Download or read book Physiological and Yield Responses of Soybean Cultivars to Heat and Drought Stresses written by Sadikshya Poudel and published by . This book was released on 2023 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Soybean (Glycine max L.) is an important legume crop often exposed to heat and drought stresses during reproductive and early-seed setting stages, resulting in lower yields and seed quality. Ten soybean cultivars were phenotyped for individual (drought or heat) and combined stress tolerance. Under drought, reduced stomatal conductance and increased canopy temperature significantly reduced seed number (46%) and weight (35%). Heat stress alone reduced seed number (19%) and weight (23%) compared to control. Moreover, a degree increase in daytime temperature above 32 ℗ʻC during the reproductive stage reduced seed weight by 4% and 7% under well-watered and drought conditions, respectively. Seed protein was increased under drought, while it declined under heat and combined stress compared to control. In contrast, oil content showed the opposite trend. Weak correlations between phenotypic traits under individual and combined stress suggest that selecting cultivars for individual stress tolerance may not work under combined stress conditions.
Download or read book A Comprehensive Survey of International Soybean Research Genetics Physiology Agronomy and Nitrogen Relationships written by James E. Board and published by . This book was released on 2013 with total page 626 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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.
Download or read book Physiological and Proteomic Analysis of Soybean in Response to Drought and Heat Stress written by Amandeep Kaur and published by . This book was released on 2023 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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.
Download or read book Combined Stresses in Plants written by Ramamurthy Mahalingam and published by Springer. This book was released on 2014-12-05 with total page 271 pages. Available in PDF, EPUB and Kindle. Book excerpt: The unique responses of plants to combined stresses have been observed at physiological, biochemical, and molecular levels. This book provides an analysis of all three levels of change in various plants in response to different combinations of stresses. The text provides a general review of the combined stress paradigm, focuses on the impact of higher CO2 levels in combination with other stresses, examines drought stress in conjunction with other abiotic factors in different crop plants as well as the combination of biotic and abiotic factors, and discusses the impact of combined stresses in forest ecosystems. Written by experts in the field, Combined Stresses in Plants: Physiological, Molecular, and Biochemical Aspects is a valuable resource for scientists, graduate students, and post-doctoral fellows alike working in plant stresses.
Download or read book Physiological molecular and genetic perspectives of environmental stress response in plants written by Pasala Ratnakumar and published by Frontiers Media SA. This book was released on 2023-07-04 with total page 218 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Response of Crops to Limited Water written by Lajpat Ahuja and published by ASA-CSSA-SSSA. This book was released on 2008 with total page 456 pages. Available in PDF, EPUB and Kindle. Book excerpt: Water stress and heat stress are considered to be two primary factors that limit crop production in many parts of the world. Global warming appears to be increasing the water requirements of plants. Understanding the impact of water deficit on plant physiological processes and efficient water management are of great concern in maintaining food production to meet ever increasing world food demand. The book addresses various climatic soil and plant factors that contribute to the water use efficiency in plants subjected to water stress. It covers all issues related to soil, plant and climatic factors that contribute to the crop responses to water stress. The books advances the knowledge in improving and sustaining crop yields in ever increasing unpredictable climatic fluctuations This book uses crop simulation models for response of crops to limited water under various management and climatic conditions.
Download or read book Plant Abiotic Stress and Responses to Climate Change written by Violeta Andjelkovic and published by BoD – Books on Demand. This book was released on 2018-05-23 with total page 188 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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.
