Abstract. El-Moursi A, Talaat IM, Balbaa LK. 2012. Physiological effect of some antioxidant polyphenols on sweet marjoram (Majorana hortensis) plants. Nusantara Bioscience 4: 11-15. Two pot experiments were conducted in the screen of the National Research Centre, Dokki, Cairo, Egypt to study the physiological effect of foliar application of some antioxidant polyphenols on growth and chemical constituents of sweet marjoram plants (Majorana hortensis L.). Plants were treated with curcuminoids, cinnamic acid and salicylic acid, each at 5 and 10 mg/L except the control plants. The results indicate that foliar application of curcuminoids increased growth parameters under study. Total sugars were also increased as a result of foliar application of curcuminoids. On the other hand, oil %, oil yield, and nitrogen % were decreased as a result of curcuminoids treatments. Cinnamic acid at 5 mg/L resulted in the tallest plants in most cases. Application of cinnamic acid at 10 mg/L significantly increased oil % and total oil yield/plant. Sugar content followed the same trend. Treatment of sweet marjoram plants with salicylic acid significantly increased oil % and oil yield, especially in plants treated with 10 mg/L SA. Total sugars % and total nitrogen % followed the same trend. The main constituents of the plant essential oil were also markedly affected.
Abstract. El-Moursi A, Talaat IM, Bekheta MA, Gamal El-Din K. 2012. Physiological response of Moringa oleifera to stigmasterol and chelated zinc. Nusantara . Two pot experiments were carried out in the screen of the National Research Centre, Dokki, Giza, Egypt, during two successive seasons (2009/2010 and 2010/2011), respectively to study the effect of foliar spray with chelated zinc (100, 200 and 300 mg/L) and stigmasterol (50, 100 and 150 mg/L) on growth and chemical constituents of moringa plants (Moringa oleifera). The results indicated that treatment of plants with 300 mg/L chelated zinc or 150 mg/L stigmasterol significantly influenced the vegetative growth of moringa plants. The same treatments also significantly increased total sugars%, total protein%, total phosphorous and microelements contents in the leaves. The changes in the pattern of protein electrophoresis (SDS-PAGE) extracted from the newly formed leaves of moringa plants treated with different concentrations of chelated Zinc (Zn) or stigmasterol showed beneficial influences for improving plant growth, leaves quality and quantity. Key words: Moringa oleifera, stigmasterol, chelated zinc Abstrak. El-Moursi A, Talaat IM, Bekheta MA, Gamal El-Din K. 2012. Tanggapan fisiologis Moringa oleifera terhadap stigmasterol dan kelat seng. Nusantara Bioscience 4: 118-123.Dua pot percobaan dibuat di kebun percobaan Pusat Riset Nasional, Dokki, Giza, Mesir, selama dua musim secara berturut-turut (2009/2010 dan 2010/2011), masing-masing untuk mempelajari pengaruh penyemprotan daun dengan kelat seng (100, 200, 300 mg/L) dan stigmasterol (50, 100 , 150 mg/L) terhadap pertumbuhan dan kandungan kimia tanaman kelor (Moringa oleifera). Hasil penelitian menunjukkan bahwa perlakuan tanaman kelor dengan 300 mg/L kelat seng atau 150 mg/L stigmasterol berpengaruh signifikan terhadap pertumbuhan vegetatif tanaman. Perlakuan yang sama juga secara signifikan meningkat persentase gula total, protein total, fosfor total dan kandungan unsur mikro dalam daun. Perubahan pola elektroforesis protein (SDS-PAGE) yang diekstrak dari daun yang baru terbentuk dari tanaman kelor yang diperlakukan dengan konsentrasi kelat seng (Zn) atau stigmasterol yang berbeda menunjukkan pengaruh yang menguntungkan untuk meningkatkan pertumbuhan tanaman, kualitas dan kuantitas daun.
Divisions of running rhizomes of peppermint plants were planted in loamy clay soil in the experimental farm of National Research Centre, Dokki, Cairo, Egypt. After 21 days, the plants were exposed to low temperature 4, 7°C for 6, 9 and 12 days in controlled chamber before transplanting to large pots in winter season. Three cuttings were taken from the plants of different treatments during the season after 4, 7 and 10 months from transplanting. Representative samples of 6 replicates from each treatment were taken for the determination of vegetative growth and oil content in the leaves and branches. The results obtained indicated that the highest fresh and dry weight of leaves and branches was recorded in the second cutting, however, it markedly decreased in the third one. The highest favourable effect of cold hardening on vegetative growth was observed at 4°C for 12 days exposure in the second cutting. The percentage of volatile oil in the leaves recorded the highest values in treatment of 7°C for 6 days in the second sampling date. Cold hardening either at 4°C or 7°C resulted in pronounced increase in the essential oil yield produced by the plant with the superiority of 4°C for 12 days which recorded the highest value. It can be concluded from the obtained results that hardening peppermint plants with low temperature, particularly 4°C for 12 days before transplanting improved plant growth and considerably increased the volatile oil content in plant leaves and branches.
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