Salinity induced oxidative stress and antioxidant system in salt-tolerant and salt-sensitive cultivars of rice (Oryza sativa L.)

2012 ◽  
Vol 22 (1) ◽  
pp. 27-34 ◽  
Author(s):  
Sheetal Chawla ◽  
Sunita Jain ◽  
Veena Jain
Keyword(s):  
Oxidative Stress ◽  
Oryza Sativa ◽  
Antioxidant System ◽  
Oryza Sativa L ◽  
Salt Tolerant

scholarly journals Reactive Oxygen Species (ROS) Metabolism and Nitric Oxide (NO) Content in Roots and Shoots of Rice (Oryza sativa L.) Plants under Arsenic-Induced Stress

Agronomy ◽  
2020 ◽  
Vol 10 (7) ◽  
pp. 1014 ◽  
Author(s):  
Ernestina Solórzano ◽  
Francisco J. Corpas ◽  
Salvador González-Gordo ◽  
José M. Palma
Keyword(s):  
Oxidative Stress ◽  
Nitric Oxide ◽  
Reactive Oxygen Species ◽  
Oryza Sativa ◽  
Oryza Sativa L ◽  
Reactive Oxygen ◽  
Oxygen Species ◽  
Antioxidative Systems ◽  
Ros Metabolism ◽  
As Stress

Arsenic (As) is a highly toxic metalloid for all forms of life including plants. Rice is the main food source for different countries worldwide, although it can take up high amounts of As in comparison with other crops, showing toxic profiles such as decreases in plant growth and yield. The induction of oxidative stress is the main process underlying arsenic toxicity in plants, including rice, due to an alteration of the reactive oxygen species (ROS) metabolism. The aim of this work was to gain better knowledge on how the ROS metabolism and its interaction with nitric oxide (NO) operate under As stress conditions in rice plants. Thus, physiological and ROS-related biochemical parameters in roots and shoots from rice (Oryza sativa L.) were studied under 50 μM arsenate (AsV) stress, and the involvement of the main antioxidative systems and NO in the response of plants to those conditions was investigated. A decrease of 51% in root length and 27% in plant biomass was observed with 50 μM AsV treatment, as compared to control plants. The results of the activity of superoxide dismutase (SOD) isozymes, catalase, peroxidase (POD: total and isoenzymatic), and the enzymes of the ascorbate–glutathione cycle, besides the ascorbate and glutathione contents, showed that As accumulation provoked an overall significant increase of most of them, but with different profiles depending on the plant organ, either root or shoot. Among the seven identified POD isozymes, the induction of the POD-3 in shoots under As stress could help to maintain the hydrogen peroxide (H2O2) redox homeostasis and compensate the loss of the ascorbate peroxidase (APX) activity in both roots and shoots. Lipid peroxidation was slightly increased in roots and shoots from As-treated plants. The H2O2 and NO contents were enhanced in roots and shoots against arsenic stress. In spite of the increase of most antioxidative systems, a mild oxidative stress situation appears to be consolidated overall, since the growth parameters and those from the oxidative damage could not be totally counteracted. In these conditions, the higher levels of H2O2 and NO suggest that signaling events are simultaneously occurring in the whole plant.

Differential expression of salt-responsive genes to salinity stress in salt-tolerant and salt-sensitive rice (Oryza sativa L.) at seedling stage

PROTOPLASMA ◽  
2018 ◽  
Vol 255 (6) ◽  
pp. 1667-1681 ◽  
Author(s):  
Vijayata Singh ◽  
Ajit Pal Singh ◽  
Jyoti Bhadoria ◽  
Jitender Giri ◽  
Jogendra Singh ◽  
...  
Keyword(s):  
Oryza Sativa ◽  
Differential Expression ◽  
Salinity Stress ◽  
Oryza Sativa L ◽  
Seedling Stage ◽  
Salt Tolerant

Exogenous calcium alleviates cadmium-induced oxidative stress in rice (Oryza sativa L.) seedlings by regulating the antioxidant defense and glyoxalase systems

2015 ◽  
Vol 39 (2) ◽  
pp. 393-407 ◽  
Author(s):  
Anisur Rahman ◽  
Mohammad Golam Mostofa ◽  
Kamrun Nahar ◽  
Mirza Hasanuzzaman ◽  
Masayuki Fujita
Keyword(s):  
Oxidative Stress ◽  
Oryza Sativa ◽  
Antioxidant Defense ◽  
Oryza Sativa L ◽  
Exogenous Calcium

Physiological characterisation and fine mapping of a salt-tolerant mutant in rice (Oryza sativa)

