Abstract
The present investigation was carried out in Sabahia Horticulture Research Station, Alexandria, Egypt during 2015/2016 - 2016/2017 seasons to study the effect of foliar application with ascorbic acid, folic acid as well as hibiscus extract on quality of Geranium (Pelargonium graveolens L.). Foliar application of ascorbic acid and folic acid as well as extract of hibiscus were sprayed twice in each cut (first spry before cut 60 days and second spray before cut 30 days). Treatments included: control water only, ascorbic acid at (100 and 200 ppm), folic acid at (50 and 100ppm) and hibiscus extract at (5% and 10%). The essential oil (%) of Geranium was determined by hydro-distillation as well as the main constituents of the volatile oil were determined by (GC). The Results showed that, all treatments (tested) caused a great increase in vegetative growth, the essential oil (%), oil yield (ml/plant and L/Fed.) and active compounds; Citronerlol, Citronelly formate, Iso-menthone, B-caryophyllene and Geranyl formate, while it decreased α-pinene and Geraniol. In addition, ascorbic acid at 200ppm, folic acid at 100ppm and hibiscus extract at (5, 10%) are sharp efficacy on increasing the vegetative growth and volatile oil yield than other treatments. Furthermore, it could be illustrated that natural drying caused pronounced changes (acceptable) in the volatile oil% and main constituents.
Highlights
The GC analysis of volatile oil samples was carried out using gas chromatography instrument stands at the Medicinal and Aromatic Plants Res
Main compounds of the volatile oils were identified by matching their retention times with those of the authentic samples injected under the same conditions
It could be concluded that using ascorbic acid at 200 ppm, folic acid at 100 ppm and extracthibiscus 5 and 10% were better treatments in increasing vegetative growth, higher volatile oil content and active compounds than other treatments
Summary
The volatile oil of Geranium is widely used in the perfumery and cosmetic industries [2,3,4]. Geranium volatile oil has become important skin care oil because it is good in opening skin pores and cleaning oily complexions [6, 7]. This oil has been found to have use in reducing pain due to postherpetic neuralgia, treating dysentery, hemorrhoids, inflammation, heavy menstrual flows, and cancer [6]. Geranium essential oil exhibited efficacy on keep the treated peach fruits during cold storage and market life periods [11]
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