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Thursday, November 19, 2020 | History

2 edition of After-ripening and germination of Juniperus seeds ... found in the catalog.

After-ripening and germination of Juniperus seeds ...

Dean Alvin Pack

After-ripening and germination of Juniperus seeds ...

  • 92 Want to read
  • 4 Currently reading

Published in [Chicago .
Written in English

    Subjects:
  • Juniper.,
  • Germination.

  • Edition Notes

    Statementby Dean Alvin Pack ...
    SeriesContributions from the Hull Botanical Laboratory ;, 275.
    Classifications
    LC ClassificationsQK740 .P3
    The Physical Object
    Pagination1 p.l., p. 32-60.
    Number of Pages60
    ID Numbers
    Open LibraryOL6634117M
    LC Control Number21007576


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After-ripening and germination of Juniperus seeds ... by Dean Alvin Pack Download PDF EPUB FB2

After-ripening and germination of Juniperus seeds. book AND GERMINATION OF JUNIPERUS SEEDS CONTRIBUTIONS FROM THE HULL BOTANICAL LABORATORY DEAN A. PACK (WITH ONE FIGURE) Some seeds fail to germinate in compensating percentages or even at all when placed under ordinary germination conditions.

After-ripening And Germination Of Juniperus Seeds [Pack, Dean Alvin] on *FREE* shipping on qualifying offers.

After-ripening And Germination Of Juniperus Seeds Cited by: Seeds of most Juniperus spp. are characterized as long-lived because germination can be delayed for several years by embryo dormancy, a pericarp covering the seed, an impermeable seed coat that interferes with imbibition, and/or the presence of germination inhibitor(s) (Johnsen and Alexander ).

However, the germination. The results of this study, and in particular, the gap between viability and germination percentages, suggest that seeds of J. macrocarpa are dormant. None of the applied pre-treatments improved germination or widened the range of temperatures in which germination can occur.

Several authors previously reported seeds of Juniperus asCited by: 6. insularis seeds germinated, with percentages up to 60%, in a wide range of temperatures ( °C), and neither light nor dry after-ripening affected final germination percentages.

Uptake and metabolism of dormancy-breaking compounds is, or can be, very rapid and the importance of establishing the time course of dormancy-breaking, as opposed to germination events, is emphasized. After-ripening, germination, and vitality of seeds of Sorbus aucuparia L.

Contr. Boyce Thompson Inst. 3, – (). Google Scholar Flemion, F.: Physiological and chemical studies of after-ripening of Rhodotypos kerrioides by: For all germination tests, germination capacity (GC) and mean germination time (MGT) were calculated as follows: GC (%) ¼ ðNo.

germinated seeds/total No. ofseeds sownÞ MGT (days) ¼ Rðti ni Þ=Rni where ti is the number of days starting from the date of sowing and ni is the number of seeds germinated at each day (Bewley and Black ). Pack conducted laboratory germination studies on juniper (Juniperus spp.) and found that seed requires an after-ripening period at temperatures of 32 to 50 °F ( °C).

The stratification period was approximately days at 41 °F (5 °C). After-ripening and germination of Juniperus seeds. Contributions from the Hull Botanical Labora-tory (with one figure) - - - - Dean A.

Pack 32 Gametophyte and sex organs of Reboulia hemi-sphaerica. Contributions from the Hull Botani-cal Laboratory (with twenty-one figures) - Arthur W. Haupt 6i A chemical and physiological study of. Seed germination: definition and reviews. Seed germination: Germination of seeds is a complex physiological process triggered by imbibition of water after possible dormancy mechanisms have been released by appropriate triggers (see webpage "Seed Dormancy").Under favorable conditions rapid expansion growth of the embryo culminates in rupture of the covering layers and emergence of the.

Physiological Processes in Forest Tree Seeds during Maturation, Storage, and GerminationCited by: The Biodiversity Heritage Library works collaboratively to make biodiversity literature openly available to the world as part of a global biodiversity community. After-Ripening and Germination of Juniperus Seeds.

