Alleviation of Adverse Effects of Salt Stress on Rice Seedlings by Exogenous Trehalose

2013 ◽  
Vol 5 (4) ◽  
pp. 405-415 ◽  
Author(s):  
P. Theerakulp ◽  
S. Phongngarm
Keyword(s):  
Salt Stress ◽  
Adverse Effects ◽  
Rice Seedlings

Melatonin Regulates Antioxidant Strategy in Response to Continuous Salt Stress in Rice Seedlings

2021 ◽  
Author(s):  
Feiyu Yan ◽  
Haimin Wei ◽  
Yanfeng Ding ◽  
Weiwei Li ◽  
Zhenghui Liu ◽  
...  
Keyword(s):  
Salt Stress ◽  
Rice Seedlings

scholarly journals Evaluation of reference genes for RT-qPCR studies in the leaves of rice seedlings under salt stress

2015 ◽  
Vol 14 (1) ◽  
pp. 2384-2398 ◽  
Author(s):  
G.P. Moraes ◽  
L.C. Benitez ◽  
M.N. do Amaral ◽  
I.L. Vighi ◽  
P.A. Auler ◽  
...  
Keyword(s):  
Salt Stress ◽  
Reference Genes ◽  
Rice Seedlings

scholarly journals Silicon ameliorates the adverse effects of salt stress on sainfoin (Onobrychis viciaefolia) seedlings

2017 ◽  
Vol 63 (No. 12) ◽  
pp. 545-551 ◽  
Author(s):  
Wu Guo-Qiang ◽  
Liu Hai-Long ◽  
Feng Rui-Jun ◽  
Wang Chun-Mei ◽  
Du Yong-Yong
Keyword(s):  
Salt Stress ◽  
Salt Tolerance ◽  
Adverse Effects ◽  
Plant Growth ◽  
Membrane Permeability ◽  
Chlorophyll Content ◽  
Salinity Stress ◽  
Soluble Sugars ◽  
Organic Solutes ◽  
Relative Membrane Permeability

The objective of this study was to investigate whether the application of silicon (Si) ameliorates the detrimental effects of salinity stress on sainfoin (Onobrychis viciaefolia). Three-week-old seedlings were exposed to 0 and 100 mmol/L NaCl with or without 1 mmol/L Si for 7 days. The results showed that salinity stress significantly reduced plant growth, shoot chlorophyll content and root K<sup>+</sup> concentration, but increased shoot malondialdehyde (MDA) concentration, relative membrane permeability (RMP) and Na<sup>+</sup> concentrations of shoot and root in sainfoin compared to the control (no added Si and NaCl). However, the addition of Si significantly enhanced growth, chlorophyll content of shoot, K<sup>+</sup> and soluble sugars accumulation in root, while it reduced shoot MDA concentration, RMP and Na<sup>+</sup> accumulation of shoot and root in plants under salt stress. It is clear that silicon ameliorates the adverse effects of salt stress on sainfoin by limiting Na<sup>+</sup> uptake and enhancing selectivity for K<sup>+</sup>, and by adjusting the levels of organic solutes. The present study provides physiological insights into understanding the roles of silicon in salt tolerance in sainfoin.

scholarly journals   Effects of exogenous proline and trehalose on physiological responses in rice seedlings during salt-stress and after recovery

2012 ◽  
Vol 58 (No. 7) ◽  
pp. 309-315 ◽  
Author(s):  
N. Nounjan ◽  
P. Theerakulpisut
Keyword(s):  
Antioxidant Enzymes ◽  
Salt Stress ◽  
Physiological Responses ◽  
Recovery Period ◽  
Growth Enhancement ◽  
Salt Tolerant ◽  
Rice Seedlings ◽  
Growth Recovery ◽  
Growth Increase ◽  
High Level

Two osmoprotectants (proline &ndash; Pro; trehalose &ndash; Tre) were exogenously supplied to seedlings of rice cvs. Pokkali (PK &ndash; salt-tolerant) and Khao Dawk Mali 105 (KDML105 &ndash; salt-sensitive) to investigate their effects on plants exposed to 200 mmol/L NaCl for 6 days and 5 days after recovery from stress. The reduction of growth, increase in Na<sup>+</sup> to K<sup>+</sup> ratio, high level of hydrogen peroxide (H<sub>2</sub>O<sub>2</sub>) content, enhanced activity of antioxidant enzymes (superoxide dismutase &ndash; SOD, peroxidase &ndash; POX, catalase &ndash; CAT and ascorbate peroxidase &ndash; APX) were observed in both rice cultivars under NaCl treatments. Exogenous Pro and Tre supplement to NaCl-stressed plants did not mitigate the reduction of growth during salt-stress. Nevertheless, during recovery plants previously supplied with Tre showed markedly higher percentage of growth recovery than those treated with NaCl alone or supplied with Pro. The beneficial effect of Tre on growth recovery was clearly demonstrated in KDML105 in which growth enhancement was related to reduction in Na<sup>+</sup> to K<sup>+</sup> ratio. Exogenous Pro was able to reduce H<sub>2</sub>O<sub>2</sub> in both cultivars during salt stress whereas Tre could reduce it only in KDML105. Exogenous Tre did not enhance any antioxidant enzymes during stress but enhanced APX activity in KDML105 during recovery. Exogenous Pro enhanced the activity of APX in PK, and POX, CAT and APX in KDML105 during both stress and recovery period. &nbsp; &nbsp;

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