Sodium uptake and transport regulation, and photosynthetic efficiency maintenance as the basis of differential salt tolerance in rice cultivars

2021 ◽  
Vol 192 ◽  
pp. 104654
Author(s):  
Cibelle Gomes Gadelha ◽  
Ítalo Antônio Cotta Coutinho ◽  
Sergimar Kennedy de Paiva Pinheiro ◽  
Emilio de Castro Miguel ◽  
Humberto Henrique de Carvalho ◽  
...  
Keyword(s):  
Salt Tolerance ◽  
Photosynthetic Efficiency ◽  
Rice Cultivars ◽  
Sodium Uptake ◽  
Transport Regulation ◽  
Uptake And Transport

Assessment of Salt Tolerance in Rice Cultivars in Response to Salinity Problems in California

Crop Science ◽  
1998 ◽  
Vol 38 (2) ◽  
pp. 394-398 ◽  
Author(s):  
M. C. Shannon ◽  
J. D. Rhoades ◽  
J. H. Draper ◽  
S. C. Scardaci ◽  
M. D. Spyres
Keyword(s):  
Salt Tolerance ◽  
Rice Cultivars

Salt Tolerance Potential of Some Selected Fine Rice Cultivars

2001 ◽  
Vol 1 (12) ◽  
pp. 1175-1177 ◽  
Author(s):  
G. Shabbir . ◽  
Nazir Hussain . ◽  
M. K. Bhatti . ◽  
Afzal Ahmad . ◽  
M. A. Javed . ◽  
...  
Keyword(s):  
Salt Tolerance ◽  
Rice Cultivars

scholarly journals Large-scale integrated evaluation of salt tolerance in japonica rice at the germination stage

2020 ◽  
Author(s):  
Xiu Jing ◽  
Ping Mi ◽  
Xianzhi Xie ◽  
Baoshan Wang
Keyword(s):  
Mathematical Model ◽  
Salt Stress ◽  
Salt Tolerance ◽  
Large Scale ◽  
Crop Yields ◽  
Japonica Rice ◽  
Rice Cultivars ◽  
Salt Tolerant ◽  
Fresh Weight ◽  
Germination Stage

Abstract Background: Salt stress, one of the most important abiotic stresses, severely reduces crop yields. Identifying salt-tolerant rice germplasm resources at the germination stage, developing salt tolerance indicators, and cultivating salt-tolerant rice cultivars are crucial for improving rice production in saline soil.Results: We measured the germination parameters of 140 japonica rice cultivars on the 7 day after sowing (DAS) in 0 and 150 mmol L−1 NaCl. To accurately assess salt tolerance and identify reliable indicators of salt tolerance, we measured the shoot length (SL), root length (RL), root fresh weight (RFW), shoot fresh weight (SFW), total fresh weight (TFW) and salt tolerance (STI) index after 7 days of salt-stress treatment. The 140 rice cultivars were divided into four categories based on the mean MFVs: highly salt tolerant (HST: 19 cultivars), salt tolerant (ST: 74 cultivars), weakly salt tolerant (WST: 43 cultivars), and salt sensitive (SS: 4 cultivars). Based on the physiological indicators, we established a mathematical model to accurately evaluate salt tolerance in japonica rice cultivars. STI of TFW under 150 mmol L−1 NaCl treatment showed the highest correlation with salt tolerance during the germination stage.Conclusions: We determined the optimum NaCl concentration (150 mmol L−1) for evaluating salt tolerance in japonica rice at the germination stage. We identified 19 HST, 74 ST, 43 WST, and 4 SS japonica rice cultivars during the germination stage and proposed a mathematical model to evaluate salt tolerance. STI of TFW is a reliable, accurate indicator for evaluating salt tolerance in japonica rice. These findings should greatly facilitate the evaluation of japonica rice cultivars during seed germination and the breeding of salt-tolerant rice cultivars.

scholarly journals Salt tolerance of mango rootstocks (Magnifera indica L. cv. Osteen)

