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- Title
Relationship between photosynthetic carbon metabolism and essential oil biogenesis in peppermint under Mn-stress1.
- Authors
Srivastava, N.K.; Luthra, R.
- Abstract
Changes in growth and yield parameters, and CO and (U-C) sucrose incorporation into the primary metabolic pool, and essential oil have been investigated under Mn-deficiency and subsequent recovery in , grown in solution culture. Under Mn-deficiency, CO exchange rate, total chlorophyll, total assimilatory area, plant dry weight, and essential oil yield were significantly reduced, whereas chlorophyll a/b ratio, leaf area ratio and leaf stem ratio significantly increased. In leaves of Mn-deficient plants, CO incorporation into the primary metabolic pool (ethanol-soluble and -insoluble) and essential oil were significantly lower, whereas (U-C) sucrose incorporation into these components was significantly higher as compared to the control. Among the primary metabolites, the label was maximum in sugars, followed by organic acids and amino acids. A higher label in these metabolites was, in general, observed in stems of Mn-deficient plants as compared to the control. Mn-deficient plants supplied with complete nutrient medium for 3 weeks exhibited partial recovery in growth and yield parameters, and essential oil biogenesis. Thus, under Mn-deficiency and subsequent recovery, the levels of primary photosynthetic metabolites and their partitioning between leaf and stem significantly influence essential oil biogenesis.
- Publication
Journal of Experimental Botany, 1994, Vol 45, Issue 8, p1127
- ISSN
0022-0957
- Publication type
Article