Arsenic Stress Responses and Tolerance in Rice: Physiological, Cellular and Molecular Approaches

Rice consumption is a source of arsenic (As) exposure, which poses serious health risks. In this study, the accumulation of As in rice was studied. Research shows that As accumulation in rice in Taiwan and Bangladesh is higher than that in other countries. In addition, the critical factors influencing the uptake of As into rice crops are defined. Furthermore, determining the feasibility of using effective ways to reduce the accumulation of As in rice was studied. AsV and AsIII are transported to the root through phosphate transporters and nodulin 26-like intrinsic channels. The silicic acid transporter may have a vital role in the entry of methylated As, dimethylarsinic acid (DMA) and monomethylarsonic acid (MMA), into the root. Amongst As species, DMA(V) is particularly mobile in plants and can easily transfer from root to shoot. The OsPTR7 gene has a key role in moving DMA in the xylem or phloem. Soil properties can affect the uptake of As by plants. An increase in organic matter and in the concentrations of sulphur, iron, and manganese reduces the uptake of As by plants. Amongst the agronomic strategies in diminishing the uptake and accumulation of As in rice, using microalgae and bacteria is the most efficient.

show abstract

“…The average translocation factor for As is around 0.8, which is higher than the other crops, such as barley (0.2) and wheat (0.1) [52].…”

Section: Arsenic Species Translocation From Root To Shootmentioning

confidence: 77%

Arsenic Uptake and Accumulation Mechanisms in Rice Species

Abedi

Mojiri

2020

Plants

View full text Add to dashboard Cite

show abstract

“…The normal metabolism of oxygen in chloroplasts and mitochondria generates ROS, which is accelerated by the heavy metal content in the soil, and other environmental stresses [19,26]. ROS accumulation leads to lipid peroxidation and increased MDA levels [19,23].…”

Section: Discussionmentioning

confidence: 99%

Physiological, Biochemical and Molecular Responses of Barley Seedlings to Aluminum Stress

Zhang¹,

Tang²,

Tian³

et al. 2019

Phyton

View full text Add to dashboard Cite

Barley (Hordeum vulgare L.) is one of the most Aluminum (Al) sensitive cereal species. In this study, the physiological, biochemical, and molecular response of barley seedlings to Al treatment was examined to gain insight into Al response and tolerance mechanisms. The results showed that superoxide dismutase (SOD), peroxidase (POD) and catalase (CAT) activity were inhibited to different degrees following Al exposure. The MDA content also significantly increased with increasing Al concentrations. SRAP results indicated significant differences between Al treatments and controls in terms of SRAP profile, and the genomic template stability (GTS) decreased with increasing Al concentration and duration. These integrative results help to elucidate the underlying mechanisms that the barley response to Al toxicity.

show abstract

“…As a toxic metalloid, arsenic exerts deleterious effects on rice crops (Kalita et al, 2018). Owing to water logging and the reducing nature of rice fields during important times of the agricultural cycle, As 3+ is the most dominant species of arsenic affecting rice (Panaullah et al, 2009).…”

Section: Introductionmentioning

confidence: 99%

Screening of Some Traditional Rice Cultivars of Assam, India, for Their Response to Arsenic-Induced Abiotic Stress

Kalita

Tanti

2020

Acta Agrobot

Self Cite

View full text Add to dashboard Cite

Rice is the staple food of more than 700 million people in the world and the most important food crop in Assam, India. However, the metalloid arsenic, which is widespread in the groundwater of many parts of Assam, adversely affects the productivity of different crops, including rice. In this study, seedlings of 23 different traditional rice cultivars were subjected to 0.5 mg/L (low) and 0.8 mg/L (high) arsenic under hydroponic conditions, and various growth parameters (viz., relative water content, shoot length, root length, shoot fresh weight, root fresh weight, shoot dry weight, root dry weight, and chlorophyll a, chlorophyll b, and total chlorophyll content) were recorded. The cultivars showed varying degrees of susceptibility, as observed by the changes in the different morphological and physiological parameters under arsenic-induced stress. The calculated stress response indices revealed that the cultivar ‘Monasali’ had the best overall tolerance at the high arsenic concentration, whereas ‘Biyoi Sali,’ ‘Baismuthi,’ and ‘Bora’ were most susceptible. On the basis of these observations, ‘Monasali’ was determined as an arsenic-tolerant cultivar, but further biochemical and molecular studies are needed to verify this.

show abstract

Arsenic Stress Responses and Tolerance in Rice: Physiological, Cellular and Molecular Approaches

Cited by 89 publications

References 99 publications

Arsenic Uptake and Accumulation Mechanisms in Rice Species

Arsenic Uptake and Accumulation Mechanisms in Rice Species

Physiological, Biochemical and Molecular Responses of Barley Seedlings to Aluminum Stress

Screening of Some Traditional Rice Cultivars of Assam, India, for Their Response to Arsenic-Induced Abiotic Stress

Contact Info

Product

Resources

About