scholarly journals Genotypic Variation in Osmotic Stress Tolerance Among Rice Cultivars and Its Association with L-Type Lateral Root Development

2015 ◽  
Vol 18 (3) ◽  
pp. 246-253 ◽  
Author(s):  
Kyoko Toyofuku ◽  
Maya Matsunami ◽  
Atsushi Ogawa
Keyword(s):  
Osmotic Stress ◽  
Stress Tolerance ◽  
Root Development ◽  
Lateral Root ◽  
Genotypic Variation ◽  
Rice Cultivars ◽  
Lateral Root Development ◽  
Osmotic Stress Tolerance

Precursor processing by SBT3.8 and phytosulfokine signaling contribute to drought stress tolerance in Arabidopsis

2021 ◽  
Author(s):  
Nils Stührwohldt ◽  
Eric Bühler ◽  
Margret Sauter ◽  
Andreas Schaller
Keyword(s):  
Drought Stress ◽  
Osmotic Stress ◽  
Stress Tolerance ◽  
Serine Proteases ◽  
Loss Of Function ◽  
Lateral Root Development ◽  
Osmotic Stress Tolerance ◽  
Stress Symptoms ◽  
C Terminus ◽  
Peptide Precursor

Abstract Increasing drought stress poses a severe threat to agricultural productivity. Plants, however, evolved numerous mechanisms to cope with such environmental stress. Here we report that the stress-induced production of a peptide signal contributes to stress tolerance. The expression of phytosulfokine (PSK) peptide precursor genes, and transcripts of three subtilisin-like serine proteases, SBT1.4, SBT3.7 and SBT3.8 were found to be up-regulated in response to osmotic stress. Stress symptoms were enhanced in sbt3.8 loss-of-function mutants and could be alleviated by PSK treatment. Osmotic stress tolerance was improved in plants overexpressing the precursor of PSK1 (proPSK1) or SBT3.8 resulting in higher fresh weight and improved lateral root development in the transgenic compared to wild-type plants. We further showed that SBT3.8 is involved in the biogenesis of the bioactive PSK peptide. ProPSK1 was cleaved by SBT3.8 at the C-terminus of the PSK pentapeptide. Processing by SBT3.8 depended on the aspartic acid residue directly following the cleavage site. ProPSK1 processing was impaired in the sbt3.8 mutant. The data suggest that increased expression in response to osmotic stress followed by the post-translational processing of proPSK1 by SBT3.8 leads to the production of PSK as a peptide signal for stress mitigation.

PP2A mediates lateral root development under NaCl-induced osmotic stress throughout auxin redistribution in Arabidopsis thaliana

2012 ◽  
Vol 368 (1-2) ◽  
pp. 591-602 ◽  
Author(s):  
Mauricio Nahuam Chávez-Avilés ◽  
Claudia Lizeth Andrade-Pérez ◽  
Homero Reyes de la Cruz
Keyword(s):  
Arabidopsis Thaliana ◽  
Osmotic Stress ◽  
Root Development ◽  
Lateral Root ◽  
Lateral Root Development ◽  
Auxin Redistribution

Genetic diversity based on osmotic stress tolerance-related morpho-physiological traits and molecular markers in traditional rice cultivars

Biologia ◽  
2020 ◽  
Vol 75 (5) ◽  
pp. 669-679
Author(s):  
Shamsun Nahar ◽  
Lipika Lahkar ◽  
Md Aminul Islam ◽  
Debanjali Saikia ◽  
Zina Moni Shandilya ◽  
...  
Keyword(s):  
Genetic Diversity ◽  
Molecular Markers ◽  
Osmotic Stress ◽  
Stress Tolerance ◽  
Physiological Traits ◽  
Rice Cultivars ◽  
Osmotic Stress Tolerance ◽  
Traditional Rice

Developing a Screening Tool for Osmotic Stress Tolerance Classification of Rice Cultivars Based on In Vitro Seed Germination

Crop Science ◽  
2016 ◽  
Vol 57 (1) ◽  
pp. 387-394 ◽  
Author(s):  
Bhupinder Singh ◽  
K. Raja Reddy ◽  
Edilberto D. Redoña ◽  
Timothy Walker
Keyword(s):  
Seed Germination ◽  
Osmotic Stress ◽  
Stress Tolerance ◽  
Screening Tool ◽  
Rice Cultivars ◽  
Osmotic Stress Tolerance

scholarly journals Precursor processing by SBT3.8 and phytosulfokine signaling contribute to drought stress tolerance in Arabidopsis

