Salinity status of the 2011 Tohoku-oki tsunami affected agricultural lands in northeast Japan

Roy, Kushal; Sasada, Katsuhiro; Kohno, Eiichi

doi:10.1016/s2095-6339(15)30005-8

Cited by 19 publications

(14 citation statements)

References 3 publications

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“…The rapid global warming and sea level rise pose threats to rice yield and quality in South Asian rice-growing countries. In addition, a tsunami contaminated paddy field in Miyagi prefecture, Japan, with salt in 2011 [32,37,55]. Therefore, it is important to introgress genes/QTLs/SNPs conferring salt tolerance in locally grown popular rice cultivars, focusing on higher grain yield, to ensure food security under changing climatic conditions.…”

Section: Discussionmentioning

confidence: 99%

“…To combat earthquake- and tsunami-induced soil salinity in Japan, it is crucial to improve the salt resistance of locally grown popular rice cultivars, most of which are salt sensitive [32,36,37,38]. In addition, developing Japanese cultivars for international appeal and fine-tuning their yield performance under various ecosystems around the world are time-demanding tasks.…”

Section: Introductionmentioning

confidence: 99%

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Salt Tolerance Improvement in Rice through Efficient SNP Marker-Assisted Selection Coupled with Speed-Breeding

Rana

Takamatsu

Baslam

et al. 2019

IJMS

115

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Salinity critically limits rice metabolism, growth, and productivity worldwide. Improvement of the salt resistance of locally grown high-yielding cultivars is a slow process. The objective of this study was to develop a new salt-tolerant rice germplasm using speed-breeding. Here, we precisely introgressed the hst1 gene, transferring salinity tolerance from “Kaijin” into high-yielding “Yukinko-mai” (WT) rice through single nucleotide polymorphism (SNP) marker-assisted selection. Using a biotron speed-breeding technique, we developed a BC3F3 population, named “YNU31-2-4”, in six generations and 17 months. High-resolution genotyping by whole-genome sequencing revealed that the BC3F2 genome had 93.5% similarity to the WT and fixed only 2.7% of donor parent alleles. Functional annotation of BC3F2 variants along with field assessment data indicated that “YNU31-2-4” plants carrying the hst1 gene had similar agronomic traits to the WT under normal growth condition. “YNU31-2-4” seedlings subjected to salt stress (125 mM NaCl) had a significantly higher survival rate and increased shoot and root biomasses than the WT. At the tissue level, quantitative and electron probe microanalyzer studies indicated that “YNU31-2-4” seedlings avoided Na+ accumulation in shoots under salt stress. The “YNU31-2-4” plants showed an improved phenotype with significantly higher net CO2 assimilation and lower yield decline than WT under salt stress at the reproductive stage. “YNU31-2-4” is a potential candidate for a new rice cultivar that is highly tolerant to salt stress at the seedling and reproductive stages, and which might maintain yields under a changing global climate.

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Salt Tolerance Improvement in Rice through Efficient SNP Marker-Assisted Selection Coupled with Speed-Breeding

Rana

Takamatsu

Baslam

et al. 2019

IJMS

115

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“…This includes runoff associated with road-treating salts with consequent groundwater salinisation [93,96], hydrological alterations of waterways and changes in water quality [4,97,98], mining and agriculture [4], and movement of saltwater inland following storm surges, flash floods, rising sea level, and tsunamis [38–41]. For example, the consequences of tsunamis may extend to include the salinisation of coastal/inland fresh surface water, groundwater, and aquifers by means of intrusion, infiltration, and inundation [39,99,100]. It should be noted that our knowledge of both ecosystem and organism responses to alterations of water ionic quality and strength is not comprehensive [4,101] although increased salt toxicity is predicted to intensify [4,102,103].…”

Section: Resultsmentioning

confidence: 99%

Combined salinity and acidity stressors alterDaphnia magnapopulation growth and structure under severe absence of photoperiod