Vol Page 32 If you are generating a PDF of a journal article or book chapter, please feel free to enter the title and. purity, about 60% germination, 54% Pure Live Seed (PLS), and an estima seeds per pound (Pater ).

Propogration by seed: Plant seed 1 to 2 cm deep; preferably by drilling in a well prepared, firm seedbed. Always mix the seeds with other species when re-vegetating game ranges to help controlFile Size: 75KB.

Germination of seeds of Juniperus virginiana L. Contrib. Boyce Thompson Inst. 16, – (). Google Scholar Bennett, J. P., and F. Skoog: Preliminary experiments on the relation of growth-promoting substances to the rest period in fruit by: 3. The effects of gases from a burning coal seam on morphological and terpenoid characters in Juniperus scopulorum (Cupressaceae).

The Southwestern Naturalist. 27(3): [] 4. Adams, Robert P. Infraspecific terpenoid variation in Juniperus scopulorum: evidence for Pleistocene refugia and recolonization in western North America.

Taxon. The blue fleshy covering aids in the dispersal of seeds with over 30 birds consuming the juniper berries. Birds are critical to the germination of seeds because juniper seeds don’t germinate unless the fleshy covering is dissolved, which happens when the berries pass through the digestive tract of birds or animals.

We cannot exclude a loss of viability or a loss of dormancy due to after-ripening because seeds were not studied directly after harvesting (Baskin and Baskin, ). However, this is what normally happens under Mediterranean climate, where seeds after-ripen in dry summer and germinate in autumn after the first rains or after ploughing (Baskin Cited by: To facilitate the restoration of disturbed vegetation, seeds of wild species are collected and held in dry storage, but often there is a shortage of seeds for this purpose.

Thus, much research effort is expended to maximize the use of the available seeds and to ensure that they are nondormant when sown. Sowing nondormant (versus dormant) seeds in the field should increase the success of the. GENERAL DISTRIBUTION: Eastern redcedar is the most widely distributed conifer of the East and grows in all states east of the Great Plains [11,61].Its range extends from southwestern Maine to southern Minnesota and the Dakotas, southward to western Nebraska and central Texas, and eastward to northern Florida and Georgia [].Eastern redcedar has expanded into the Great Plains through the.

F, which is caused by a postharvest dormancy or after-ripening period. Temperatures (soil and air) often exceed 60 F in late June into July when seeds are first shed and the after-ripening period provides an ecological advantage to downy brome by avoiding precocious germination shortly after dispersal and subsequent seedling desiccation and.

This banner text can have markup. web; books; video; audio; software; images; Toggle navigation. The evolution of larger embryo size likely resulted in occurrence of nondormant seeds; the embryo did not need to grow before germination. It is thought that increased relative embryo size is one of the main determinants (or requirements) for the evolution of other classes of seed dormancy (Finch‐Savage & Leubner‐Metzger, ).Cited by: Cones mature in August; seeds are dispersed September through November.

Propagation: Seeds of Western Red Cedar do not require a stratification period, however, a stratification period at 40ºF (4ºC) for 60 days may aid germination in dormant seeds. Seeds. Seed banking: Rocky Mountain juniper seeds do not germinate during the 1st spring following maturity, but germinate freely during the 2nd spring.

The seeds require an "after-ripening" period of months, during which moisture and chemical changes occur within the seeds [11,65,78,]. Evolutionary anachronism is a concept in evolutionary biology, named by Connie C. Barlow in her book The Ghosts of Evolution (), to refer to attributes of living species that are best explained as a result of having been favorably selected in the past due to coevolution with other biological species that have since become this context is removed, the said attributes appear as.