2003 ◽  
Vol 1 (1) ◽  
pp. 68 ◽  
Author(s):  
V.H. Duran ◽  
A. Martinez Raya ◽  
J. Aguilar
Keyword(s):  
Water Quality ◽  
Electrical Conductivity ◽  
Salt Tolerance ◽  
Root System ◽  
Irrigation Water ◽  
Relative Tolerance ◽  
Na Ions ◽  
Uptake And Transport

The aim of this work was to establish the criteria to determine the relative tolerance of mango rootstocks (Mangiferaindica L.) to high Cl- and Na+ concentrations present in irrigation water. Two rootstocks, Gomera-1 and Gomera-3 grafted with the cultivar Osteen, were subjected to study. Grafted plants were exposed to salinized irrigation watersmeasured by electrical conductivity (1.02, 1.50, 2.00 and 2.50 dS m-1). Results indicated differences in retainingtoxic elements in different organs (roots, stem, or leaves) of both rootstocks. Gomera-3 was more sensitive as took uphigher amounts of Cl- and Na+ than Gomera-1. Gomera-1 was more tolerant, being the tolerance possibly associatedwith the capacity of this rootstock to restrict the uptake and transport of Cl- and Na+ ions from the root system to theaboveground parts. The Cl- ions were more toxic in rootstock and cultivar leaves, while the Na+ ions were more toxicin the roots. Therefore, the present study reveals that Gomera-1 proved to be the most adaptable rootstock to salineconditions, making it feasible for use in areas with low water quality.

scholarly journals Tolerance of Iron-Deficient and -Toxic Soil Conditions in Rice

Plants ◽  
2019 ◽  
Vol 8 (2) ◽  
pp. 31 ◽  
Author(s):  
Anumalla Mahender ◽  
B. Swamy ◽  
Annamalai Anandan ◽  
Jauhar Ali
Keyword(s):  
Fine Tuning ◽  
Fe Deficiency ◽  
Soil Conditions ◽  
Rice Cultivars ◽  
Rice Varieties ◽  
Genetic Traits ◽  
The Past ◽  
Iron Deficient ◽  
Fe Toxicity ◽  
Uptake And Transport

Iron (Fe) deficiency and toxicity are the most widely prevalent soil-related micronutrient disorders in rice (Oryza sativa L.). Progress in rice cultivars with improved tolerance has been hampered by a poor understanding of Fe availability in the soil, the transportation mechanism, and associated genetic factors for the tolerance of Fe toxicity soil (FTS) or Fe deficiency soil (FDS) conditions. In the past, through conventional breeding approaches, rice varieties were developed especially suitable for low- and high-pH soils, which indirectly helped the varieties to tolerate FTS and FDS conditions. Rice-Fe interactions in the external environment of soil, internal homeostasis, and transportation have been studied extensively in the past few decades. However, the molecular and physiological mechanisms of Fe uptake and transport need to be characterized in response to the tolerance of morpho-physiological traits under Fe-toxic and -deficient soil conditions, and these traits need to be well integrated into breeding programs. A deeper understanding of the several factors that influence Fe absorption, uptake, and transport from soil to root and above-ground organs under FDS and FTS is needed to develop tolerant rice cultivars with improved grain yield. Therefore, the objective of this review paper is to congregate the different phenotypic screening methodologies for prospecting tolerant rice varieties and their responsible genetic traits, and Fe homeostasis related to all the known quantitative trait loci (QTLs), genes, and transporters, which could offer enormous information to rice breeders and biotechnologists to develop rice cultivars tolerant of Fe toxicity or deficiency. The mechanism of Fe regulation and transport from soil to grain needs to be understood in a systematic manner along with the cascade of metabolomics steps that are involved in the development of rice varieties tolerant of FTS and FDS. Therefore, the integration of breeding with advanced genome sequencing and omics technologies allows for the fine-tuning of tolerant genotypes on the basis of molecular genetics, and the further identification of novel genes and transporters that are related to Fe regulation from FTS and FDS conditions is incredibly important to achieve further success in this aspect.

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