NDLI: Effect of sodium chloride-induced stress on growth, proline, glycine betaine accumulation, antioxidative defence and bacoside A content in in vitro regenerated shoots of Bacopa monnieri (L.) Pennell

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Effect of sodium chloride-induced stress on growth, proline, glycine betaine accumulation, antioxidative defence and bacoside A content in in vitro regenerated shoots of Bacopa monnieri (L.) Pennell

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Effect of sodium chloride-induced stress on growth, proline, glycine betaine accumulation, antioxidative defence and bacoside A content in in vitro regenerated shoots of Bacopa monnieri (L.) Pennell

Content Provider	Springer Nature Link
Author	Ahire, M. L. Walunj, P. R. Kishor, P. B. K. Nikam, T. D.
Copyright Year	2013
Abstract	Growth, osmotic adjustment, antioxidant enzyme defense and the principle medicinal component bacoside A were studied in the in vitro raised shoot cultures of Bacopa monnieri, a known medicinal plant, under different concentrations of NaCl [0.0 (control), 50, 100, 150 or 200 mM]. A sharp increase in Na$^{+}$ content was observed at 50 mM NaCl level and it was about 6.4-fold higher when compared with control. While Na$^{+}$ content increased in the shoots with increasing levels of NaCl in the medium, both K$^{+}$ and Ca$^{2+}$ concentrations decreased. Significant reduction was observed in shoot number per culture; shoot length, fresh weight (FW), dry weight (DW) and tissue water content (TWC) when shoots were exposed to increasing NaCl concentrations (50–200 mM) as compared with the control. Decrease in TWC was not significant at higher NaCl level (150 and 200 mM). At 200 mM NaCl, growth of shoots was adversely affected and microshoots died under prolonged stress. Minimum damage to the membrane as assessed by malondialdehyde (MDA) content was noticed in the controls in contrast to sharp increase of it in NaCl-stressed shoots. Higher amounts of free proline, glycinebetaine and total soluble sugars (TSS) accumulated in NaCl-stressed shoots indicating that it is a glycinebetaine accumulator. About 2.11-fold higher H$_{2}$O$_{2}$ content was observed at 50 mM NaCl as compared with control and it reached up to 7.1-folds more at 200 mM NaCl. Antioxidant enzyme activities (superoxide dismutase, catalase, ascorbate peroxidase and guaiacol peroxidase) also increased with a rise in NaCl level. Increase in bacoside A, a triterpene saponin content was observed only up to 100 mM NaCl level. Higher salt concentrations inhibited the accumulation of bacoside A. It appears from the data that accumulation of osmolytes, ions and elevated activities of antioxidant enzymes play an important role in osmotic adjustment in shoot cultures of Bacopa under salt stress.
Starting Page	1943
Ending Page	1953
Page Count	11
File Format	PDF
ISSN	01375881
Journal	Acta Physiologiae Plantarum
Volume Number	35
Issue Number	6
e-ISSN	18611664
Language	English
Publisher	Springer-Verlag
Publisher Date	2013-02-20
Publisher Place	Berlin, Heidelberg
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Antioxidant enzymes Bacopa monnieri Bacoside A Osmolyte accumulation Salinity Shoot cultures Plant Physiology Plant Genetics & Genomics Plant Biochemistry Plant Pathology Plant Anatomy/Development Agriculture
Content Type	Text
Resource Type	Article
Subject	Physiology Plant Science Agronomy and Crop Science

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Effect of sodium chloride-induced stress on growth, proline, glycine betaine accumulation, antioxidative defence and bacoside A content in in vitro regenerated shoots of Bacopa monnieri (L.) Pennell

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