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| | Dormancy - Wikipedia, the free encyclopedia |
 | | The first, seed coat dormancy or external dormancy, is caused by the presence of a hard seed covering or seed coat that prevents water and oxygen from reaching and activating the embryo. | | | Dormancy is a survival strategy exhibited by some temperate climate species, which enables them to survive winters. | | | The second type of dormancy, embryo dormancy or internal dormancy, is caused by a condition of the embryo which prevents germination. |
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http://www.wikipedia.org/wiki/Dormancy
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| | Royal Botanic Gardens, Kew: Millennium Seed Bank Project: Seed Dormancy |
| | Seed dormancy has evolved in plants to ensure survival from the time of seed dispersal to the time of germination and seedling establishment. | | | Dormancy occurs because some property of the seed prevents germination. | | | Seed dormancy can be defined as the failure of mature, intact seeds to germinate under favourable conditions. |
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http://www.rbgkew.org.uk/msbp/tech/dormancy.html
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| | Overcoming Seed Dormancy: Trees and Shrubs |
| | This dormancy prevents seed of many species from germinating when environmental conditions are not favorable for survival of the seedlings. | | | Seed dormancy is nature's way of setting a time clock that allows seeds to initiate germination when conditions are normally favorable for germination and survival of the seedlings. | | | Dormancy can be regulated by the environment or by the seed itself. |
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http://www.ces.ncsu.edu/depts/hort/hil/hil-8704.html
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| | HORT 101 Dormancy |
| | Dormancy in weed seeds provides a stable seed bank for the continuous presence of weeds. | | | Dormancy in different climatic regions and native plants | | | Bud dormancy in woody perennials can be controlled by a combination of mechanisms |
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http://www.hort.purdue.edu/hort/courses/HORT101Fall/dormancy.html
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| | Get Growing Gardening Tips 61- Dormancy and Plants |
| | Dormancy may be caused by the embryo being immature or though mature, germination will not occur because of the external seed coat or dormancy may be controlled by the internal physiology of the seed or a combination of internal and external dormancies may be responsible. | | | Dormancy in buds, is essential to the survival of both herbaceous and woody perennials that are exposed to our low winter temperatures. | | | For example, for some species, if moist seed is exposed to a low temperature for many days, dormancy may be broken and the seed germinated. |
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http://www.devonian.ualberta.ca/getgro61.html
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| | Seed dormancy may hold the key to fighting weeds |
| | The study of the inheritance of seed dormancy in weedy rice was presented at the 7th International Workshop on Seeds in Salamanca, Spain in May 2002 and is published in the May-June issue of Crop Science. | | | These researchers investigated the inheritance of seed dormancy in weedy strains of rice. | | | MADISON, WI, JULY 1, 2003 Weeds flourish in agricultural, urban, and natural settings because they have certain characteristics, such as seed dormancy, that provide for their persistence. |
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http://www.eurekalert.org/pub_releases/2003-07/asoa-sdm070103.php
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| | Forest Biology and Ecology for Educators |
| | Dormancy in shoots refers to a period of ceased growth and a resting bud which is typically enclosed in scales. | | | Dormancy is a phase in development which allows woody plants to survive these unfavorable conditions. | | | Understand the importance of dormancy and cold hardiness to the survival of long-lived, temperate woody plants. |
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http://www.fw.vt.edu/dendro/forestbiology/htmltext/chapter6.htm
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| | Plant Physiology Online: Types of Seed Dormancy and the Roles of Environmental Factors |
| | The second type of seed dormancy is embryo dormancy, which refers to a dormancy that is inherent in the embryo and is not due to any influence of the seed coat or other surrounding tissues. | | | Many seeds lose their dormancy when their moisture content is reduced to a certain level by drying. | | | Different types of seed dormancy also can be distinguished on the basis of the timing of dormancy onset rather than the cause of the dormancy. |
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http://www.plantphys.net/article.php?ch=t&id=8
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| | 28. Genetics of hull-imposed dormancy in rice seed |
| | Tomar, J.B. Genetics of grain dormancy in rice (Oryza sativa L.). | | | Although there are several reports on the inheritance of seed dormancy per se in rice, few have attempted the analysis of inheritance of its components, viz., embryo and hull factors (Tomar 1984; Das 1985). | | | The dehulled seeds of the parents and F\1\ plants at 30 DAH showed no dormancy, while the seeds with hull of the dormant parent and F\1\ showed dormancy. |
