Effects of Stress Temperatures of Germination on Polyamine Titers of Soybean Seeds PDF Download
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Author: Renan Pineda Mejia
Publisher:
ISBN:
Category :
Languages : en
Pages : 182
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The concentrations of Cad and Put in the embryonic axis, were significantly higher in seeds germinated under low temperature than in seeds at 25 0C (approximately 10 and 3 fold respectively). However, this difference was not observed until the last three stages of germination. The stage of germination also influenced the levels of these polyamines. The concentrations of Cad and Put detected at the CS stage were 50 and 18 fold respectively, relative to the initial concentrations found at the DS stage. Spd levels in seeds under stress temperatures also increased, but to a lesser extent compared to Cad and Put. Differences in Spd concentrations between temperatures were observed only at the CS stage. Agm concentrations were higher at 25 than at 10 0C at SRP and CS. Spm concentrations of seeds germinated at 25 0C remained higher during the first four stages of development but at the end of germination, seeds at 10 0C had higher quantities of Spm. In the cotyledons, Polyamines tended to decline with stages of germination, regardless of the temperature. However, Agm levels increased in the cotyledons of soybean seeds. Maximum dry weight and seedling growth was found at RHV, SRP, and CS. Maximum levels of Cad and Put were also found during these stages. Spd increased with both temperatures from DS to Ra-10, thereafter, Spd levels in seeds at 10 0C continued increasing while seeds at 25 0C declined. High and low stress germination temperatures caused significant changes in polyamine concentrations, reduced germination and seedling growth of soybean seeds.
Author: Renan Pineda Mejia
Publisher:
ISBN:
Category :
Languages : en
Pages : 182
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Book Description
The concentrations of Cad and Put in the embryonic axis, were significantly higher in seeds germinated under low temperature than in seeds at 25 0C (approximately 10 and 3 fold respectively). However, this difference was not observed until the last three stages of germination. The stage of germination also influenced the levels of these polyamines. The concentrations of Cad and Put detected at the CS stage were 50 and 18 fold respectively, relative to the initial concentrations found at the DS stage. Spd levels in seeds under stress temperatures also increased, but to a lesser extent compared to Cad and Put. Differences in Spd concentrations between temperatures were observed only at the CS stage. Agm concentrations were higher at 25 than at 10 0C at SRP and CS. Spm concentrations of seeds germinated at 25 0C remained higher during the first four stages of development but at the end of germination, seeds at 10 0C had higher quantities of Spm. In the cotyledons, Polyamines tended to decline with stages of germination, regardless of the temperature. However, Agm levels increased in the cotyledons of soybean seeds. Maximum dry weight and seedling growth was found at RHV, SRP, and CS. Maximum levels of Cad and Put were also found during these stages. Spd increased with both temperatures from DS to Ra-10, thereafter, Spd levels in seeds at 10 0C continued increasing while seeds at 25 0C declined. High and low stress germination temperatures caused significant changes in polyamine concentrations, reduced germination and seedling growth of soybean seeds.
Author: Mohammad Miransari
Publisher: Academic Press
ISBN: 0128017309
Category : Technology & Engineering
Languages : en
Pages : 348
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Book Description
Abiotic and Biotic Stresses in Soybean Production: Soybean Production Volume One presents the important results of research in both field and greenhouse conditions that guide readers to effectively manage the chemical, physical, and biological factors that can put soybean production at risk. Including the latest in genetics, signaling, and biotechnology, the book identifies these types of stresses, their causes, and means of avoiding, then addresses existing stresses to provide a comprehensive overview of key production yield factors. By presenting important insights into the historical and emerging uses for soybean, the book educates readers on the factors for consideration as new uses are developed. It is an ideal complement to volume two, Environmental Stress Conditions in Soybean Production, that work together to provide valuable insights into crop protection. - Presents insights for the successful production of soybean based on chemical, physical and biologic challenges - Includes the latest specifics on soybean properties, growth, and production, including responses to different stresses and their alleviation methods - Offers recent advancements related to the process of N fixation and rhizobium, including signaling pathways and their practical use - Explores the production of rhizobium inoculums at large-scale levels
Author: Eileen Feilmeier Wuebker
Publisher:
ISBN:
Category :
Languages : en
Pages : 170
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Impact damaged seeds sustained a greater loss in viability due to impact damage at 25° C compared with 15° C. Overall, seeds at 15° C were more susceptible to flooding stress than seeds at 25° C, but temperature differences were not significant when flooding seeds that had imbibed water for 3 days or when flooding persisted for 48 h. These results suggest flooding soybean seeds 3 days after the start of imbibition for as little as 48 h in the laboratory can cause significant reductions in the ability of seeds to germinate and produce healthy seedlings. Additional studies correlating these results with flooding in field situations are needed.
