scholarly journals Nitric oxide enhances salt secretion and Na+ sequestration in a mangrove plant, Avicennia marina, through increasing the expression of H+-ATPase and Na+/H+ antiporter under high salinity

2010 ◽  
Vol 30 (12) ◽  
pp. 1570-1585 ◽  
Author(s):  
J. Chen ◽  
Q. Xiao ◽  
F. Wu ◽  
X. Dong ◽  
J. He ◽  
...  
Keyword(s):  
Nitric Oxide ◽  
High Salinity ◽  
Avicennia Marina ◽  
Mangrove Plant ◽  
Salt Secretion

scholarly journals Nitric Oxide Mediates Root K+/Na+ Balance in a Mangrove Plant, Kandelia obovata, by Enhancing the Expression of AKT1-Type K+ Channel and Na+/H+ Antiporter under High Salinity

PLoS ONE ◽  
2013 ◽  
Vol 8 (8) ◽  
pp. e71543 ◽  
Author(s):  
Juan Chen ◽  
Duan-Ye Xiong ◽  
Wen-Hua Wang ◽  
Wen-Jun Hu ◽  
Martin Simon ◽  
...  
Keyword(s):  
Nitric Oxide ◽  
High Salinity ◽  
K Channel ◽  
Kandelia Obovata ◽  
Mangrove Plant ◽  
Type K

scholarly journals Antibacterial potential of biosynthesised silver nanoparticles using Avicennia marina mangrove plant

2011 ◽  
Vol 2 (2) ◽  
pp. 143-147 ◽  
Author(s):  
M. Gnanadesigan ◽  
M. Anand ◽  
S. Ravikumar ◽  
M. Maruthupandy ◽  
M. Syed Ali ◽  
...  
Keyword(s):  
Silver Nanoparticles ◽  
Avicennia Marina ◽  
Mangrove Plant ◽  
Antibacterial Potential

The Effect of Salt Stress on the Catabolism of Sugars in Leaves and Roots of a Mangrove Plant, Avicennia marina

1997 ◽  
Vol 52 (3-4) ◽  
pp. 187-192 ◽  
Author(s):  
Yuko Fukushima ◽  
Hamako Sasamoto ◽  
Shigeyuki Baba ◽  
Hiroshi Ashihara
Keyword(s):  
Malic Acid ◽  
Sea Water ◽  
Tca Cycle ◽  
Avicennia Marina ◽  
Salt Resistance ◽  
Pentose Phosphate ◽  
Neutral Fraction ◽  
Mangrove Plant ◽  
High Concentrations ◽  
Old Trees

Abstract Respiration and related aspects of metabolism were investigated in the roots and leaves of 2-year-old trees of the mangrove plant, Avicennia marina in the presence of 100, 250 and 500 mᴍ NaCl. The rate of respiration of leaves increased with increasing concentrations of NaCl in the incubation medium, but respiration of roots was not similarly affected. In order to examine the relative rates of catabolism of glucose by the glycolysis-tricarboxylic acid (TCA) cycle and the oxidative pentose phosphate pathway (PP pathway), we determined the rates of release of 14CO2 from [1-14C]glucose and from [ 6 -14C]glucose in segments of roots and leaves. The ratios of rates (C6/C1) in roots varied from 0.30 to 0.44, while ratios of 0.85 to 0.99 were obtained when leaves were incubated in the presence of various concentrations of NaCl. It appeared that the PP pathway was more involved in sugar catabolism in the roots than in the leaves of A. marina. Uniformaly 14C-labelled sucrose, incubated with segments of roots and leaves for 18 h, was converted to CO2, amino acids (mainly glutamine), organic acids (mainly malic acid), sugars and ethanol-insoluble macromolecules. The incorporation of radioactivity into most of these components was not significantly affected by NaCl. However, in leaves (but not in roots) the release of 14CO2 from [ U -14C]sucrose was en­ hanced by NaCl at 250 mᴍ and 500 mᴍ, while the rate of incorporation of radioactivity into macromolecules was reduced by high concentrations of NaCl. Incorporation of radioactivity from [ U -14C]sucrose into malic acid was enhanced in both roots and leaves by an increase in the concentration of NaCl from 100 mᴍ to 500 mᴍ (this concentrations is similar to that in sea water). Independent of the concentration of NaCl, more than half of the radioactivity in the neutral fraction from leaves was incorporated into an unidentified sugar, while in the same fraction from roots, the radioactivity was associated with glucose, fructose and sucrose. On the basis of these results, a discussion is presented of the characteristics of catabolism of sugars in A. marina in relation to salt resistance.

