Genetic Diversity, Salinity Tolerance and Physiological Responses to NaCl of Six Rice (Oryza sativa L.) Cultivars

Theerakulpisut, Piyada; Bunnag, S.; Kong-ngern, Kanlaya

doi:10.3923/ajps.2005.562.573

Cited by 26 publications

(7 citation statements)

References 29 publications

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“…In barley, the QTLs for proline accumulation under stress and for stress tolerance were not linked (Fan et al, 2015). In rice, salt-sensitive accessions accumulated higher levels of Na + and proline compared to salt-tolerant accessions (Lutts et al, 1999;Vaidyanathan et al, 2003;Theerakulpisut et al, 2005). Therefore, although proline accumulation does occur in sorghum in response to NaCl, our results suggest that it is not an accurate predictor of protective capacity against stress injury.…”

Section: Physiological Responses To Salinity Stressmentioning

confidence: 64%

Phenotypic and physiological responses to salt exposure in Sorghum reveal diversity among domesticated landraces

Henderson

Crim

Cumming

et al. 2020

American J of Botany

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Soil salinity negatively impacts plant function, development, and yield. Sorghum bicolor is a staple crop known to be drought tolerant, to have adapted to a variety of conditions, and to contain significant standing genetic diversity, making it an exemplary species to study phenotypic and physiological variation in salinity tolerance. In our study, a diverse group of sorghum landraces and accessions was first rank-ordered for salinity tolerance and then individuals spanning a wide range of response were analyzed for foliar proline and ion accumulation. We found that, while proline is often a good indicator of osmotic adjustment and is historically associated with increased salt tolerance, proline accumulation in sorghum reflects stress-response injury rather than acclimation. When combining ion profiles with growth responses and stress tolerance indices, the variation observed in tolerance was similarly not a sole result of Na + accumulation, but rather reflected accession-specific mechanisms that may integrate these and other metabolic responses. When we compared variation in tolerance to phylogenetic relationships, we conclude that the most parsimonious explanation for the variation observed among accessions is that salinity tolerance was acquired early during domestication and was subsequently maintained or lost in diverged lineages during improvement in areas that vary in soil salinity.

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Section: Physiological Responses To Salinity Stressmentioning

confidence: 64%

Phenotypic and physiological responses to salt exposure in Sorghum reveal diversity among domesticated landraces

Henderson

Crim

Cumming

et al. 2020

American J of Botany

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“…Physiological characters which have usually been used for screening rice cultivars for salinity tolerance at the seedling stage included plant survival, plant dried weight, leaf injury and Na + /K + ratio (Gregorio et al 1997;Ali et al 2004;Bhowmik et al 2009;Haq et al 2009). Recently, several authors found that salt-susceptible rice cultivars accumulated higher level of proline under salt stress than the salt-tolerant ones (Renuka Devi et al 1996;Demiral and Türkan, 2005;Theerakulpisut et al 2005).…”

Section: Introductionmentioning

confidence: 98%

Genetic diversity analysis of rice cultivars (Oryza sativa L.) differing in salinity tolerance based on RAPD and SSR markers

Kanawapee¹,

Sanitchon²,

Srihaban³

et al. 2011

Electro Journal of Biotech

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Thirty rice cultivars were evaluated for salinity tolerance during the seedling stage and were divided into five tolerance groups including tolerant (T), moderately tolerant (MT), moderately susceptible (MS), susceptible (S) and highly susceptible (HS) which comprised 5, 10, 9, 4 and 2 cultivars respectively. Genetic diversity of all rice cultivars was evaluated using random amplified polymorphic DNA (RAPD) and simple sequence repeats (SSR) markers. The cultivars were evaluated for polymorphisms after amplification with 20 random decamer primers and 20 SSR primer pairs. A total of 161 RAPD markers and 190 SSR alleles were produced which revealed 68.94% and 89.47% polymorphism respectively. Mean genetic similarity coefficient was 0.82 for RAPD and 0.70 for SSR. Cluster analysis based on RAPD markers was effective in grouping cultivars based on their salt tolerance ability. Group IA1, IB and IV contained three T, three S and two HS rice cultivars respectively. The MT and MS cultivars which showed similar physiological responses to salinity were resolved into two groups: Group IA2 and Group II comprising ten and eight MT/MS cultivars respectively. Cluster analysis based on SSR markers separated rice cultivars into groups based on genetic relatedness which did not correspond to salinity tolerance level. The results from this study provided some useful implications for salt tolerance breeding programs. The evaluation of genetic similarity and cluster analysis together with salt tolerance ability provides some useful guides for assisting plant breeders in selecting suitable genetically diverse parents for the crossing program.

