Effects of Priming, Dormancy and Aging on Embryo Growth Potential and Germination of Tomato (Lycopersicon Esculentum Mill.) and Lettuce (Lactuca Sativa L.) Seeds PDF Download
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Author: Gokhan Hacisalihoglu
Publisher:
ISBN:
Category :
Languages : en
Pages : 202
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Author: Gokhan Hacisalihoglu
Publisher:
ISBN:
Category :
Languages : en
Pages : 202
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Author: Peetambar Dahal
Publisher:
ISBN:
Category :
Languages : en
Pages : 172
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Author: Ana Daniela Alvarado
Publisher:
ISBN:
Category :
Languages : en
Pages : 270
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Author: Gamil Antoun Kabbabe
Publisher:
ISBN:
Category :
Languages : en
Pages : 192
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Author: Veronica M. Valdes
Publisher:
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Category :
Languages : en
Pages : 224
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Author: Andres Ricardo Schwember
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Category :
Languages : en
Pages :
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Lettuce (Lactuca sativa L.) seeds have poor longevity in storage and exhibit thermoinhibition, or failure to germinate above ~25°C. Seed priming (controlled hydration followed by drying) increases the upper temperature limit (UTL) of germination, but also reduces seed longevity. To explore the connections between seed priming and seed aging, quantitative trait locus (QTL) analyses of seed priming responses and seed aging were conducted using a recombinant inbred line (RIL) population derived from a cross between L. sativa cv. Salinas x L. serriola accession UC96US23. A single QTL that was responsible for 47% of the phenotypic variation in UTL due to priming collocated with Htg6.1, a major QTL from UC96US23 associated with high temperature germination capacity. Introgression of this Htg6.1 locus into the Salinas cultivar enhanced its responsiveness to priming. This locus contains LsNCED4, a gene encoding a key enzyme in the abscisic acid biosynthetic pathway. Primed seeds exhibited reduced expression of LsNCED4 and increased expression of LsGA3ox1 and LsACS1 (genes encoding regulated enzymes in the gibberellin and ethylene biosynthetic pathways, respectively) compared to non-primed seeds when imbibed at high temperatures. As seeds stored under conventional low humidity and temperature conditions lose viability slowly (i.e., over months or years), the controlled deterioration (CD) test often is utilized to study seed longevity by aging seeds rapidly at elevated temperature and relative humidity. Multiple longevity-associated QTLs were identified using both conventional and CD storage conditions in the same RIL population described above grown in two different years. The QTLs varied with both production environments and aging conditions, and no correlation was found between the seed longevity under conventional and CD conditions for either control or primed seeds. Thus, lettuce seed longevity exhibits strong genotype by environment interactions and CD tests may not be predictive of how lettuce seeds would age under conventional storage conditions. As reactive oxygen species are proposed to be involved in seed aging, the longevity of control and primed lettuce and onion (Allium cepa L.) seeds was assessed when stored in ambient and low oxygen atmospheres. Anaerobic conditions extended seed longevity, particularly under conventional storage conditions.
Author: Cosme Albert Argerich
Publisher:
ISBN:
Category :
Languages : en
Pages : 276
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Author: Susana Araújo
Publisher: BoD – Books on Demand
ISBN: 953512658X
Category : Technology & Engineering
Languages : en
Pages : 214
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Book Description
New Challenges in Seed Biology - Basic and Translational Research Driving Seed Technology combines different aspects of basic and translational research in seed biology. A collection of eight chapters written by seed biology experts from the field of seed physiology, ecology, molecular biology, biochemistry, and seed technology was gathered. We hope that this book will attract the attention of researchers and technologists from academia and industry, providing points for interactive and fruitful discussion on this fascinating topic.
Author: Andrés R. Schwember
Publisher:
ISBN:
Category :
Languages : en
Pages : 156
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Author:
Publisher: Academic Press
ISBN: 0080563740
Category : Technology & Engineering
Languages : en
Pages : 295
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Book Description
Written by international authorities in agronomy, Volume 61 contains five comprehensive reviews covering key contemporary topics on crop and soil sciences. As always, the topics are varied and exemplary of the array of subject matter covered by this long-running serial. In this volume, a definitive treatise on dynamic conservation of plant genetic resources is included, as is an environmentally timely update on coal surface mine reclamation practices; contemporary and thorough reviews of diffusion in the soil-plant system, dorminancy, germinability, and germination in crop and weed seeds, and control of soil-borne plant pests. With this latest volume, Advances in Agronomy continues to be recognized as a leading reference and as a first-rate source of the latest research in agronomy, crop science, and soil science. - The control of soil-borne plant pests - Ion-diffusion in the soil-plant system - Dormancy, germinability, and germination in crop and weed seeds - Dynamic conservation of plant genetic resources - Coal surface mine reclamation
