Download or read book Vegetative Growth and Production Attributes of North American Cultivars with Differing Vernalization and Growth Temperature Regimes written by John Marc Rariden and published by . This book was released on 1993 with total page 136 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Proceedings of the 2nd International Strawberry Symposium written by J. L. Maas and published by . This book was released on 1993 with total page 524 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Horticultural Abstracts written by and published by . This book was released on 1995 with total page 2304 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Bibliography of Agriculture written by and published by . This book was released on 1976 with total page 1732 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Seasonal Cold Hardiness Deacclimation Kinetics and Dormancy Completion in Cold climate Hybrid Grapevine written by Michael Geiger North and published by . This book was released on 2021 with total page 147 pages. Available in PDF, EPUB and Kindle. Book excerpt: Dormancy and cold hardiness are critical adaptations for temperate woody perennial species to survive winter freezing stress. Grapevine (Vitis spp.) buds avoid freeze injury by supercooling water in their buds, which is a seasonally dynamic process and is related to dormancy mechanisms. There is high variability in traits related to dormancy and cold hardiness across grapevine species. Grapevine breeders have developed interspecific hybrid grapevine cultivars that combine desirable fruit quality and cold hardiness traits. These hybrids, referred to as cold-climate cultivars, have propelled the expansion of grapevine production into regions that were previously limited by annual low temperatures. However, cold-climate cultivars are still susceptible to freeze injury. Moreover, climate change predictions indicate new winter challenges, such as erratic and extreme weather events and generally warmer winter weather. Therefore, more information regarding cold hardiness and dormancy traits in cold-climate cultivars is needed. The research targeted in this dissertation aimed to characterize important dormancy and cold hardiness traits in five cold-climate cultivars.The lower temperature limit for bud cold hardiness changes across the seasons. Continuous, time-series cold hardiness data were collected to establish a foundation for cold hardiness abilities in individual cold-climate cultivars. The research presented in Chapter 2 characterized changes in bud cold hardiness for five cold-climate cultivars to identify relative risk for freeze injury throughout the dormant period and the factors regulating cold hardiness changes. This research also optimized and evaluated a bud cold hardiness prediction model for the same cultivars grown in a cold-climate region. We determined ambient temperature is the most important factor that regulates hybrid grapevine cold hardiness changes, and cultivars respond to temperature signals at varying degrees. We also calculated highly accurate cold hardiness predictions after reparametrizing a prediction model for each cold-climate cultivar. This information can guide cultivar selection decisions for particular growing regions and provides a framework for future studies concerning the physiological and mechanistic processes of grapevine cold hardiness. In addition, this work can strengthen decision making for improved bud cold hardiness protection, especially in cold-climate growing regions. The loss of cold hardiness i.e., deacclimation during spring is one of the most critical causes of freeze injury and is a determinant of budbreak phenology. Research presented in Chapter 3 evaluated the effect of chill unit accumulation and ambient temperature on dormancy status, deacclimation responses, and budbreak in five cold-climate cultivars grown in a cold climate region. In addition, this research validated a method for quantifying the contribution of chill unit accumulation to dormancy transitions. We observed deacclimation responses that increased continuously as chill units accumulated. This continuum of deacclimation responses was quantified as a rate ratio, referred to as deacclimation potential. Deacclimation potential provides an advantageous alternative method to assess dormancy status by quantifying a bud growth phenotype that is linked to growth but proceeds externally visible bud enlargement/elongation. We also observed a logistic trend between deacclimation rates and ambient temperature, referred to as the relative thermal contribution. Within an optimal temperature range, higher temperatures triggered higher deacclimation rates. However, changes in temperature have diminishing effects on deacclimation rates above and below that optimal range. Furthermore, deacclimation occurred at low temperatures, as low as 0°C. Relative thermal contribution can inform adjustments to base temperatures and patterns of temperature effects in models predicting phenological development and cold hardiness changes, especially for species that deacclimate at low temperatures. Finally, the effects of both chill unit accumulation and ambient temperature were combined in a predictive model that accurately describes deacclimation kinetics across the dormant period. Prolonged exposure to chilling temperature is needed to overcome endodormancy and the duration of endodormancy can be quantified as a chilling requirement. Research presented in Chapter 4 evaluated freezing temperature contribution towards endodormancy completion and aimed to determine chilling requirements for five cold-climate cultivars. We suspect freezing temperatures were effective in promoting endodormancy completion for hybrid grapevine cultivars. Therefore, chill models will need to be adapted to include freezing temperatures for more accurate estimation of chill requirements. Furthermore, we observed budbreak at a similar number of days and within the endodormancy threshold for buds exposed to different chill treatments, while their cold hardiness levels differed by approximately twofold. Cultivar-specific chilling requirements reported in this study do not represent an absolute chill requirement that is transferrable across regions or from year-to-year. Instead, estimated chill requirements likely represent a combination of traits involved in both dormancy status and deacclimation capacity. Therefore, future research that characterizes endodormancy completion should complement bud forcing assays with cold hardiness evaluation and/or deacclimation potential to verify dormancy status interpretations.

