Influence of some antioxidants on growth, flower heads and essential oil content of Matricaria chamomilla, L. plants
2005
Aziz, Eiman E. | Talaat, Eiman M.
A field experiments was carried out during the two successive seasons of 20001/2002 at the Experimental Farm of Medicinal and Aromatic Plants Department, Giza, Egypt to study the effect of ascorbic acid and thiamine each at 00, 100, 200 mg/L and their combinations on growth, flower yield, essential oil yield and composition during the harvesting seasons of chamomilla plants. The obtained results showed that foliar application of ascorbic acid at 100 and 200 mg/L as well as thiamine at 100 mg/L had a significant effect in increasing plant growth and flower heads production, especially with 100 mg/L thiamine combined with 200 mg/L ascorbic acid. The same treatment also caused the maximum increase in oil percentage and yield in flower-heads. All treatments decreased chamazulene percent except with plants treated by thiamine 100 mg/L combined with ascorbic acid 200 mg/L. The same treatment g ave the highest essential oil yield as compared with other treatments and control. All treatments increased 1,8-cineol, farnesene and alpha-bisabolol and decreased bisabolol oxide and chamazulene, except foliar application of 100 mg/L thiamine combined with 200 mg/L ascorbic acid which gave the maximum content of chamazulene. Thiamine treatments did not affect bisabolol oxide A while, ascorbic acid increased the relative percentage of bisabolol oxide and the highest content was recorded from 200 mg/L ascorbic acid combined with 200 mg/L thiamine.
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