Photosynthetica 2006, 44(3):474-477 | DOI: 10.1007/s11099-006-0054-1
Low iron stress nutrition for evaluation of Fe-efficient genotype physiology, photosynthesis, and essential monoterpene oil(s) yield of Ocimum sanctum
- 1 Central Institute of Medicinal and Aromatic Plants, P.O. CIMAP, Lucknow, India
Genotypic variations were observed among 6 variants and an indigenous one as a control. An efficient genotype OCD(L) of Ocimum sanctum had the greatest content of chlorophylls [2.15 g kg-1(FM)], Chl a/b ratio of 1.86, net photosynthetic rate of 0.72 mg(CO2) m-2 s-1, and 1.56 % oil formation. Methyl chavicol formed 50.31 % of total oil in OSP-6 genotype, which had also maximum peroxidase activity [ΔOD 2.4 mg-1(protein)] and maximum production of eugenol (30.44 % of total oil). We found an oxido-reducible reaction of peroxidase and high bands of peroxidase isoenzymes in this OSP-6 genotype for the formation of monoterpene essential oil(s) and possibly the major constituents of eugenol through the high production of photosynthates.
Additional key words: chlorophyll; Cu; dry mass; Fe; leaf area; Mn; net photosynthetic rate; plant height; saccharides; Zn
Received: November 21, 2005; Accepted: February 2, 2006; Published: September 1, 2006 Show citation
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