Water Stress Effects On Physiological Processes And Yield Of Soybeans
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Water Stress Effects On Physiological Processes And Yield Of Soybeans
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Author : Mahmoud Fadl El Mula Ahmed
language : en
Publisher:
Release Date : 1983
Water Stress Effects On Physiological Processes And Yield Of Soybeans written by Mahmoud Fadl El Mula Ahmed and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1983 with Plants categories.
Soybeans [Glycine max (L.) Merr.] cv. Bragg were grown in field lysimeters for the study of water stress effects on certain physiological characteristics during different growth periods. A second objective was to study changes in plant water relations of well-irrigated soybeans during the growing season. Mid-day measurements were taken for soil water potential, leaf water potential components, stomatal diffusive resistence, transpiration, and leaf temperature. In well-irrigated plants, leaf osmotic potential began to decline with the onset of flowering, causing a considerable decrease in the leaf water potential. Mid-day turgor potential maintained hight values (5 to 8 bars) throughout the growing season. Diffusive resistence, transpiration rates, and leaf-to-air temperature differential (leaf temperature minus air temperature) were also constant util after R[indice]5, when diffusive resistance began to increase, transpiration rates decreased and temperature differential increased. This was related to plant aging as the crop approached the late reproductive growth stages. As estomatal diffusive resistance increased, transpiration cooling was less resulting in increased temperature differentials. During the drying cycles, leaf water potential componentes of the stressed plants were, in most cases, lower than teh control plants. Transpiration rates and stomatal conductance were also lower in the stressed plants while leaf-to-air temperature differential was greater. A high correlation was observed between osmotic potential and leaf water potential during drying cycles and was most likely associated with dehydration effect which resulted in increased concentrations of the osmotic components. However, osmotic potential at full turgor (leaf water potential equal to zero), showed progressive decreases during the season, giving values of -9.4, -10.9, -11.6 and -15.1 bars at V[indice]5, R[indice]1, R[indice]5 and R[indice]6 stages, respectively. This reflects changes in osmotic potential of soybeans as they grow from vegetative to reproductive phases. The slope of [phi][indice][pi] versus [phi][indice]L also declined from 0.437 at V[indice]5 to 0.233 at R[indice]6, suggesting reduced plasticity during late reproductive stages. Moisture strees during R[indice]6 resulted in significant diferences in harvest index, 100-seed weigth, percent empty pods, and shelling percentage as compared to the well-watered control. No significant differences in seed yield were observed; however, the data suggests yield reductions of 12%, 13% and 14% due to water withholding during V[indice]5, V[indice]5 plus R[indice]5, and R[indice]6 growth periods, respectively.
Soil Moisture Stress Effects On Soybean Vegetative Physiological And Reproductive Growth And Post Harvest Seed Physiology Quality And Chemical Composition
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Author : Chathurika Wijewardana
language : en
Publisher:
Release Date : 2018
Soil Moisture Stress Effects On Soybean Vegetative Physiological And Reproductive Growth And Post Harvest Seed Physiology Quality And Chemical Composition written by Chathurika Wijewardana and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2018 with categories.
With the increasing scarcity of water resources, soil moisture stress is the single most threat to global soybean production causing extensive yield losses. The objectives of this study were to investigate soil moisture stress effects on all aspects of soybean growth and development processes and to develop functional algorithms that could be used for field management decisions and in soybean crop modeling. To fulfill these objectives, six experiments were conducted; one in vitro osmotic stress study on seed germination, four studies by imposing five soil moisture treatments, 100, 80, 60, 40, and 20% of daily evapotranspiration of the control at different growth stages using sunlit plant growth chambers, and one transgenerational study on seed germination at different osmotic levels and offspring growth at three irrigation treatments (100, 66, and 33% based on field capacity) for plants grown at different soil moisture levels. Two cultivars from maturity group V, Asgrow AG5332 and Progeny P5333RY, with different growth habits were used in all these studies. Midday leaf water potential, plant height, mainstem nodes, gas-exchange traits, canopy reflectance, and several yield components including pod weight, seed yield, and seed quality were measured. Soil moisture stress decreased biomass, net photosynthesis, yield, individual seed weight, maximum seed germination, protein, fatty acids, sucrose, N, and P and increased oil, stachyose, Fe, Mg, Zn, Cu, and B contents. Overall, Asgrow AG5332 was more tolerant to drought stress than Progeny P5333RY. Soil moisture stress induced changes in seed quality that were correlated with seed germination and seedling vigor in the F1 generation. These data can be used to build a model-based decision support system capable of predicting yield under field conditions.
