Chloroplast ultra structure, photosynthesis and enzyme activities in regenerated plants of Stevia rebaudiana (Bert.) Bertoni as influenced by copper sulphate in the medium.
Indian J Exp Biol
;
2014 Sept; 52(9): 898-904
Article
in English
| IMSEAR
| ID: sea-153778
ABSTRACT
Stevia rebaudiana (Bert.) Bertoni is an important medicinal plant used as noncaloric commercial sweetener. Plants regenerated with higher levels of copper sulphate in the medium exhibited enhanced activity of peroxidase and polyphenoloxidase (PPO) enzymes. Transmission electron microscopy (TEM) revealed increase in size and number of electron dense inclusions in the chloroplasts of plants regenerated at optimised level of copper sulphate (0.5µM) in the medium. There was decrease in chlorogenic acid (CGA) content. Chl-a-fluorescence transient pattern (OJIP) showed that the photosynthesis process was more efficient at 0.5µM CuSO4 in the medium.
Full text:
Available
Index:
IMSEAR (South-East Asia)
Main subject:
Photosynthesis
/
Chloroplasts
/
Copper Sulfate
/
Stevia
Language:
English
Journal:
Indian J Exp Biol
Year:
2014
Type:
Article
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