The Experts below are selected from a list of 297 Experts worldwide ranked by ideXlab platform
Rodolfo A Sánchez - One of the best experts on this subject based on the ideXlab platform.
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Handbook of Seed Physiology
Biotechnology, 2004Co-Authors: Roberto L. Benech-arnold, Rodolfo A SánchezAbstract:479 pagesThe latest findings in seed physiology—discussed as they relate to agricultural problems! Presenting the latest findings in the area of seed physiology as well as the practical applications of that knowledge in the field, the Handbook of Seed Physiology: Applications to Agriculture provides a comprehensive view of seed biology and its role in crop performance. Key topics include seed Germination, crop emergence, crop establishment, dormancy, preharvest sprouting, plant hormones, abscisic and giberellic acids, weeds, grain quality, oil crops, and malting quality. Abundant case studies provide information of value to researchers, students, and professionals in the fields of seed science, field crop research, crop science, agronomy, and seed technology. The Handbook of Seed Physiology discusses vital topics which serve as the basis for the development of techniques and processes to improve seed performance and crop yield. In this text, you will explore:- the effect of the soil physical environment on seed Germination- the roles of physiology, genetics, and environment in the inception, maintenance, and termination of dormancy- the relationship between the termination of dormancy and the synthesis and signaling of gibberellins and abscisic acid- mechanisms of orthodox seed deterioration and approaches for repair of seed damage- characteristics, behavior, and mechanisms of desiccation tolerance in recalcitrant seeds
Simon J Foster - One of the best experts on this subject based on the ideXlab platform.
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peptidoglycan structural dynamics during Germination of bacillus subtilis 168 endospores
Journal of Bacteriology, 1998Co-Authors: Abdelmadjid Atrih, Peter Zollner, Gunter Allmaier, Michael P Williamson, Simon J FosterAbstract:Peptidoglycan structural dynamics during endospore Germination of Bacillus subtilis 168 have been examined by muropeptide analysis. The first Germination-associated peptidoglycan structural changes are detected within 3 min after the addition of the specific germinant L-alanine. We detected in the spore-associated material new muropeptides which, although they have slightly longer retention times by reversed-phase (RP)-high-pressure liquid chromatography (HPLC) than related ones in dormant spores, show the same amino acid composition and molecular mass. Two-dimensional nuclear magnetic resonance (NMR) analysis shows that the chemical changes to the muropeptides on Germination are minor and are probably limited to stereochemical inversion. These new muropeptides account for almost 26% of the total muropeptides in spore-associated material afte r2ho fGermination. The exudate of germinated spores of B. subtilis 168 contains novel muropeptides in addition to those present in spore-associated material. Exudate-specific muropeptides have longer retention times, have no reducing termini, and exhibit a molecular mass 20 Da lower than those of related reduced muropeptides. These new products are anhydro-muropeptides which are generated by a lytic transglycosylase, the first to be identified in a gram-positive bacterium. There is also evidence for the activity of a glucosaminidase during the Germination process. Quantification of muropeptides in spore-associated material indicates that there is a heterogeneous distribution of muropeptides in spore peptidoglycan. The spore-specific residue, muramic d-lactam, is proposed to be a major substrate specificity determinant of Germination-specific lytic enzymes, allowing cortex hydrolysis without any effect on the primordial cell wall.
Roberto L. Benech-arnold - One of the best experts on this subject based on the ideXlab platform.
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Handbook of Seed Physiology
Biotechnology, 2004Co-Authors: Roberto L. Benech-arnold, Rodolfo A SánchezAbstract:479 pagesThe latest findings in seed physiology—discussed as they relate to agricultural problems! Presenting the latest findings in the area of seed physiology as well as the practical applications of that knowledge in the field, the Handbook of Seed Physiology: Applications to Agriculture provides a comprehensive view of seed biology and its role in crop performance. Key topics include seed Germination, crop emergence, crop establishment, dormancy, preharvest sprouting, plant hormones, abscisic and giberellic acids, weeds, grain quality, oil crops, and malting quality. Abundant case studies provide information of value to researchers, students, and professionals in the fields of seed science, field crop research, crop science, agronomy, and seed technology. The Handbook of Seed Physiology discusses vital topics which serve as the basis for the development of techniques and processes to improve seed performance and crop yield. In this text, you will explore:- the effect of the soil physical environment on seed Germination- the roles of physiology, genetics, and environment in the inception, maintenance, and termination of dormancy- the relationship between the termination of dormancy and the synthesis and signaling of gibberellins and abscisic acid- mechanisms of orthodox seed deterioration and approaches for repair of seed damage- characteristics, behavior, and mechanisms of desiccation tolerance in recalcitrant seeds
E Younesi - One of the best experts on this subject based on the ideXlab platform.
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effect of hormone priming on Germination characteristics and enzyme activity of mountain rye secale montanum seeds under drought stress conditions
Journal of Stress Physiology & Biochemistry, 2013Co-Authors: O Ansari, M S Azadi, F Sharifzadeh, E YounesiAbstract:) to increase seed Germination and tolerance on stress exposure. Rye seeds were treated with various priming agents for different time and temperatures. The effect of priming was assessed on Germination characteristics on subsequent exposure to drought (PEG -14 bar) stress for 7 days. Seed priming treatments significantly (p≤ 0.01) affected, Germination percentage (GP), normality seedling percentage (NSP), Germination Index (GI), Germination uniformity (GU), means time to Germination (MTG), coefficient of velocity of Germination (CVG), seedling vigour index (SVI) and coefficient of allometry(AC). Seed priming with gibberelic acid (GA) and salicylic acid (SA) (p≤ 0.01) increased Germination characteristics as the compared to the unprimed. Seed priming with concentrations 25, 50 ppm of GA for 15 h at 10
Hiroyuki Nonogaki - One of the best experts on this subject based on the ideXlab platform.
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seed dormancy and Germination emerging mechanisms and new hypotheses
Frontiers in Plant Science, 2014Co-Authors: Hiroyuki NonogakiAbstract:Seed dormancy has played a significant role in adaptation and evolution of seed plants. While its biological significance is clear, molecular mechanisms underlying seed dormancy induction, maintenance and alleviation still remain elusive. Intensive efforts have been made to investigate gibberellin and abscisic acid metabolism in seeds, which greatly contributed to the current understanding of seed dormancy mechanisms. Other mechanisms, which might be independent of hormones, or specific to the seed dormancy pathway, are also emerging from genetic analysis of “seed dormancy mutants”. These studies suggest that chromatin remodeling through histone ubiquitination, methylation and acetylation, which could lead to transcription elongation or gene silencing, may play a significant role in seed dormancy regulation. Small interfering RNA and/or long non-coding RNA might be a trigger of epigenetic changes at the seed dormancy or Germination loci, such as DELAY OF Germination1. While new mechanisms are emerging from genetic studies of seed dormancy, novel hypotheses are also generated from seed Germination study with high throughput gene expression analysis. Recent studies on tissue-specific gene expression in tomato and Arabidopsis seeds, which suggested possible “mechanosensing” in the regulatory mechanisms, advanced our understanding of embryo-endosperm interaction and have potential to re-draw the traditional hypotheses or integrate them into a comprehensive scheme. The progress in basic seed science will enable knowledge translation, another frontier of research to be expanded for food and fuel production.