Download or read book Genome wide Association Study of Plant Physiological Parameters Yield and Nitrogen Fixation related Traits in Soybean Under Drought Stress written by Dilrukshi Kaushalya Dias Kombala Liyanage and published by . This book was released on 2022 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Soybean is one of the world's leading legume crops. It fixes atmospheric nitrogen with the symbiotic relationship of rhizobia bacteria that inhabit root nodules. The global population is expected to exceed 9.7 billion by 2050, resulting in increased food demand, particularly for protein. In Canada, soybean is the third largest field crop in terms of farm cash receipts, and its production has recently grown significantly in the Canadian Prairies. The changing global climate is predicted to lead large areas of the world to experience extensive drought conditions over the next few decades. Drought will be a critical issue for western Canada as it has been experiencing frequent and severe droughts over the last few decades. Drought has negative impacts on soybean plant development, yield, and symbiotic nitrogen fixation. The main objective of this project is to identify the allelic variations associated with diverse short-season soybean varieties for plant physiological parameters, yield traits, and symbiotic nitrogen fixation under drought stress. A greenhouse pot experiment with 103 early-maturity Canadian soybean varieties was conducted to determine the above-mentioned traits. Seedlings were inoculated with Bradyrhizobium japonicum USDA 110, and the initial soil moisture content of the growing media was maintained at 80% field capacity (FC). Drought stress was applied after three weeks of plant growth, with half of the plants kept at 30% FC and the remaining at 80% FC until maturity. Plant physiological traits such as photosynthesis, transpiration, stomatal conductance, leaf chlorophyll, water-use efficiency, and intrinsic water use efficiency were collected during the flowering stage. At seed maturity, data on yield and nitrogen fixation-related traits, including number of pods, number of seeds, seed yield, 100-seed weight, seed nitrogen content, % nitrogen derived from the atmosphere (%Ndfa), total seed nitrogen fixed, and carbon isotope discrimination (CID), were collected. Drought stress reduced stomatal conductance and transpiration, resulting in greater water-use efficiency compared to well-watered plants at the flowering stage. In comparison to the well-watered treatment, drought-stressed soybean plants had lower seed yield, yield components (number of pods, number of seeds, 100-seed weight), seed nitrogen content, %Ndfa, and total fixed nitrogen. Specifically, drought reduced yield by 34.7%. %Ndfa by 13.4%, total seed nitrogen by 34.9%, and amount of seed nitrogen fixed by 42.1% compared to the well-watered treatment. Significant genotypic variability among soybean varieties was found for plant physiological parameters, yield parameters, nitrogen fixation traits, and water use efficiency. A Genome-Wide Association Study (GWAS) was conducted using 2.16M SNPs (2,164,465 SNPs) for above mentioned parameters for 30% FC, 80% FC and their relative performance (30% FC / 80% FC). In total, 13 quantitative trait locus (QTL) regions, including multiple candidate genes, were detected as significantly associated with different plant physiological traits, including photosynthesis, stomatal conductance, and water-use efficiency for 30% FC and relative performance. In terms of yield and nitrogen fixation-related characteristics, six QTL regions and candidate genes were identified as significantly correlated with %Ndfa and CID under drought stress and relative performance. These QTL regions may be useful in future breeding efforts to create drought-resistant soybean cultivars.
Download or read book Drought Stress Tolerance in Plants Vol 2 written by Mohammad Anwar Hossain and published by Springer. This book was released on 2016-08-24 with total page 616 pages. Available in PDF, EPUB and Kindle. Book excerpt: Drought is one of the most severe constraints to crop productivity worldwide, and thus it has become a major concern for global food security. Due to an increasing world population, droughts could lead to serious food shortages by 2050. The situation may worsen due to predicated climatic changes that may increase the frequency, duration and severity of droughts. Hence, there is an urgent need to improve our understanding of the complex mechanisms associated with drought tolerance and to develop modern crop varieties that are more resilient to drought. Identification of the genes responsible for drought tolerance in plants will contribute to our understanding of the molecular mechanisms that could enable crop plants to respond to drought. The discovery of novel drought related genes, the analysis of their expression patterns in response to drought, and determination of the functions these genes play in drought adaptation will provide a base to develop effective strategies to enhance the drought tolerance of crop plants. Plant breeding efforts to increase crop yields in dry environments have been slow to date mainly due to our poor understanding of the molecular and genetic mechanisms involved in how plants respond to drought. In addition, when it comes to combining favourable alleles, there are practical obstacles to developing superior high yielding genotypes fit for drought prone environments. Drought Tolerance in Plants, Vol 2: Molecular and Genetic Perspectives combines novel topical findings, regarding the major molecular and genetic events associated with drought tolerance, with contemporary crop improvement approaches. This volume is unique as it makes available for its readers not only extensive reports of existing facts and data, but also practical knowledge and overviews of state-of-the-art technologies, across the biological fields, from plant breeding using classical and molecular genetic information, to the modern omic technologies, that are now being used in drought tolerance research to breed drought-related traits into modern crop varieties. This book is useful for teachers and researchers in the fields of plant breeding, molecular biology and biotechnology.
