scholarly journals Leaf Cuticular Wax, a Trait for Multiple Stress Resistance in Crop Plants

2019 ◽  
Author(s):  
Kunhikrishnan H. Dhanyalakshmi ◽  
Raju Y. Soolanayakanahally ◽  
Tawhidur Rahman ◽  
Karen K. Tanino ◽  
Karaba N. Nataraja
Keyword(s):  
Stress Resistance ◽  
Crop Plants ◽  
Cuticular Wax ◽  
Multiple Stress

Marker-Assisted Breeding for Stress Resistance in Crop Plants

2013 ◽  
pp. 387-426 ◽  
Author(s):  
Jogeswar Panigrahi ◽  
Ramya Ranjan Mishra ◽  
Alok Ranjan Sahu ◽  
Sobha Chandra Rath ◽  
Chitta Ranjan Kole
Keyword(s):  
Stress Resistance ◽  
Crop Plants ◽  
Marker Assisted Breeding

Multiple Stress Resistance in Pressure Resistant Escherichia coli Mutants

1999 ◽  
pp. 31-34
Author(s):  
K. Hauben ◽  
T. Nyström ◽  
A. Farewell ◽  
C. Michiels
Keyword(s):  
Escherichia Coli ◽  
Stress Resistance ◽  
Multiple Stress

scholarly journals Disruption of mitochondrial dynamics increases stress resistance through activation of multiple stress response pathways

2020 ◽  
Vol 34 (6) ◽  
pp. 8475-8492 ◽  
Author(s):  
Emily Machiela ◽  
Thomas Liontis ◽  
Dylan J. Dues ◽  
Paige D. Rudich ◽  
Annika Traa ◽  
...  
Keyword(s):  
Stress Response ◽  
Stress Resistance ◽  
Mitochondrial Dynamics ◽  
Multiple Stress

Physiological characterization and gene mapping of a novel cuticular wax-related mutant in barley

2020 ◽  
Author(s):  
Yunxia Fang ◽  
Xiaoqin Zhang ◽  
Tao Tong ◽  
Ziling Zhang ◽  
Bin Tian ◽  
...  
Keyword(s):  
Stress Resistance ◽  
Self Assembly ◽  
Nuclear Gene ◽  
Cuticular Wax ◽  
Chromosome 2 ◽  
Cuticular Waxes ◽  
Physiological Characterization ◽  
Assembly Mechanism ◽  
Specific Locus ◽  
Type Water

Abstract Background: Cuticular wax is a type of lipid covering the surface of plants, which is directly related to crop stress resistance. Thus, it is important to study wax-related genes and their regulatory mechanism in wax biosynthesis pathway for improving stress resistance.Results: In this study, a wax-deficient barley mutant barley cuticular wax1（bcw1）was identified, and genetic analysis indicated that the trait was controlled by a single recessive nuclear gene. Phenotype observations showed that the tubule-shaped waxy crystals covering the sheath and stem epidermis of mutants disappeared, but there was no significant differences were detected in the leaf epidermis between mutant and wild type. Water loss data confirmed that the cuticular waxes and cutins improved plant resistance to drought stress. By combining the bulk segregant analysis (BSA) and specific locus amplified fragment sequencing (SLAF-seq) strategy, the wax-related gene BCW1 was located on chromosome 2 with a total length of 15.10 Mb. No cuticular wax-related genes have been reported in the regions, indicating that BCW1 is a novel gene that plays roles in cuticular wax biosynthesis and wax crystals formation.Conclusions: The research showed that mutation of BCW1 did not affect the crystal shape or cutin formation outside the leaf surfaces, but decreased the wax and cutin accumulation outside stems and sheaths. Therefore, our work provides the basis for the cloning of BCW1 and studying of the crystal self-assembly mechanism.

scholarly journals Global Analysis of the General Stress Response ofBacillus subtilis

