Effect of Zn deficiency on net photosynthetic rate, 14C partitioning,and oil accumulation in leaves of peppermint |
| |
Authors: | Srivastava NK Misra A Sharma S |
| |
Institution: | (1) Central Institute of Medicinal and Aromatic Plants, P.O. Cimap, Lucknow-o[226015, India |
| |
Abstract: | Changes in growth, CO2 exchange rate, and distribution of photosynthetically fixed 14CO2 into the primary photosynthetic metabolic pool (sugars, amino acids and organic acids) and essential oil accumulation
were determined in leaves (leaf positions 1-6 from apex) of developing peppermint grown in a solution culture at Zn concentrations
of 0 and 0.05 g m-3. There was a significant decrease in 14C incorporation in total, ethanol-soluble and ethanol-insoluble fractions in Zn deficient plants at all leaf positions. 14C
incorporated in essential oil and in sugars were significantly higher in leaf pairs 1 to 3 than in leaf pairs 4 to 6. 14C incorporation into amino acids and organic acids was higher in all leaf pairs in Zn deficient plants. Statistical analysis
showed a positive significant association between Zn content of leaf and 14C incorporation into ethanol-soluble fraction and sugars and a negative correlation with 14C incorporation into amino acids and organic acids. Hence the content of sugars in leaves significantly influences essential
oil accumulation under Zn stress.
This revised version was published online in September 2006 with corrections to the Cover Date. |
| |
Keywords: | amino acids biomass chlorophyll 14CO2 and [U-14C] sucrose incorporation essential oils leaf development organic acids primary photosynthates sugars Zn-stress |
本文献已被 SpringerLink 等数据库收录! |