A Comprehensive Survey Of International Soybean Research
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Author : James Board
language : en
Publisher: IntechOpen
Release Date : 2013-01-02
A Comprehensive Survey Of International Soybean Research written by James Board and has been published by IntechOpen this book supported file pdf, txt, epub, kindle and other format this book has been release on 2013-01-02 with Technology & Engineering categories.
Soybean is the most important oilseed and livestock feed crop in the world. These dual uses are attributed to the crop's high protein content (nearly 40% of seed weight) and oil content (approximately 20%); characteristics that are not rivaled by any other agronomic crop. Across the 10-year period from 2001 to 2010, world soybean production increased from 168 to 258 million metric tons (54% increase). Against the backdrop of soybean's striking ascendancy is increased research interest in the crop throughout the world. Information in this book presents a comprehensive view of research efforts in genetics, plant physiology, agronomy, agricultural economics, and nitrogen relationships that will benefit soybean stakeholders and scientists throughout the world. We hope you enjoy the book.
Water Stress Morphological And Anatomical Changes In Soybean Glycine Max L Plants
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Author : Phetole Mangena
language : en
Publisher:
Release Date : 2018
Water Stress Morphological And Anatomical Changes In Soybean Glycine Max L Plants written by Phetole Mangena and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2018 with Medicine categories.
Water stress is one of the most important physiological stress factors that adversely affect soybeans in many critical aspects of their growth and metabolism. Soybean's growth, development and productivity are severely diminished, when soil or cell water potential becomes inadequate to sustain metabolic functioning. However, little has been done to gather comprehensive information regarding the specific changes that occur in water-stressed plants at the anatomical and morphological level. In this study, deviations in root growth, shoot growth, stomatal conductance, yield components and anatomical features are reported. Treatments with two levels of water stress imposed by reducing irrigation (once in 7 days or once in 15 days) revealed that, all cultivars (Dundee, LS 677, LS 678, TGx 1740-2F, TGx 1835-10E and Peking) were highly susceptible to prolonged water stress, exhibiting severe dehydration and death. A 15.0 and 30.0% survival frequency was obtained in plants irrigated once in 7 days; LS 677 and Peking, respectively. Unlike many other stresses, water deficit did not only affect the density of stomata, but, photosynthesis was affected by the lower levels of tissue CO2. These results suggest that, balanced biochemical, physiological, anatomical and morphological regulations are necessary for increased growth and yields in soybean.
Physiological And Proteomic Analysis Of Soybean In Response To Drought And Heat Stress
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Author : Amandeep Kaur
language : en
Publisher:
Release Date : 2023
Physiological And Proteomic Analysis Of Soybean In Response To Drought And Heat Stress written by Amandeep Kaur and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2023 with categories.
Drought and temperature stress are the two most important factors limiting crop productivity. A physiological and proteomic analysis of soybean was performed to investigate the negative impact of these variables. The previous studies reported the beneficial effect of silicon under stress conditions. Silicon supplementation may promote plant growth under drought stress, although the mechanism to alleviate drought stress is uncertain. The proteomic analysis of chloroplast proteins was carried out to study the response of silicon supplementation under drought stress. Similarly, temperature stress, mainly heat stress, has an adverse effect on soybean plants. The comparative analysis of two soybean cultivars, DS25-1 and DS31-243 was examined under ambient and elevated CO2 levels. The proteomic study employed two-dimensional gel analysis and mass spectrometry techniques to identify differentially expressed proteins under drought and temperature stress. The identified proteins are involved in metabolic processes, photosynthesis, signaling, redox homeostasis, and other cellular pathways. Most of these proteins were involved in metabolism, response to heat and photosynthesis showing significant cross-tolerance mechanisms. The physiological parameters like stomatal conductance, transpiration, photosynthesis, and chlorophyll pigments were also studied. Silicon application improved plant growth under drought stress. However, at the elevated CO2 level, plants showed better growth under heat stress. Together, these findings suggested the role of silicon and elevated CO2 concentration in drought and temperature stress in soybean. The differentially expressed proteins helped mitigate the negative impact of these stress, mainly the photosynthetic, antioxidant and heat shock proteins, and enhance crop growth and productivity under drought and heat stress.