Download or read book Physiological Breeding written by Alistair Pask and published by CIMMYT. This book was released on 2012 with total page 140 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Response of Field Crops to Abiotic Stress written by Shuvasish Choudhury and published by CRC Press. This book was released on 2022-12-15 with total page 770 pages. Available in PDF, EPUB and Kindle. Book excerpt: Response of Field Crops to Abiotic Stress: Current Status and Future Prospects is a collection of useful scientific resources for students, researchers, and academicians on diverse aspects of abiotic stress responses in field crops. The book provides its readers with a vivid understanding of abiotic stress responses in field crops by covering diverse aspects. It offers exhaustive explanations of the impact and responses of field crops to abiotic stresses. This book offers comprehensive coverage of: Climate change impact on field crops Arsenic and aluminium stress responses in field crops Drought, high temperature, and flooding stress responses in field crops Salinity and osmotic stress responses in field crops Heavy metal stress responses in field crops UV stress responses Elemental biofortification Reactive oxygen species (ROS) metabolism Nutraceutical and human health Computational modelling approaches for abiotic stresses in plants
Download or read book Advances in Molecular Breeding Toward Drought and Salt Tolerant Crops written by Matthew A. Jenks and published by Springer Science & Business Media. This book was released on 2009-05-07 with total page 819 pages. Available in PDF, EPUB and Kindle. Book excerpt: With near-comprehensive coverage of new advances in crop breeding for drought and salinity stress tolerance, this timely work seeks to integrate the most recent findings about key biological determinants of plant stress tolerance with modern crop improvement strategies. This volume is unique because is provides exceptionally wide coverage of current knowledge and expertise being applied in drought and salt tolerance research.
Download or read book Genetic Variation for Physiological Traits Affecting Drought Tolerance Among Ontario adapted Commercial Soybean Glycine Max L Merr Varieties Grown in 1 m Rooting Columns written by Michael Gebretsadik Gebre and published by . This book was released on 2020 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Drought stress significantly limits soybean production in Ontario. Identification of physiological traits to improve drought tolerance in soybean would benefit from controlled-environment phenotyping methods. It was hypothesized that elite Ontario-adapted soybean varieties would differ for drought tolerance. A greenhouse culture system was developed employing 1-m rooting columns filled with amended field soil, that presents field-like volumetric soil water content and rooting profiles by depth. Different levels of drought stress were simulated in this system by restoring soil water to 100% (control), 75% (mild stress) or 50% (drought stress) of the maximum soil water holding capacity by daily weighing and watering from first flower (R1) until maturity. The effect of applying fertilizer throughout the 1-m soil profile instead of confining it to the upper 30 cm was tested. Distributing fertilizer over the entire 1-m rooting depth resulted in deeper rooting and more soil water extraction at depth at the R1 stage; however, these effects did not persist until maturity and so did not affect drought tolerance. Fifteen Ontario-adapted commercial soybean varieties were compared for their drought tolerance, defined as the ratio of their seed yield under drought conditions compared to control conditions (seed yield ratio; SYR). Similar to the effects of drought in the field, pod number was by far the yield component most affected, with effects on seeds per pod and single-seed weight being relatively minor. Based on their SYR, two drought-sensitive varieties (Saska and OAC Drayton) and three drought-tolerant varieties (OAC Lakeview, OAC Champion, and PRO 2715R) were identified. Principal components analysis showed that drought-tolerant varieties were those that maintained relatively high water use, shoot dry matter, and pod number under stress. Varieties differed for root biomass distribution by depth, but not for soil water extraction profiles, and there was no evidence that differences in drought tolerance were associated with rooting traits among these fifteen varieties. This study helps define the physiological basis of soybean variety differences in drought tolerance, and provides novel phenotyping tools for soybean breeders to select for root function and yield formation traits that could improve soybean yield under drought stress.
Download or read book Plant Ecophysiology and Adaptation under Climate Change Mechanisms and Perspectives I written by Mirza Hasanuzzaman and published by Springer Nature. This book was released on 2020-06-01 with total page 865 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book presents the state-of-the-art in plant ecophysiology. With a particular focus on adaptation to a changing environment, it discusses ecophysiology and adaptive mechanisms of plants under climate change. Over the centuries, the incidence of various abiotic stresses such as salinity, drought, extreme temperatures, atmospheric pollution, metal toxicity due to climate change have regularly affected plants and, and some estimates suggest that environmental stresses may reduce the crop yield by up to 70%. This in turn adversely affects the food security. As sessile organisms, plants are frequently exposed to various environmental adversities. As such, both plant physiology and plant ecophysiology begin with the study of responses to the environment. Provides essential insights, this book can be used for courses such as Plant Physiology, Environmental Science, Crop Production and Agricultural Botany. Volume 1 provides up-to-date information on the impact of climate change on plants, the general consequences and plant responses to various environmental stresses.
