Iran National Botanical Garden, ripe SEEDs of 5 Fragrant and Medicinal plants (Campsis grandiflora (Thunb.) Schuman, CATALPA SPECIOSA Warder, Cupressus sempervirens L. var. fastigiata, MELIA AZEDARACH L., THUJA ORIENTALIS.L.) were collected in periods. They were put under PRETREATMENT for consideration of suitable GERMINATION methods of SEEDs as follows.1- Phisical motive: Soaking the SEEDs for 1 to 24 hours, making a hole on the top of the SEEDs, scratching the cortex of the SEEDs.2- Chemical motive: sodium hypochloride, potassium nitrate, diluted and concentarated sulphoric acid. As a result the best method for GERMINATION of SEEDs were determined.This consideration shows the best times for collecting of SEEDs and the best PRETREATMENT and TREATMENT with high percentages in GERMINATION of SEEDs as well. The best PRETREATMENT and TREATMENT for CAMPSIS GRANDIFLORA are: washing in sodium hypochloride and distilled water, 20:30oC temprature, 16h. light and 8h. darkness for 2 weaks, For CATALPA SPECIOSA are: washing in sodium hypochloride and distilled water, 20:30oC temprature, 16h. light and 8h. darkness for 1 to 2 weaks, For Cupressus sempervirens var. fastigiata are: soaking in water for 24h., 5 .minutes in potassium nitrate and washing in distilled water, chiling (1-5oC) for 8 to 12 weaks, For MELIA AZEDARACH are: soaking in water for 24h., scratching the cortex of SEEDs, 10 minutes in diluted sulphoric acid and washing in distilled water, planting in sand and 20:30oC temprature for 1 weak, For THUJA ORIENTALIS.are: soaking in water for 24h., washing in diluted sodium hypochloride and distilled water, 20oC temprature, 16h. light and 8h. darkness for 21 days.

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