Download or read book Crop Physiology Abstracts written by and published by . This book was released on 1999 with total page 980 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Plant Breeding Abstracts written by and published by . This book was released on 1990 with total page 1136 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Agronomy Abstracts written by and published by . This book was released on 1995 with total page 1348 pages. Available in PDF, EPUB and Kindle. Book excerpt: Includes abstracts of the annual meetings of the American Society of Agronomy; Soil Science Society of America; Crop Science Society of America ( - of its Agronomic Education Division).

Download or read book Bibliography of Agriculture with Subject Index written by and published by . This book was released on 2000 with total page 962 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Agrindex written by and published by . This book was released on 1995 with total page 880 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Bibliography of Agriculture written by and published by . This book was released on 1990-11 with total page 628 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Durum Wheat Breeding written by Conxita Royo and published by CRC Press. This book was released on 2005-11-07 with total page 571 pages. Available in PDF, EPUB and Kindle. Book excerpt: Is your knowledge about this important grain crop up to date? This comprehensive two-volume resource reviews the latest advances in scientific and technical knowledge for durum wheat breeding. With a scope of coverage that includes genetics and molecular biology, plant and crop physiology, and breeding strategies and methodology, Dur

Download or read book Biological Abstracts written by Jacob Richard Schramm and published by . This book was released on 1974 with total page 1108 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Crop Photosynthesis written by N.R. Baker and published by Elsevier. This book was released on 2013-10-22 with total page 471 pages. Available in PDF, EPUB and Kindle. Book excerpt: Since photosynthetic performance is a fundamental determinant of yield in the vast majority of crops, an understanding of the factors limiting photosynthetic productivity has a crucial role to play in crop improvement programmes. Photosynthesis, unlike the majority of physiological processes in plants, has been the subject of extensive studies at the molecular level for many years. This reductionist approach has resulted in the development of an impressive and detailed understanding of the mechanisms of light capture, energy transduction and carbohydrate biosynthesis, processes that are clearly central to the success of the plant and the productivity of crops. This volume examines in the widest context the factors determining the photosynthetic performance of crops. The emphasis throughout the book is on the setting for photosynthesis rather than the fundamental process itself. The book will prove useful to a wide range of plant scientists, and will encourage a more rapid integration of disciplines in the quest to understand and improve the productivity of crops by the procedures of classical breeding and genetic manipulation.

Download or read book Cotton Physiology written by Jack R. Mauney and published by . This book was released on 1986 with total page 840 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book The Strawberry written by and published by . This book was released on 2003 with total page 264 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book The Regional Impacts of Climate Change written by Intergovernmental Panel on Climate Change. Working Group II. and published by Cambridge University Press. This book was released on 1998 with total page 532 pages. Available in PDF, EPUB and Kindle. Book excerpt: Cambridge, UK : Cambridge University Press, 1998.