2020 ◽  
Author(s):  
Nils Stührwohldt ◽  
Eric Bühler ◽  
Margret Sauter ◽  
Andreas Schaller
Keyword(s):  
Drought Stress ◽  
Osmotic Stress ◽  
Stress Tolerance ◽  
Serine Proteases ◽  
Loss Of Function ◽  
Lateral Root Development ◽  
Osmotic Stress Tolerance ◽  
Stress Symptoms ◽  
C Terminus ◽  
Peptide Precursor

AbstractIncreasing drought stress poses a severe threat to agricultural productivity. Plants, however, evolved numerous mechanisms to cope with such environmental stress. Here we report that the stress-induced production of a peptide signal contributes to stress tolerance. The expression of phytosulfokine (PSK) peptide precursor genes, and transcripts of three subtilisin-like serine proteases, SBT1.4, SBT3.7 and SBT3.8 were found to be up-regulated in response to osmotic stress. Stress symptoms were enhanced in sbt3.8 loss-of-function mutants and could be alleviated by PSK treatment. Osmotic stress tolerance was improved in plants overexpression the precursor of PSK1 (proPSK1) or SBT3.8 resulting in higher fresh weight and improved lateral root development in the transgenic compared to wild-type plants. We further showed that SBT3.8 is involved in the biogenesis of the bioactive PSK peptide. ProPSK1 was cleaved by SBT3.8 at the C-terminus of the PSK pentapeptide. Processing by SBT3.8 depended on the aspartic acid residue adjacent to the cleavage site. ProPSK1 processing was impaired in the sbt3.8 mutant. The data suggest that increased expression in response to osmotic stress followed by the post-translational processing of proPSK1 by SBT3.8 leads to the production of PSK as a peptide signal for stress mitigation.HighlightThe expression of phytosulfokine precursor genes and processing by the subtilase SBT3.8 are upregulated in response to osmotic stress for improved drought tolerance in Arabidopsis.

Stomatal conductance as a screen for osmotic stress tolerance in durum wheat growing in saline soil

2010 ◽  
Vol 37 (3) ◽  
pp. 255 ◽  
Author(s):  
Afrasyab Rahnama ◽  
Richard A. James ◽  
Kazem Poustini ◽  
Rana Munns
Keyword(s):  
Stomatal Conductance ◽  
Osmotic Stress ◽  
Durum Wheat ◽  
Stress Tolerance ◽  
Triticum Turgidum ◽  
Genotypic Variation ◽  
Relative Size ◽  
Shoot Biomass ◽  
Osmotic Stress Tolerance ◽  
The Difference

The change in stomatal conductance measured soon after durum wheat (Triticum turgidum ssp. durum Desf.) was exposed to salinity was verified as an indicator of osmotic stress tolerance. It was a reliable and useful screening technique for identifying genotypic variation. The minimum NaCl treatment needed to obtain a significant stomatal response was 50 mM, but 150 mM was needed to obtain significant differences between genotypes. The response to the NaCl was osmotic rather than Na+-specific. Stomatal conductance responded similarly to iso-osmotic concentrations of KCl and NaCl, both in the speed and extent of closure, and in the difference between genotypes. The new reduced rate of stomatal conductance in response to addition of 50 mM NaCl or KCl occurred within 45 min, and was independent of the concentration of Na+ in leaves. The difference between genotypes was long-lasting, translating into differences in shoot biomass and tiller number after a month. These results indicate that the relative size of the change in stomatal conductance when the salinity is introduced could be a means of screening for osmotic stress tolerance in wheat and other cereals.

scholarly journals Genotypic Variations in Responses of Lateral Root Development to Transient Moisture Stresses in Rice Cultivars

2008 ◽  
Vol 11 (3) ◽  
pp. 324-335 ◽  
Author(s):  
Roel R. Suralta ◽  
Yoshiaki Inukai ◽  
Akira Yamauchi
Keyword(s):  
Root Development ◽  
Lateral Root ◽  
Rice Cultivars ◽  
Lateral Root Development
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