The Effects of Low Temperature on Seedling Growth of Maize Genotypes PDF Download
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Author:
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Category : Corn
Languages : en
Pages :
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Author:
Publisher:
ISBN:
Category : Corn
Languages : en
Pages :
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Author:
Publisher:
ISBN: 9789022009307
Category : Agriculture
Languages : en
Pages : 124
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Author: Bruce Alan Orman
Publisher:
ISBN:
Category :
Languages : en
Pages : 292
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Author: Philip Augustus Lehenbauer
Publisher:
ISBN:
Category : Corn
Languages : en
Pages : 52
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Author: Jon Anthony Musgrave
Publisher:
ISBN:
Category :
Languages : en
Pages : 128
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Chilling air and soil temperatures greatly impact the germination ability of early planted crop species. Breeding maize (Zea mays L.) inbreds to be more tolerant of chilling conditions may improve seedling growth in stressful northern latitude seedbeds, decrease exposure to water stress, maximize available photon flux density (PFD), and create higher potential yields. An emphasis on cold-tolerance by maize breeders may have resulted in a substantial shift downward in the baseline temperature for maize germination and plant development. The focus of this research was to examine the respiration and net photosynthetic responses of eight inbred maize genotypes representing a range in field vigor while grown at or subjected to 6°, 8°, 10°, 12°, and 25°C.
Author: Claire S. Ting
Publisher:
ISBN:
Category : Corn
Languages : en
Pages : 534
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Author: Mark Alan Bennett
Publisher:
ISBN:
Category : Corn
Languages : en
Pages : 262
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Gabry lives a quiet life. As safe a life as is possible in a town trapped between a forest and the ocean, in a world teeming with the dead, who constantly hunger for those still living. She's content on her side of the Barrier, happy to let her friends dream of the Dark City up the coast while she watches from the top of her lighthouse. But there are threats the Barrier cannot hold back. Threats like the secrets Gabry's mother thought she left behind when she escaped from the Sisterhood and the Forest of Hands and Teeth. Like the cult of religious zealots who worship the dead. Like the stranger from the forest who seems to know Gabry. And suddenly, everything is changing. One reckless moment, and half of Gabry's generation is dead, the other half imprisoned. Now Gabry only knows one thing: she must face the forest of her mother's past in order to save herself and the one she loves.
Author: Omar Nazhan Ali
Publisher:
ISBN:
Category :
Languages : en
Pages : 66
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Early planting is one technique to avoid or reduce heat and drought problems that negatively affecting grain crop production. If producers adopt early planting, cold temperatures may negatively affect corn yield. It is important to select hybrids that are suited for planting earlier in the southern United States. Experiments were conducted by imposing low temperatures during seed germination. Twenty commercially available corn hybrids were evaluated for seed germination and root elongation. The first objective was: 1) To determine if some hybrids germinate better at cooler temperatures than others; and 2) Determine variation in root elongation at cold temperatures among commercially available hybrids. Corn hybrids varied significantly for seed germination and root traits under cold temperatures. Some hybrids have significantly surpassed others in seed germination traits, and they germinated earlier as well having longer radicle length. Also, there were significant differences across temperatures for all traits measured. A second objective was: 1) To quantify the effects of cold temperature on seed germination rate; 2) To evaluate the effects of different cold temperatures on seed germination behavior of corn hybrids under laboratory conditions to determine how fast they germinated; and 3) To classify hybrids for response to cold temperature using cumulative seed germination. The results showed that standard germination performance occurred at 10oC for all hybrids, but these hybrids performed well under other cold treatments (7.2°C and 8.6° C). There were no big differences between early hybrids 93 to 105 RM (Relative Maturity) and full season 115 to 120 RM in germination % and rate in both experiments, so that means that it pretty much depends on the hybrid. Therefore, the temperature had a major influence on seed germination parameters. These findings are useful for hybrid selection with respect to cool soil temperature conditions during early planting.
Author: Muhammad Aslam
Publisher: Springer
ISBN: 3319254421
Category : Science
Languages : en
Pages : 79
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This book focuses on early germination, one of maize germplasm most important strategies for adapting to drought-induced stress. Some genotypes have the ability to adapt by either reducing water losses or by increasing water uptake. Drought tolerance is also an adaptive strategy that enables crop plants to maintain their normal physiological processes and deliver higher economical yield despite drought stress. Several processes are involved in conferring drought tolerance in maize: the accumulation of osmolytes or antioxidants, plant growth regulators, stress proteins and water channel proteins, transcription factors and signal transduction pathways. Drought is one of the most detrimental forms of abiotic stress around the world and seriously limits the productivity of agricultural crops. Maize, one of the leading cereal crops in the world, is sensitive to drought stress. Maize harvests are affected by drought stress at different growth stages in different regions. Numerous events in the life of maize crops can be affected by drought stress: germination potential, seedling growth, seedling stand establishment, overall growth and development, pollen and silk development, anthesis silking interval, pollination, and embryo, endosperm and kernel development. Though every maize genotype has the ability to avoid or withstand drought stress, there is a concrete need to improve the level of adaptability to drought stress to address the global issue of food security. The most common biological strategies for improving drought stress resistance include screening available maize germplasm for drought tolerance, conventional breeding strategies, and marker-assisted and genomic-assisted breeding and development of transgenic maize. As a comprehensive understanding of the effects of drought stress, adaptive strategies and potential breeding tools is the prerequisite for any sound breeding plan, this brief addresses these aspects.
Author: Owen Archuel Porter
Publisher:
ISBN:
Category : Corn
Languages : en
Pages : 246
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