Download or read book Water Radiation Salt and Other Stresses written by J. Levitt and published by Elsevier. This book was released on 2015-12-04 with total page 622 pages. Available in PDF, EPUB and Kindle. Book excerpt: Responses of Plants to Environmental Stresses, Second Edition, Volume II: Water, Radiation, Salt, and Other Stresses focuses on the effects of stresses on plants. This book discusses how stresses produce their damaging effects and how living organisms defend themselves against stresses. Organized into six parts encompassing 12 chapters, this edition starts with an overview of the various responses of plants to the severities of all the other environmental stresses, with emphasis on the physical and biological stresses and strains. This text then describes water stress in plants, which arise either from an excessive or from an insufficient water activity in the plant's environment. Other chapters consider the resistance to drought stress of plants. This book discusses as well the effects of flooding, which replaces gaseous air by liquid water. The final chapter deals with the comparative stress responses of plants. This book is a valuable resource for plant biologists.
Download or read book Physiological and Biochemical Changes in the Soybean Glycine Max Cultivars Essex and Forrest in Response to Water deficit Stress written by Bhunesh Kothanur and published by . This book was released on 2016 with total page 160 pages. Available in PDF, EPUB and Kindle. Book excerpt: Drought and water-deficit adversely affect plant productivity. Limited water is a multidimensional stress that induces a number of molecular, biochemical and physiological changes in affected plants. These changes include altered photosynthetic capacity, altered gas exchange and the accumulation of secondary compounds. Glycine max (L.) Merrill (soybean) is an important crop and drought is a major limitation to soybean yield world--wide. The objective of this study is to monitor the physiological and biochemical responses to water-deficit stress in seedlings of two G. max cultivars (i.e. Forrest and Essex). The responses measured are: 1) relative water content (RWC), 2) net photosynthesis, 3) stomatal conductance, 3) evaporation rate, 4) water use efficiency (WUE), 5) radiation use efficiency (RUE) and 6) trigonelline accumulation. Trigonelline is a secondary compound known to accumulate in soybean in response to salinity- and water-deficit-stress. 14 day-old seedlings of Forrest (cv.) and Essex (cv.) were grown on open benches in the SIUC greenhouse and water was withheld for six days (i.e.15-to-20 DAP). During the treatment, RWC declined in both cultivars—from 89 to 41% in Essex and 83 to 60% in Forrest. Concomitantly, net photosynthesis, stomatal conductance, evaporation rate, WUE and RUE also declined in both cultivars. As RWC declined, the amount of trigonelline increased in both cultivars—from 2.3 to 5.34 OD gFW-1 in Essex and 2.3 to 6.63 OD gFW -1 in Forrest. The data supports the idea that trigonelline may function as a compatible solute and that confirms the hypothesis that trigonelline is a biomarker for plant water status.
Download or read book Plant Environment Interaction written by Mohamed Mahgoub Azooz and published by John Wiley & Sons. This book was released on 2016-01-26 with total page 361 pages. Available in PDF, EPUB and Kindle. Book excerpt: The increase in global population, urbanization and industrialization is resulting in the conversion of cultivated land into wasteland. Providing food from these limited resources to an ever-increasing population is one of the biggest challenges that present agriculturalists and plant scientists are facing. Environmental stresses make this situation even graver. Plants on which mankind is directly or indirectly dependent exhibit various mechanisms for their survival. Adaptability of the plants to changing environment is a matter of concern for plant biologists trying to reach the goal of food security. Despite the induction of several tolerance mechanisms, sensitive plants often fail to withstand these environmental extremes. Using new technological approaches has become essential and imperative. Plant-Environment Interaction: Responses and Approaches to Mitigate Stress throws light on the changing environment and the sustainability of plants under these conditions. It contains the most up-to-date research and comprehensive detailed discussions in plant physiology, climate change, agronomy and forestry, sometimes from a molecular point of view, to convey in-depth understanding of the effects of environmental stress in plants, their responses to the environment, how to mitigate the negative effects and improve yield under stress. This edited volume is written by expert plant biologists from around the world, providing invaluable knowledge to graduate and undergraduate students in plant biochemistry, food chemistry, plant physiology, molecular biology, plant biotechnology, and environmental sciences. This book updates scientists and researchers with the very latest information and sustainable methods used for stress tolerance, which will also be of considerable interest to plant based companies and institutions concerned with the campaign of food security.