2001 ◽  
Vol 183 (19) ◽  
pp. 5617-5631 ◽  
Author(s):  
Anja Petersohn ◽  
Matthias Brigulla ◽  
Stefan Haas ◽  
Jörg D. Hoheisel ◽  
Uwe Völker ◽  
...  
Keyword(s):  
Stress Response ◽  
Stress Resistance ◽  
Sigma Factor ◽  
Global Analysis ◽  
Transcriptional Analysis ◽  
Ethanol Stress ◽  
General Stress Response ◽  
Multiple Stress ◽  
Stress Genes ◽  
General Stress

ABSTRACT Gene arrays containing all currently known open reading frames ofBacillus subtilis were used to examine the general stress response of Bacillus. By proteomics, transcriptional analysis, transposon mutagenesis, and consensus promoter-based screening, 75 genes had previously been described as ςB-dependent general stress genes. The present gene array-based analysis confirmed 62 of these already known general stress genes and detected 63 additional genes subject to control by the stress sigma factor ςB. At least 24 of these 125 ςB-dependent genes seemed to be subject to a second, ςB-independent stress induction mechanism. Therefore, this transcriptional profiling revealed almost four times as many regulon members as the proteomic approach, but failure of confirmation of all known members of the ςB regulon indicates that even this approach has not yet elucidated the entire regulon. Most of the ςB-dependent general stress proteins are probably located in the cytoplasm, but 25 contain at least one membrane-spanning domain, and at least 6 proteins appear to be secreted. The functions of most of the newly described genes are still unknown. However, their classification as ςB-dependent stress genes argues that their products most likely perform functions in stress management and help to provide the nongrowing cell with multiple stress resistance. A comprehensive screening program analyzing the multiple stress resistance of mutants with mutations in single stress genes is in progress. The first results of this program, showing the diminished salt resistance of yjbC and yjbD mutants compared to that of the wild type, are presented. Only a few new ςB-dependent proteins with already known functions were found, among them SodA, encoding a superoxide dismutase. In addition to analysis of the ςB-dependent general stress regulon, a comprehensive list of genes induced by heat, salt, or ethanol stress in a ςB-independent manner is presented. Perhaps the most interesting of the ςB-independent stress phenomena was the induction of the extracytoplasmic function sigma factor ςW and its entire regulon by salt shock.

scholarly journals Expression of the ςB-Dependent General Stress Regulon Confers Multiple Stress Resistance inBacillus subtilis

1999 ◽  
Vol 181 (13) ◽  
pp. 3942-3948 ◽  
Author(s):  
Uwe Völker ◽  
Björn Maul ◽  
Michael Hecker
Keyword(s):  
Stress Resistance ◽  
Stress Proteins ◽  
Natural Ecosystem ◽  
Wild Type ◽  
Multiple Stress ◽  
General Stress ◽  
Stress Survival ◽  
Energy Limitation ◽  
Starvation Survival ◽  
The Impact

ABSTRACT The alternative sigma factor ςB of Bacillus subtilis is required for the induction of approximately 100 genes after the imposition of a whole range of stresses and energy limitation. In this study, we investigated the impact of a null mutation in sigB on the stress and starvation survival ofB. subtilis. sigB mutants which failed to induce the regulon following stress displayed an at least 50- to 100-fold decrease in survival of severe heat (54°C) or ethanol (9%) shock, salt (10%) stress, and acid (pH 4.3) stress, as well as freezing and desiccation, compared to the wild type. Preloading cells with ςB-dependent general stress proteins prior to growth-inhibiting stress conferred considerable protection against heat and salt. Exhaustion of glucose or phosphate induced the ςB response, but surprisingly, ςB did not seem to be required for starvation survival. Starved wild-type cells exhibited about 10-fold greater resistance to salt stress than exponentially growing cells. The data argue that the expression of ςB-dependent genes provides nonsporulated B. subtilis cells with a nonspecific multiple stress resistance that may be relevant for stress survival in the natural ecosystem.

Arsenic Toxicity in Crop Plants: Approaches for Stress Resistance

2012 ◽  
pp. 347-360
Author(s):  
Alok Krishna Sinha ◽  
Dhammaprakash Pandahri Wankhede ◽  
Meetu Gupta
Keyword(s):  
Stress Resistance ◽  
Crop Plants ◽  
Arsenic Toxicity
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