Author:
Publisher:
ISBN:
Category : Dissertations, Academic
Languages : en
Pages : 992
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Author: Rubén Alcázar
Publisher: Frontiers E-books
ISBN: 2889193039
Category : Botany
Languages : en
Pages : 141
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Book Description
Polyamines are small aliphatic polycations which have been involved in key stress and developmental processes in plants. In the recent years, compelling genetic and molecular evidences point to polyamines as essential metabolites required for resistance to drought, freezing, salinity, oxidative stress among other type of abiotic and biotic stresses. In addition to their role as stress-protective compounds, polyamines participate in key developmental processes mediated by specific signaling pathways or in cross-regulation with other plant hormones. Our Research Topic aims to integrate the multiple stress and developmental regulatory functions of polyamines in plants under a genetic, molecular and evolutionary perspective with special focus on signaling networks, mechanisms of action and metabolism regulation.
Author:
Publisher:
ISBN:
Category : Dissertation abstracts
Languages : en
Pages : 848
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Author: Narendra Tuteja
Publisher: Springer Science & Business Media
ISBN: 1461450012
Category : Science
Languages : en
Pages : 507
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Book Description
The mechanisms underlying endurance and adaptation to environmental stress factors in plants have long been the focus of intense research. Plants overcome environmental stresses by development of tolerance, resistance or avoidance mechanisms, adjusting to a gradual change in its environment which allows them to maintain performance across a range of adverse environmental conditions. Plant Acclimation to Environmental Stress presents the latest ideas and trends on induced acclimation of plants to environmental stresses under changing environment. Written by experts around the globe, this volume adds new dimensions in the field of plant acclimation to abiotic stress factors. Comprehensive and lavishly illustrated, Plant Acclimation to Environmental Stress is a state-of-the-art guide suited for scholars and researchers working in the field of crop improvement, genetic engineering and abiotic stress tolerance.
Author:
Publisher:
ISBN:
Category : Agriculture
Languages : en
Pages : 1390
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Author: Vadim Demidchik
Publisher: Springer Science & Business Media
ISBN: 3642104940
Category : Science
Languages : en
Pages : 242
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Plants live in a constantly changing environment from which they cannot physically escape. Plants therefore need signalling and response mechanisms to adapt to new local conditions. The ef?cacy of such mechanisms underlies the plant performance during stress and therefore also impacts greatly on agricultural productivity. M- ulation of ion channel activity not only provides a means for rapid signal generation 2+ but also allows adjustment of cellular physiology. For example, Ca permeable ion 2+ channels can transduce environmental stimuli into Ca -encoded messages which can modify the gene expression. Furthermore, ion channel activity is essential to control cellular ion homeostasis that impacts on plant responses to drought, salinity, pathogens, nutrient de?ciency, heavy metals, xenobiotics and other stresses. This volume focuses on the crucial roles of different types of ion channel in plant stress responses. Functions of ion channels are discussed in the context of mechanisms to relay external and endogenous signals during stress and as mechanisms to regulate cellular ion homeostasis and enzymatic activities in the context of biotic and abiotic stress. The chapters presented cover cation and anion channels located in various cellular compartments and tissues.
Author:
Publisher:
ISBN:
Category : Botany
Languages : en
Pages : 1288
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