Compatible Solutes and Inorganic Ions in the Mangrove Plant Avicennia marina and Their Effects on the Activities of Enzymes

1997 ◽  
Vol 52 (7-8) ◽  
pp. 433-440 ◽  
Author(s):  
Hiroshi Ashihara ◽  
Kyoko Adachi ◽  
Miho Otawa ◽  
Eri Yasumoto ◽  
Yuko Fukushima ◽  
...  
Keyword(s):  
Compatible Solutes ◽  
Inorganic Ions ◽  
Avicennia Marina ◽  
Salt Resistance ◽  
Nmr Studies ◽  
Mangrove Plant ◽  
Young Leaves ◽  
High Concentrations ◽  
Fructose 1,6 Bisphosphate ◽  
Glucose 6 Phosphate Dehydrogenase

Naturally grown two-month-old seedlings of Avicennia marina contain high concentrations of Na+ and Cl-.+ Our NMR studies revealed an accumulation of glycinebetaine, asparagine and stachyose in A. marina. The highest concentration of glycinebetaine was observed in young leaves, while the distribution of stachyose was restricted in stems and roots. A sparagine comprised more than 96% of total free amino acids in roots and 84% in leaves from two-year-old plants. Little or no accumulation of proline or polyols, which are proposed as compatible solutes in other plants, could be detected in A. marina. The activities of phosphofructokinase, pyrophosphate:fructose-6-phosphate 1-phosphotransferase, glucose-6-phosphate dehydrogenase, 6-phosphogluconate dehydrogenase (decarboxylating), phosphoenolpyruvate carboxylase and NAD:malate dehydrogenase from young leaves of A. marina were inhibited by NaCl, while the activity of fructose-1,6-bisphosphate aldolase was activated by 50-200 m M NaCl. There was little or no effect of high concentrations (up to 500 mᴍ ) of glycinebetaine on the activities of any of these enzymes. No significant protection by glycinebetaine was detected against NaCl inhibition of these enzymatic activities. Based on these results, possible mechanisms for the salt-resistance of A. marina cells are discussed.

Cross-talk between salicylic acid and NaCl-generated reactive oxygen species and nitric oxide in tomato during acclimation to high salinity

2011 ◽  
Vol 142 (2) ◽  
pp. 179-192 ◽  
Author(s):  
Katalin Gémes ◽  
Péter Poór ◽  
Edit Horváth ◽  
Zsuzsanna Kolbert ◽  
Dóra Szopkó ◽  
...  
Keyword(s):  
Nitric Oxide ◽  
Reactive Oxygen Species ◽  
Salicylic Acid ◽  
Cross Talk ◽  
High Salinity ◽  
Reactive Oxygen ◽  
Oxygen Species

scholarly journals Nitric Oxide Involvement in Bermudagrass Response to Salt Stress

2016 ◽  
Vol 141 (5) ◽  
pp. 425-433 ◽  
Author(s):  
Ao Liu ◽  
Jibiao Fan ◽  
Margaret Mukami Gitau ◽  
Liang Chen ◽  
Jinmin Fu
Keyword(s):  
Nitric Oxide ◽  
Salt Stress ◽  
High Salinity ◽  
Ion Homeostasis ◽  
Damage Effect ◽  
Ionic Balance ◽  
Alkaline Soils ◽  
Membrane Injury ◽  
No Donor ◽  
Cell Membrane Stability

Bermudagrass [Cynodon dactylon (L.) Pers.] is a warm-season turfgrass that has the potential to improve saline and alkaline soils. However, its utilization is severely limited by high salinity. Therefore, it is urgent to enhance its tolerance to salt stress. Previous studies have proved that nitric oxide (NO) plays a vital role in various biological processes. However, the role of NO in bermudagrass response to salt is unknown. Our objective here was to investigate whether and how NO contributes to the protection of bermudagrass against salt stress in bermudagrass. In this study, sodium nitroprusside (SNP) served as the NO donor, while 2-phenyl-4,4,5,5-tetramentylimidazoline-l-oxyl-3-xide (PTIO) plus NG-nitro-L-arginine methyl ester (L-NAME) acted as the NO inhibitor. The treatment of bermudagrass with 400 mm salt solution occurred under different regimes: control, SNP, PTIO + L-NAME (PL). The results showed that 400 mm salinity caused significant toxicity to bermudagrass. However, SNP alleviated damage effect on plant growth and ionic balance as indicated by higher water content, chlorophyll content, higher chlorophyll a fluorescence (OJIP) curves and K+:Na+, Mg2+:Na+, and Ca2+:Na+ ratios. Also, lower levels of electrolyte leakage, malonaldehyde, H2O2, superoxide dismutase, peroxidase, and ascorbate peroxidase activities suggested that NO reduced the membrane injury and lipid peroxidation under salt treatment, while PL regime showed severe damage. In summary, our results suggest that NO has some beneficial effects on the maintenance of cell membrane stability, alleviation of oxidative damage and maintenance of ion homeostasis and plant photosythesis when bermudagrass is exposed to high salinity condition.

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