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http://www.gramene.org/newsletters/rice_genetics/rgn10/vXIV28.htm
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| | Seed Dormancy |
| | In the sprouting industry, dormancy is commonly referred to as a seed producing plants ability to withstand winter freezes. | | | Seed dormancy is defined as a state in which seeds are prevented from germinating even under environmental conditions normally favorable for germination. | | | As a practical matter for sprout producers, more dormant seed is generally easier to grow without having spoilage problems, especially in the summer. |
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http://www.sproutnet.com/Seed_Dormancy.htm
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| | seed germination germinating seeds planting sprouting sowing seeds |
| | Dormancy in seed species can be entirely absent or found to be generally one of two different forms of dormancy (embryonic or mechanical) or the seed type may characteristically exhibit both forms of dormancy. | | | The pretreatment of seeds is a simple process you can undertake which will help speed up the "breaking" of a seed's dormancy causing the seeds to be more susceptible to quicker more unified germination. | | | These seeds often have thick hard coats (mechanical dormancy) and the recommended extra time in warm stratification for them is meant to allow them time in a warm moist situation inorder for their coats to begin to break down (in some cases it also has an effect on the embryo). |
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http://trees-seeds.com/seed.htm
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| | Genetic Analysis of Seed Dormancy in Barley (Hordeum vulgare L.) |
| | Steptoe, produces seed with such impressive levels of dormancy that spilled grain from harvest may remain in fields for one or more years prior to germination. | | | The expression of seed dormancy in barley and other small grains has strong genetic and environmental components. | | | Quantitative trait locus analysis of seed dormancy in Steptoe barley. |
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http://hordeum.oscs.montana.edu/class/oberthur/dormancy.html
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| | Bug Biting Plants — Carnivorous Plant Care Guide |
| | Though no dormancy is required, they sometimes will die back in colder temps, putting all of their energy into a small central bud. | | | A dormancy of minimum 3-4 months is required each season, after which the plant may be ready for division or re-potting. | | | A dormancy of 4-6 months is required during winter months, during this time the previous year's pitchers will slowly deteriorate and brown. |
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http://www.bugbitingplants.com/carnivorous_plants_care.php
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| | Seed Dormancy: Seed Biology at U of KY |
| | Seed dormancy influences germination patterns in natural ecosystems and impacts persistence of seeds in cultivated fields. | | | Baskin, C.C., and Baskin, J.M. Seed dormancy in wild flowers. | | | Geneve, R.L. Impact of temperature on seed dormancy. |
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http://www.uky.edu/Projects/SeedBiology/dormancy.htm
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| | Archives of SEED-BIOLOGY-L |
| | If either the threshold is too high (some dormancy) or the water potential is too low (drought), germination is slowed or prevented, and the seeds have the chance to wait for a better opportunity. | | | Unlike dormancy induction/release, radicle protrusion does not occur in most seeds imbibed at at 5C, 35C, 40C or in low water potential (e.g., -1.2MPa) media. | | | Thus, there is a fine line in separating dormancy release from germinability and a danger of mistaking germinability for dormancy release (which is essentially the function of the changes in the embryo) in cases where embryo plays a rather passive role and dormancy is due to covering structures. |
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http://www.css.cornell.edu/seedbio/dorm7.htm
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| | The Carnivorous Plant FAQ: dormancy |
| | Sunlight is not crucial during this refrigerator dormancy, because it is like a deeper kind of dormancy. | | | If it is the middle of winter, assume your plants require more dormancy. | | | I frankly do not think this is quite as good as the normal, sunlit dormancy I described above (since my plants rarely flower) but it is an acceptable alternative. |
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http://www.sarracenia.com/faq/faq2460.html
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| | Royal Botanic Gardens, Kew: Millennium Seed Bank Project: Temperate Seed Dormancy |
| | This widening of the germination temperature range with chilling-induced dormancy release is also seen in the seeds of summer annuals. | | | The unusual nature of dormancy in this recalcitrant seed has been exploited for storage purposes. | | | Royal Botanic Gardens, Kew: Millennium Seed Bank Project: Temperate Seed Dormancy |
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http://www.rbgkew.org.uk/msbp/research/res_dormancy.html
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| | American Journal of Potato Research: Physiological Regulation of Potato Tuber Dormancy |