Purkiss

Hager

2019

Preprint

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Although natural and anthropogenic influences affect freshwater ecosystems globally at unprecedented levels, the effects of co-occurring physico-chemical stress on zooplankton phenotypic plasticity under extreme conditions remain understudied.We exposed a laboratory-raised clonal population of Daphnia magna to different stress levels of acidity and salinity undergoing complete constant light over 30 days. Overall, population size and age structure at day 10 considerably differed between specific stress contexts. All populations expanded compared to the starting population on day 1. On day 30, overall, population size increased but showed significant differences between treatment groups. Surprisingly, Daphnia performed better under combined stress of salinity and acidity than under acidity alone as the extra salinity in the medium may have counterbalanced sodium loss caused by lower pH. Our results reveal a considerable degree of differential reproductive and ontogenetic plasticity in response to combined stressors under disrupted photoperiod. Exposure to constant light led to increased population size, which may be a result of supercharged ion regulation that enables zooplankton to survive better under specific levels of extreme environmental change and adverse chemical stress. Our findings merit further molecular investigation of phenotypic plasticity of the congeners across severe combined stress conditions.

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“…The Mega-Tsunami that followed a magnitude 9.3 earthquake that struck off the coast of northeastern Japan in March 2011 damaged the coastal forest areas to different degrees [3]. Among the factors that affected the trees, the most significant ones were the physical impact of the incoming and outgoing waves [4], sea water residence in the soil [5,6], deposition of ocean sediments, and their chemical components in the soil [6][7][8]. Additionally, negative effects on the rhizosphere were caused by ground subsidence in relation to the deterioration of ground water drainage [6].…”

Section: Introductionmentioning

confidence: 99%

“…Considering the high water infiltration rate of these soils, salinization largely decreased during the first year after the tsunami because of high precipitation in this region as shown by Ono and Hirai [12]. In contrast, in agricultural areas of Miyagi Prefecture, where fine soils (clay, silt) are common, high salt concentration in the soil was still observed by the summer of 2012 [5].…”

Section: Introductionmentioning

confidence: 99%

Evaluation of the effect of the 2011 Tsunami on coastal forests by means of multiple isotopic analyses of tree-rings

Caceres

Nakano

Ferrio

et al. 2018

Isotopes in Environmental and Health Studies

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The March 2011 Mega-Tsunami in eastern Japan damaged at different degrees the black pine (Pinus thunbergii) forests along the coast. In order to evaluate the recovery of black pine four years later, tree-ring samples from 9 trees for the period 2002-2014 were analyzed for ring growth and stable isotopes (δC, δN and δO). The results showed that annual tree-ring width decreased approximately 70 % from the year 2011 to 2014 compared to the period previous to the tsunami (2002-2010). The multiple isotopic analyses showed that the reduction in growth was caused by soil salinity that prompted stomatal closure and an abrupt increase of tree-ring δC. Sea water deposition in the soil did not affect tree-ring δO values. Two years after the tsunami, decreasing tree-ring δC values caused by apparently photosynthetic recovery did not translate into radial tree-growth, indicating a possible shift in carbon allocation to foliage and mainly roots as a defense mechanism to sodium toxicity. The dual δC-δO model explains neither the limited growth nor the subsequent recovery in δC. Similarly tree-ring δN indicated that there was no difference in nitrogen availability before and after the tsunami, suggesting that nutrients were not a limitation but rather soil salinity.

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Salinity status of the 2011 Tohoku-oki tsunami affected agricultural lands in northeast Japan

Cited by 19 publications

References 3 publications

Salt Tolerance Improvement in Rice through Efficient SNP Marker-Assisted Selection Coupled with Speed-Breeding

Salt Tolerance Improvement in Rice through Efficient SNP Marker-Assisted Selection Coupled with Speed-Breeding

Combined salinity and acidity stressors alterDaphnia magnapopulation growth and structure under severe absence of photoperiod

Evaluation of the effect of the 2011 Tsunami on coastal forests by means of multiple isotopic analyses of tree-rings

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