INFLUENCE OF JASMONIC ACID AND GROWING MEDIA ON GROWTH AND YIELD OF Freesia hybrida CV. JESSICA

	INFLUENCE OF JASMONIC ACID AND GROWING MEDIA ON GROWTH AND YIELD OF Freesia hybrida CV. JESSICA
Euphrates Journal of Agriculture Science
Article 1, Volume 7, Issue 1, 2015, Pages 21-33
Abstract
ABSTRACT : The study was carried out at one of plastic houses belonged to Hort. Dept. Coll. of Agric. Univ. of Baghdad on Fall season of 2013-2014. Corms of Fressia hybrida cv. jessica were on plastic pots with 25 cm. diameter, they were filled up with six kinds of growing media: peatmoss only, soil + peatmoss 1:1, peatmoss + perlite (per.)+ vermiculite(ver.) 2:1:1, soil +peatmoss+ per + ver. 2:2:1:1 and finally per.+ver. 1:1. Plants were foliar sprayed twice. The results could be summarized as follow: Foliar applications of jasmonic acid concentrations were not significantly affect most of vegetative and flowering characters under study. The best response on No. of leaves plant, No. of inflorescences, length of flowering stalk and anthocyanin content was recorded with 20 mgl JA, ( 12.67, 6.88, 43.11, 54.61) respectively. The treatment 10 mgl of JA was superior on increasing chlorophyll content (185.4) , while 5 mgl of JA was the best on increasing dry weight of vegetative growth (2.87) and No. of cormsplant (2.92). The best response was recorded on plants planted on peatmoss only medium, plant height was 63.50, No. of leaves 12.83, leaf area 683cm2, chlorophyll content 197.3 mg100g., dry weight of flowers 4.49g., No. of inflorescencesplant 8.12, length of stalk 45.4, diameter of stalk 5.55mm., flowering duration 8.25 days, dry weight of flowers 6.64, anthocyanin content 64.81 mg100g. and No. of cormsplant 3.62. Most of the interaction treatments were significantly effective on vegetative, flowering and corms characters.

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