| | As such, dormancy is considered a survival mechanism. | | | Tubers are vegetative over-wintering organs and like many other similar organs (seeds, corms, buds), exhibit varying degrees of dormancy (Okubo 2000). | | | Because dormancy is defined by the (near) absence of growth, changes in the expression and/or activities of proteins involved in cell growth are of particular importance. |
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http://www.findarticles.com/p/articles/mi_qa4069/is_200407/ai_n9421778
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| | HEAT UNITS MAY EXPLAIN VARIATION IN DURATION OF BUD DORMANCY IN ZANTEDESCHIA |
| | Control of the growth cycle and, in particular, dormancy, is required if growers are to produce flowering plants of Zantedeschia at any chosen time of year. | | | Results were compared to two previous studies where the duration of dormancy was similarly quantified, but where plants were grown under different environments and seasons. | | | In contrast, plants ex-flasked in November exhibited dormancy from February through to April/May. When results were compared with previous studies dormancy collectively extended over seven calendar months (November to May), with no overlap in timing between plantings in different seasons. |
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http://www.actahort.org/books/618/618_55.htm
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| | The Venus Flytrap |
| | I have some Flytraps which are growing what appears to be their fall leaves, but, strangely, are not showing signs of dormancy at all (This could also be that these plants were put into dormancy during another stage of their growing cycle). | | | The theory states, that the traps of the VFT grow the largest during the summer months; however, I have one plant that went into a very short dormancy period, and it is now growing its largest traps on hart shaped short spring leaves. | | | If you want your plant to grow the healthiest, it is better to leave the plant in the pot that it is growing during dormancy. |
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http://www.strato.net/~crvny/sa03005.html
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| | PAG-X: TOWARD CLONING SEED DORMANCY GENES FROM Oryza sativa WEEDY RICE |
| | Genetic analysis based on the germination at 30°C and 100% RH at 0, 20, 40, and 60 days after harvest (DAH) revealed that the broad sense heritabilities for the seed covering-imposed dormancy were 71, 94, 90, and 87%, respectively, in the mapping population. | | | plants demonstrated that dormancy is controlled by the maternal genotype. | | | To clone and characterize dormancy genes in cereal crops, a weedy rice strain 'SS18-2' was selected as the gene donor. |
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http://www.intl-pag.org/10/abstracts/PAGX_P321.html
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| | Protection from disease and radiation (from dormancy) -- Encyclopædia Britannica |
| | More from Britannica on "Protection from disease and radiation (from dormancy)"... | | | Protection from disease and radiation (from dormancy) -- Encyclopædia Britannica | | | Dormancy, hibernation, and estivation in warm-blooded vertebrates > Physiological changes during mammalian hibernation > Protection from disease and radiation |
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http://www.britannica.com/eb/article-48545?tocId=48545
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| | 2nd International Symposium on Plant Dormancy |
| | Jullien M. Control of seed dormancy on Nicotiana plumbaginifolia. | | | Koornneef M. The genetics of seed dormancy in Arabidopsis | | | controlling the development of cultivated plants and regulating their productivity often requires the refinement of some kind of dormancy process, either by maintaining, avoiding or suppressing it. |
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http://laurel.nal.usda.gov:8080/agnic/mtg/1999/2ispd.html
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| | The Carnivorous Plant FAQ: Dormancy |
| | If you attempt to grow a plant that anticipates a resting period, you must respect its dormancy requirements or else the plant will simultaneously try to both grow and rest, and in the resulting confusion it will die. | | | When you are trying to determine what kind of dormancy conditions you should provide, think about the native habitat for these plants. | | | Simultaneously, the delicate pygmy species stop growing and try to survive the heat and desiccating winds by hiding within the shade of their dead leaves and stipules from the previous season's growth. |
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http://www.sarracenia.com/faq/faq3480.html
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| | Tumor Dormancy and Cell Signaling. V. Regrowth of the BCL1 Tumor After Dormancy Is Established -- Vitetta et al. 89 (12): 4425 -- Blood |
| | We found that, in the majority of mice, escape was due to the emergence of genetic variants that were no longer susceptible to the anti-Id-mediated induction of dormancy. | | | Rather, a state of dormancy was caused by the failure of the existing DLC population to expand, ie, cells were dividing and dying at the same rate and/or were cell cycle-arrested. | | | Even more striking examples of dormancy can be observed in melanoma and breast cancer, where there appears to be a steady rate of recurrence 10 to 20 years after the removal of a primary breast carcinoma and the recurrent tumor frequently grows at a rapid rate. |
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http://www.bloodjournal.org/cgi/content/full/89/12/4425
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