2015 ◽  
Vol 42 (11) ◽  
pp. 1026 ◽  
Author(s):  
Ping Deng ◽  
Dan Jiang ◽  
Yanmin Dong ◽  
Xingyu Shi ◽  
Wen Jing ◽  
...  
Keyword(s):  
Oryza Sativa ◽  
Salt Stress ◽  
Salt Tolerance ◽  
Oryza Sativa L ◽  
Recessive Gene ◽  
Nacl Stress ◽  
Shoot Biomass ◽  
Salt Tolerant ◽  
Candidate Locus ◽  
F2 Population

Salt-tolerant mutants are valuable resources for basic and applied research on plant salt tolerance. Here, we report the isolation and characterisation of a salt-tolerant rice (Oryza sativa L.) mutant. This mutant was identified from an ethyl methanesulfonate-induced Nipponbare mutant library, designated as rice salt tolerant 1 (rst1). The rst1 mutant was tolerant to salt stress and showed significantly higher shoot biomass and chlorophyll content, but lower lipid peroxidation and electrolyte leakage under NaCl stress. The improved salt tolerance of this mutant may be due mainly to its enhanced ability to restrict Na+ accumulation in shoots under salt stress conditions. Genetic analysis indicated that the salt tolerance of the rst1 mutant was controlled by a single recessive gene. Quantitative trait locus (QTL) mapping for salt tolerance was performed using an F2 population of rst1 × Peiai 64. Two QTLs were detected, in which the locus on chromosome 6 was determined to be the candidate locus of the rst1 gene. The rst1 locus was subsequently shown to reside within a 270.4-kb region defined by the markers IM29432 and IM29702. This result will be useful for map-based cloning of the rst1 gene and for marker-assisted breeding for salt tolerance in rice.

scholarly journals Characterization of Progenies from Intergeneric Hybridization Between Oryza sativa L. and Porteresia coarctata (Roxb.) Tateoka

2017 ◽  
Vol 27 (1) ◽  
pp. 63-76
Author(s):  
Tasmia Islam ◽  
Sudip Biswas ◽  
Umme Habiba Mita ◽  
RH Sarker ◽  
M Sazzadur Rahman ◽  
...  
Keyword(s):  
Oryza Sativa ◽  
Ssr Markers ◽  
Oryza Sativa L ◽  
Intergeneric Hybridization ◽  
Chromosome Loss ◽  
Salt Tolerant ◽  
Porteresia Coarctata ◽  
Maternal Parent ◽  
Hybrid Plants ◽  
Coastal Belt

Porteresia coarctata (Roxb.) Tateoka is an endemic halophyte growing all over the coastal belt of Bangladesh, propagating through rhizomes and setting a few ricelike grains. So exploiting the genetic potential of this wild rice as salt tolerant donor in possible wide crosses with rice (2n = 24) could be useful. We attempted intergeneric hybridization between Oryza sativa L. and P. coarctata. The survival rate of hybrid progenies in embryo culture was low but among them 2 hybrid plants were successfully matured from the intergeneric cross between the cultivated induced tetraploid of rice, Latisail (2n = 4x = 48) and P. coarctata (2n = 48). The hybrid plants could be successfully established in soil and were not like either of the parents in morphology although some of their features were similar to their maternal parent, Latisail (4x). Both of the hybrids were investigated through physiological analysis under salinity stress and molecular analyses with rice specific SSR markers. Molecular analysis of the F1 DNA with only 3 SSR markers, RM581, RM20224 and RM25271, out of 36 others tested, showed bands specific to both of the parents, while all had common bands with the maternal parent. Dendrogram analysis of the hybrids with the 36 SSR markers, show that P. coarctata forms a different clade and is clearly separated from Latisail and the hybrids. The putative hybrids however made a subgroup with Latisail. These observations could be possibly explained if chromosome loss of the paternal parent had occurred or may be it was a pleotropic effect of intergeneric hybridization. Physiological screening of the hybrid progenies at the F2 generation in seedling stage showed better result in leaf damage score (LDS) and salinity tolerance than their maternal parent Latisail (4x) at 150 mM salt stress for 10 days. F2 plants from one of the hybrid plants (H‐2) showed better performance but there was a large variation in response from each of the individual progenies. So, it is likely that some of the salt tolerant characteristics of the pollen parent might have been transferred to the recipient Latisail (4x). For introgression of better salt tolerant loci from P. coarctata, more wide hybrids will need to be produced and repeatedly crossed with P. coarctata.Plant Tissue Cult. & Biotech. 27(1): 63-76, 2017 (June)

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