Soil pH as a Phenotype Determinant in Humans: Proposing a Scientific Hypothesis

Barthakur, Inderjit Kaur

doi:10.4236/ojss.2018.81003

Cited by 6 publications

(3 citation statements)

References 36 publications

(25 reference statements)

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“…2012 , Baruah et al. 2013 , Barthakur 2018 ). In this region, bioavailable Fe is abundant leading to Fe toxicity as a major constraint affecting the annual yield ( Baruah et al.…”

Section: Introductionmentioning

confidence: 99%

Comparative Transcriptomics of Lowland Rice Varieties Uncovers Novel Candidate Genes for Adaptive Iron Excess Tolerance

Kar

Mai

Khalouf

et al. 2021

Plant and Cell Physiology

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Iron (Fe) toxicity is a major challenge for plant cultivation in acidic water-logged soil environments, where lowland rice is a major staple food crop. Only few studies addressed the molecular characterization of excess Fe tolerance in rice, and these highlight different mechanisms for Fe tolerance. Out of 16 lowland rice varieties we identified a pair of contrasting lines, Fe-tolerant Lachit and -susceptible Hacha. The two lines differed in their physiological and morphological responses to excess Fe, including leaf growth, leaf rolling, reactive oxygen species generation, Fe and metal contents. These responses were likely of genetic origin as they were mirrored by differential gene expression patterns, obtained through RNA-sequencing, and corresponding GO term enrichment in tolerant versus susceptible lines. 35 genes of the metal homeostasis category, mainly root-expressed, showed differential transcriptomic profiles suggestive of an induced tolerance mechanism. 22 out of these 35 metal homeostasis genes were present in selection sweep genomic regions, in breeding signatures and/or differentiated during rice domestication. These findings suggest that Fe excess tolerance is an important trait in the domestication of lowland rice, and the identified genes may further serve to design targeted Fe tolerance breeding of rice crops.

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“…2012 , Baruah et al. 2013 , Barthakur 2018 ). In this region, bioavailable Fe is abundant leading to Fe toxicity as a major constraint affecting the annual yield ( Baruah et al.…”

Section: Introductionmentioning

confidence: 99%

Comparative Transcriptomics of Lowland Rice Varieties Uncovers Novel Candidate Genes for Adaptive Iron Excess Tolerance

Kar

Mai

Khalouf

et al. 2021

Plant and Cell Physiology

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“…Fe toxicity is found under hypoxic conditions in Northeast India and in some parts of Africa. Northeast India has high potential for cultivation of diverse lowland rice varieties, however, its soils are strongly acidic with pH ranges from 5.5 to 5.1 (Barthakur, 2018). In this region, bio-available Fe is abundant leading to Fe toxicity as a major constraint affecting the annual yield (Baruah, Das, & Das, 2007).…”

Section: Introductionmentioning

confidence: 99%

Transcriptomic expression patterns of two contrasting lowland rice varieties reveal high iron stress tolerance

Kar

Khalouf

et al. 2020

Preprint

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analyzed the data; P.B. and H.-J.M. wrote the original draft; and H.-J.M., A.B., S.K.P., G.X., L.S. and P.B. reviewed and edited the article; P.B. acquired funding. Summary statementLowland rice varieties Hacha and Lachit were selected for contrasting abilities to cope with iron excess stress. Morphological and physiological phenotypes were mirrored by molecular transcriptome changes, indicating altered metal homeostasis in the root as an adaptive tolerance mechanism in Lachit. AbstractIron (Fe) toxicity is a major challenge for plant cultivation in acidic water-logged soil environments, where lowland rice is a major staple food crop. Only few studies addressed the molecular characterization of excess Fe tolerance in rice, and these highlight different mechanisms for Fe tolerance in the studied varieties.Here, we screened 16 lowland rice varieties for excess Fe stress growth responses to identify contrasting lines, Fe-tolerant Lachit and -susceptible Hacha. Hacha and Lachit differed in their physiological and morphological responses to excess Fe, including leaf growth, leaf rolling, reactive oxygen species generation, Fe and metal contents. These responses were mirrored by differential gene expression patterns, obtained through RNA-sequencing, and corresponding GO term enrichment in tolerant versus susceptible lines. From the comparative transcriptomic profiles between Lachit and Hacha in response to excess Fe stress, individual genes of the category metal homeostasis, mainly root-expressed, may contribute to the tolerance of Lachit. 22 out of these 35 metal homeostasis genes are present in selection sweep genomic regions, in breeding signatures and/or differentiated during rice domestication. These findings will serve to design targeted Fe tolerance breeding of rice crops.

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“…pH is one of the important chemical property of soil that regulates the normal growth of plants. Soil in North Eastern states of India is characterized by low pH which when culminates with high concentrationof Al, restricts plant growth and development due to the formation of complexes with intracellular substances and hence suppressing the plant metabolism (1). Reactive oxygen species (ROS) is induced by Al toxicity at low pH in plants and it is accompanied with the increase of lipid peroxidation.…”

Section: Introductionmentioning

confidence: 99%

Differential Loss of ROS homeostasis and activation of anti oxidative defense response in tea cultivar due to aluminum toxicity in acidic soil

Devi¹,

Saha²,

Panda³

2020

CTBP

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Tea plant is best known as an economically important crop, environment hardy and an Al hyper accumulator. North East India forms one of the largest tea producing regions of the world but 90% of its soil is acidic need. Acidic soil has got major influence on overall crop production, hence it is of utmost necessity to understand the mechanisms of tea plant to adapt to such inhospitable conditions. Through this present investigation we try to understand the changes after exposure to various Al concentrations in TS462 clone of Camellia sinensis [L.] in hydroponic solution.The repercussions were measured in terms of generation of reactive oxygen species (ROS) and anti-oxidative enzyme activity in both root and shoot tissues of tea plant. When rooted tea cuttings were raised in hydroponic culture containing 50μm, 250μm and 500μm of Al for 60 days, a constant increase in uptake of Al by roots with the increase dose was observed. The increase in Al uptake with dose, corroborated with the production of super oxide anion (O 2-) hydrogen peroxide (H 2 O 2) and malondialdehyde (MDA). These all repercussions led to an increment in activity of antioxidant machinery during the study showing that better antioxidative response is behind the relatively better tolerance capability of tea plants.

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Soil pH as a Phenotype Determinant in Humans: Proposing a Scientific Hypothesis

Cited by 6 publications

References 36 publications

Comparative Transcriptomics of Lowland Rice Varieties Uncovers Novel Candidate Genes for Adaptive Iron Excess Tolerance

Comparative Transcriptomics of Lowland Rice Varieties Uncovers Novel Candidate Genes for Adaptive Iron Excess Tolerance

Transcriptomic expression patterns of two contrasting lowland rice varieties reveal high iron stress tolerance

Differential Loss of ROS homeostasis and activation of anti oxidative defense response in tea cultivar due to aluminum toxicity in acidic soil

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