Physiological and biochemical parameters for evaluation and clustering of rice cultivars differing in salt tolerance at seedling stage

Chunthaburee, Sumitahnun; Dongsansuk, Anoma; Sanitchon, Jirawat; Pattanagul, Wattana; Theerakulpisut, Piyada

doi:10.1016/j.sjbs.2015.05.013

Cited by 145 publications

(95 citation statements)

References 48 publications

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“…Single or combined element ratios were scattered in the 62 rice genotypes under control and salt stress conditions within each salt category compared to the standards. The data are in agreement with the findings of Chunthaburee et al [61] who used 12 rice cultivars including two of the standards used here, 'Pokkali' and 'IR29', in which K/Na ratio was only able to discriminate salt tolerance under salt stress conditions. This demonstrates the complexity of mechanism involved in salt tolerance and the difficulty in identifying a single criteria, see also Ashraf [62] and, Shahbaz and Ashraf [63].…”

Section: Validation Experimentssupporting

confidence: 92%

Prediction of Salt Tolerance in Rice (Oryza Sativa) Based on Shoot Ion Content under Non-Stressed Conditions

Bado¹,

Forster²,

Padilla-Álvarez³

et al. 2016

JMSE-A

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Salt is a major abiotic stress threatening crop plants such as rice. Tolerance to salt is complex and regulated by numerous genetic and non-genetic factors. To date most screens for salt tolerance rely on plant performance in stressed conditions. This article describes the ability to screen for salt tolerance in non-stressed conditions. The work is based on correlations between 62 rice genotypes in salt stress and non-stress conditions and measuring the intake of elements using Particle Induced X-ray Emission and X-ray Fluorescence. Roots and shoots were analysed though shoots provided easier and more robust materials to work with. Data were interpreted using multivariate statistical analysis which showed the intake ratio of elements across tolerant, moderately tolerant and susceptible rice genotypes. Tolerant genotypes exhibited a larger intake of elements, and a classification criteria based on Canonical Discriminant Analysis allowed differentiation of salt tolerant genotypes not only under salt stress but, significantly, also under non-stressed conditions. Thus, shoot element content in benign conditions can be used as an indicator for salt tolerance. These studies suggest that many salt tolerance mechanisms in rice cultivars are constitutive, they are not switched on by stress, and this has implications for physiological and genetic studies, especially in crop plants. The approach has practical application as it allows pre-screening in non-stressed conditions, from which candidate salt tolerant genotypes may be selected for subsequent testing in saline field conditions, selecting in benign conditions provides greater seed harvest of the next generation which can be used in multiple tests.

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Section: Validation Experimentssupporting

confidence: 92%

Prediction of Salt Tolerance in Rice (Oryza Sativa) Based on Shoot Ion Content under Non-Stressed Conditions

Bado¹,

Forster²,

Padilla-Álvarez³

et al. 2016

JMSE-A

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“…These findings are consistent with Tatar et al [41] who reported that salt stress significantly reduced the total dry matter of rice cultivars. Similarly, Chunthaburee et al [42] reported that salt stress significantly reduced both the fresh and dry weight of the salt-sensitive rice cultivar IR29 at the seedling stage. Salt stress is expected to negatively affect water absorption by seedling roots leading to osmotic stress, ion toxicity, and/or an ionic/nutritional imbalance [24].…”

Section: Discussionmentioning

confidence: 86%

Stomatal and Photosynthetic Traits Are Associated with Investigating Sodium Chloride Tolerance of Brassica napus L. Cultivars

Mohamed

Shalby

Bai

et al. 2020

Plants

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The negative effects of salt stress vary among different rapeseed cultivars. In this study, we investigated the sodium chloride tolerance among 10 rapeseed cultivars based on membership function values (MFV) and Euclidean cluster analyses by exposing seedlings to 0, 100, or 200 mM NaCl. The NaCl toxicity significantly reduced growth, biomass, endogenous K+ levels, relative water content and increased electrolyte leakage, soluble sugar levels, proline levels, and antioxidant enzyme activities. SPAD values were highly variable among rapeseed cultivars. We identified three divergent (tolerant, moderately tolerant, and sensitive) groups. We found that Hua6919 and Yunyoushuang2 were the most salt-tolerant cultivars and that Zhongshuang11 and Yangyou9 were the most salt-sensitive cultivars. The rapeseed cultivars were further subjected to photosynthetic gas exchange and anatomical trait analyses. Among the photosynthetic gas exchange and anatomical traits, the stomatal aperture was the most highly correlated with salinity tolerance in rapeseed cultivars and thus, is important for future studies that aim to improve salinity tolerance in rapeseed. Thus, we identified and characterized two salt-tolerant cultivars that will be useful for breeding programs that aim to develop salt-tolerant rapeseed.

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“…In a study by Kumar et al (2015), 52% and 14% of the total variation among 220 rice genotypes were distinguished using PCA. Similarly, Chunthaburee et al (2016) indicated that under salt stress condition the first two components contributed 72.04% of the total variability among rice genotypes. The 155 rice genotypes in this study were clustered into 4 groups under stress condition.…”

Section: Discussionmentioning

confidence: 93%

Selection for salinity tolerance in an international rice collection at vegetative stage

2019

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Water and soil salinity as the main abiotic stresses decrease crop yield and restrict the use of agricultural lands. In order to assess salt stress effect on seedling growth of rice and to select more tolerant rice genotypes, a factorial experiment was performed at two levels of NaCl namely non-stress (EC 1.2 dS m −1 ) and salt-stress (EC 10 dS m −1 ) in hydroponics with an international rice collection consisted of 155 varieties. Seven stress tolerance indices including STI, SSI, HM, RDI, SSPI, ATI and TOL were used to identify salt tolerant genotypes. The results of variance analysis showed that the effect of genotypes (G), Salt treatment (T) and G×T interaction were significant for all investigated traits (except for the effect of genotypes on shoot length). Under salt stress most genotypes showed similar trend of salt response, i.e. reduction in all traits. The results also revealed that dry weight (DW) was less affected than fresh weight (FW), and the shoot weight (SW) was affected more than the root weight (RW), indicating that shoot growth is more sensitive than root growth to salt stress. The Na + , K + and Na + :K + ratio were increased more than 713%, reduced 22% and increased more than 996% under salt stress, respectively. Four stress tolerance indices including MP, HM, GMP and STI showed highest correlation with each other and also with plant performance (Z-scores) under both normal and stress conditions; thus each of these indices can be used as the suitable indicators for screening salt tolerant genotypes. Based on the results, genotypes #84, #30 and #48 showed the highest performance and STI under salinity condition, so they have considerable potential to improve salt tolerance in rice breeding programs. In addition, genotypes #178, #198 and #6 with the lowest values of STI were found to be intolerant genotypes to salt stress.

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Physiological and biochemical parameters for evaluation and clustering of rice cultivars differing in salt tolerance at seedling stage

Cited by 145 publications

References 48 publications

Prediction of Salt Tolerance in Rice (Oryza Sativa) Based on Shoot Ion Content under Non-Stressed Conditions

Prediction of Salt Tolerance in Rice (Oryza Sativa) Based on Shoot Ion Content under Non-Stressed Conditions

Stomatal and Photosynthetic Traits Are Associated with Investigating Sodium Chloride Tolerance of Brassica napus L. Cultivars

Selection for salinity tolerance in an international rice collection at vegetative stage

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