Water Stress In Plants
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Author : Ismail M. M. Rahman
language : en
Publisher: BoD – Books on Demand
Release Date : 2016-08-24
Water Stress In Plants written by Ismail M. M. Rahman and has been published by BoD – Books on Demand this book supported file pdf, txt, epub, kindle and other format this book has been release on 2016-08-24 with Science categories.
Water stress in plants is caused by the water deficit, as induced possibly by drought or high soil salinity. The prime consequence of water stress in plants is the disruption in the agricultural production, resulting in food shortage. The plants, however, try to adapt to the stress conditions using biochemical and physiological interventions. The edited compilation is an attempt to provide new insights into the mechanism and adaptation aspects of water stress in plants through a thoughtful mixture of viewpoints. We hope that the content of the book will be useful for the researchers working with the plant diversity-related environmental aspects and also provide suggestions for the strategists.
Physiological Breeding
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Author : Alistair Pask
language : en
Publisher: CIMMYT
Release Date : 2012
Physiological Breeding written by Alistair Pask and has been published by CIMMYT this book supported file pdf, txt, epub, kindle and other format this book has been release on 2012 with categories.
Environmental Stresses In Soybean Production
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Author : Mohammad Miransari
language : en
Publisher: Academic Press
Release Date : 2016-06-14
Environmental Stresses In Soybean Production written by Mohammad Miransari and has been published by Academic Press this book supported file pdf, txt, epub, kindle and other format this book has been release on 2016-06-14 with Technology & Engineering categories.
Environmental Stress Conditions in Soybean Production: Soybean Production, Volume Two, examines the impact of conditions on final crop yield and identifies core issues and methods to address concerns. As climate and soil quality changes and issues continue to manifest around the world, methods of ensuring sustainable crop production is imperative. The care and treatment of the soil nutrients, how water availability and temperature interact with both soil and plant, and what new means of crop protection are being developed make this an important resource for those focusing on this versatile crop. The book is a complement to volume one, Abiotic and Biotic Stresses in Soybean Production, providing further insights into crop protection. Presents insights for addressing specific environmental stress conditions in soybean production, including soil, atmospheric, and other contributing factors Facilitates translational methods based on stress factors from around the world Examines the future of soybean production challenges, including those posed by climate change Complements volume one, Abiotic and Biotic Stresses in Soybean Production, providing further insights into crop protection
Plant Abiotic Stress And Responses To Climate Change
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Author : Violeta Andjelkovic
language : en
Publisher: BoD – Books on Demand
Release Date : 2018-05-23
Plant Abiotic Stress And Responses To Climate Change written by Violeta Andjelkovic and has been published by BoD – Books on Demand this book supported file pdf, txt, epub, kindle and other format this book has been release on 2018-05-23 with Medical categories.
Climate change is a serious problem influencing agricultural production worldwide and challenging researchers to investigate plant responses and to breed crops for the changed growing conditions. Abiotic stresses are the most important for crop production, affecting about 96.5% of arable land worldwide. These stress factors include high and low temperature, water deficit (drought) and flooding, salinity, heavy metals, UV radiation, light, chemical pollutants, and so on. Since some of the stresses occurred simultaneously, such as heat and water deficit, causing the interactions of physiological processes, novel multidisciplinary solutions are needed. This book provides an overview of the present state in the research of abiotic stresses and molecular, biochemical, and whole plant responses, helping to prevent the negative impact of global climate change.
Soybean
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Author : Minobu Kasai
language : en
Publisher: BoD – Books on Demand
Release Date : 2019-02-20
Soybean written by Minobu Kasai and has been published by BoD – Books on Demand this book supported file pdf, txt, epub, kindle and other format this book has been release on 2019-02-20 with Technology & Engineering categories.
Plants are important for a permanent ecosystem, because in the ecological pyramid plants support all the other living organisms at the base. Very important organization is thought to be the integral process of resource, transport, partitioning, metabolism, and production, which involves yield, biomass, and productivity in plants. Accordingly, it is important to obtain more information about the knowledge concerning yield, biomass, and productivity in plants. Soybean is one of the main crops largely contributing to our life, which is thought to be connected to our ecosystem through the above-mentioned integral process. This book focuses on the soybean, and reviews and research concerning the yield, biomass, and productivity of soybean are presented herein. This text updates the book published in 2017. Although there are many difficulties, the main aim of this book is to present a basis for the above-mentioned integral processes of resource, transport, partitioning, metabolism, and production, which involves yield, biomass, and productivity in plants (soybean), and to understand what supports this basis and the integral process. It is hoped that this and the preceding book will be essential reads.