NDLI: Changes of soluble proteins in leaf and thylakoid exposed in high saline condition of a mangrove taxa Bruguiera gymnorrhiza

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Physiology and Molecular Biology of Plants : Volume 14

Changes of soluble proteins in leaf and thylakoid exposed in high saline condition of a mangrove taxa Bruguiera gymnorrhiza

Content Provider	Springer Nature Link
Author	Behera, Bishnupriya Das, Anath Bandhu Mohanty, Prasanna
Copyright Year	2009
Abstract	One-year-old seedlings of Bruguiera gymnorrhiza (L) Savingay were exposed to 500 mM NaCl for 6d under hydroponic culture condition to characterize the changes in leaf and thylakoid protein profiles in response to short-term salt exposures. Significant changes in leaf dry mass, chlorophylls and soluble leaf proteins were observed in short term of salt exposures, as it happens under tidal situations in nature. Chlorophyll a/b ratio showed decrease of light harvesting efficiency in salt treatment. Total soluble proteins in leaves were extracted from control and NaCl-treated plants at 2d intervals and were analyzed by SDS-PAGE. Intensity of several protein bands of different molecular mass of leaf protein profile ranging from 10 to 86 kDa (10, 16, 23, 33, 37, 42, 44, 50 and 86 kDa) were decreased due to high salt treatment. Out of these, 16, 23 and 33 kDa protein bands decreased dramatically from 1–3 fold but recovered in 7d growth, except the 33 kDa band. SDSPAGE profile of thylakoid protein revealed that both number and the intensity of several protein bands got altered by salt concentration. However, 33 kDa protein band of thylakoid reappeared in recovery that might not be of the same characteristics with same molecular mass as shown in total leaf protein profile. The numbers of major bands found in SDS-PAGE were reduced when analyzed in urea-SDS-PAGE to minimize protein aggregations by high salt. It was noted that 47 kDa disappeared while some proteins of apparent molecular mass like 23 kDa, 33 kDa, 37 kDa and 50 kDa degraded to minor bands. Partial restoration of protein bands occurred when the salt-treated plants were brought back to initial growth condition. These results clearly demonstrate that short term high salt concentration could cause major alterations to photosynthetic apparatus of a true non salt-secreting tree mangrove Bruguiera gymnorrhiza and adapted against fluctuation of salinity by altering leaf protein pool relatively more than the thylakoid proteins.
Starting Page	53
Ending Page	59
Page Count	7
File Format	PDF
ISSN	09715894
Journal	Physiology and Molecular Biology of Plants
Volume Number	15
Issue Number	1
e-ISSN	09740430
Language	English
Publisher	Springer-Verlag
Publisher Date	2009-05-14
Publisher Place	India
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Bruguiera gymnorrhiza Mangrove Polypeptides Salt shock Sodium chloride Thylakoid Cell Biology Biophysics/Biomedical Physics Plant Physiology Plant Sciences
Content Type	Text
Resource Type	Article
Subject	Physiology Plant Science Molecular Biology

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