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“…This result comes in consistent with previous ones (Romero-Aranda et al., 2001;Carpic et al, 2010). Theerakulpisut et al, 2005 stated that the weight of shoots and roots showed high correlation with the level of salinity. Ashraf, 2002, mentioned that the reduction in seedling fresh and dry weight is due to decreasing water uptake by seedlings in salt stress presence.…”

Section: Wwwccsenetorg/jasmentioning

confidence: 99%

“…Suplick-Ploense et al, 2002, stated that tolerant cultivars of bluegrass showed less growth reduction than sensitive genotypes under salinized conditions. Also, Theerakulpisut et al, 2005, mentioned that the magnitude of changes in some physiological parameters were different among different cultivars and were related to the level of salinity.…”

Section: Wwwccsenetorg/jasmentioning

confidence: 99%

“…The response to salinity varies with growth stages, varieties/ genotypes, and of salinization (Alam et al, 2004;Theerakulpisut et al, 2005;and Guan et al, 2010). Several investigators have stated that salt exerts negative effect on seed germination and seedling growth (Feizi et al, 2007;Azza et al, 2007;Abbad et al, 2004;Akbari et al, 2007).…”

Section: Introductionmentioning

confidence: 99%

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Salt Tolerance Study of Six Cultivars of Rice (Oryza sativa L.) During Germination and Early Seedling Growth

Abbas¹,

Ali²,

Hasan³

et al. 2012

JAS

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Salinity is one of the major threats facing the cultivation of field crops. The response of six rice (Oryza sativus L.) cultivars to different sodium chloride levels; 0, 30, 60, 90, 120, and 150 mM were investigated during germination and early seedling stages. Germination percent, mean germination time (MGT), shoot and root length and dry weight were all decreased as the levels of NaCl used increased. Percent reduction in dry weight over control was increased as the NaCl levels increased. Forat and Amber 33 were more salt tolerant cultivars with regard to germination percent, while Hwazawi cultivar was more sensitive. Hwazawi cultivar recorded the lower MGT while Amber 33 cultivar showed the higher MGT. Length of radicle and plumule of all cultivars were differently affected by salt, as Hwazawi and Mushkab cultivars showed more reduction in length while Amber 33 was less affected. Forat cultivar dry weight was more affected by salt compare to other cultivars. The effect of NaCl on salt tolerance index of cultivars was significant. The ranges of salt tolerance indices among salt levels were very wide, ranging from 95.42 at 30 mM of NaCl to 71.38 at 150 mM of NaCl. Interaction between salt levels and cultivars showed varying degree of differences. It is concluded that the different cultivars differ in their salt tolerance with respect to seed germination and seedling growth.

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Genetic Diversity, Salinity Tolerance and Physiological Responses to NaCl of Six Rice (Oryza sativa L.) Cultivars

Cited by 26 publications

References 29 publications

Phenotypic and physiological responses to salt exposure in Sorghum reveal diversity among domesticated landraces

Phenotypic and physiological responses to salt exposure in Sorghum reveal diversity among domesticated landraces

Genetic diversity analysis of rice cultivars (Oryza sativa L.) differing in salinity tolerance based on RAPD and SSR markers

Salt Tolerance Study of Six Cultivars of Rice (Oryza sativa L.) During Germination and Early Seedling Growth

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