Guide to the Henry Ives Baldwin Papers, Collection number: MC Size: 34 boxes ( ) About Henry Ives Baldwin () Henry Ives Baldwin was. Golden Anniversary. 50 Years - von Leonard Seed Co. [Ed.]: und eine große Auswahl ähnlicher Bücher, Kunst und Sammlerstücke erhältlich auf High seedling vigor and seeds require after-ripening for maximum germination.

Seedlings are vulnerable to spring frosts. SEEDING RECOMMENDATIONS: Plant in the fall a depth at of in. Hand seed PLS lb per hill at 5 ft spacing.

There seeds per lb. James Stubbendieck et al. () seeds from plants in temperate regions will require wet period followed by cold before they germinate. Seed germination some splants require mechanical dame, such as digestion or degradation of seed coat before they germinate. Maximum germination of Phellodendron seeds required alternating exposures to high temperature (35[degrees]C, 8 hours in light) and low temperature (10[degrees]C, in darkness) (Lin et al., ).

Convincing evidence also indicates that certain constituents of smoke can serve as a germination cue in many seeds. Evolutionary anachronism is a concept in evolutionary biology, named by Connie C.

Barlow in her book The Ghosts of Evolution (), [1] to refer to attributes of living species that are best explained as a result of having been favorably selected in the past due to coevolution with other biological species that have since become this context is removed, said attributes appear as.

3 Proceedings: Wildland Shrub and Arid Land Restoration Symposium Las Vegas, NV, OctoberCompilers: Bruce A. Roundy, Professor, Department of Botany and Range Science, Brigham Young University, Provo, UT.

Formerly at School of Renewable Natural Resources, University of. Burrows, C.J.(): Germination requirements of the seeds of native trees, shrubs, and vines.

Canterbury Botanical Jour 42– Burrows, C.J.(): Germination behavior of the seeds of the New Zealand species Aristotelia serrata, Coprosma robusta, Cordyline australis, Myrtus obcordata, and Schefflera digitata. 12th European Ecological Federation Congress Jointly with the: 10th Annual Conference of the Spanish Association for Terrestrial Ecology 13th Annual Meeting of the Portuguese Ecological Society 3rd Iberian Congress of Ecology SeptemberÁvila (Spain) Publisher: Asociación Española de Ecología Terrestre, (AEET) C/ Tulipán s/n,Móstoles, Madrid, Spain Deadline editorial.

Seeds were 4 month-old; the germination for Smoke and KAR1 treatments were nearly % when using 2 year-old seeds (after-ripening). For details see [1]. References [1] Tavşanoğlu Ç, Ergan G, Çatav ŞS, Zare G, Küçükakyüz K, Özüdoğru B.

Sustainable production of crops for food, feed, fiber, industrial or medicinal/nutriceutical uses is threatened by many forces, including climate change, social or political instability, and natural resource constraints.

Plant genetic resources (or germplasm) in the form of seeds and plants provide the raw materials that scientists use to address crop production challenges, develop new crops. Issuu is a digital publishing platform that makes it simple to publish magazines, catalogs, newspapers, books, and more online.

Easily share your publications and get them in front of Issuu’s. The capsule is three-celled, and when the seeds are ripe each cell splits down the side to release the shining black seeds. The Genus Scilla belongs to the Natural Order Liliaceæ; its name is classical, and probably derived from the Greek Skyllo, to annoy, in allusion to the bulbs being poisonous.

The germination of primulas showed a negative or neutral response to the density of seeds sown. They also showed intrinsic seed-dormancy which can be overcome by chilling treatment. Most of the species tested had significantly higher percentage germination in a diurnally fluctuating temperature regime than at 15ºC constant : Thaweesakdi Boonkerd.

They observed that after 1 year, germination and seed recovery accounted for 69% and 57% of the original 1, seeds sown, for plumed and plumeless seeds, respectively.

Of the seeds recovered, over 80% were damaged or degraded by microbial or insect activity.Full text of "Bulletin of the Torrey Botanical Club" See other formats.Pawnee the seeds are used for perfume and as a love charm. In cases of fever and headache the seeds are crushed with an elm-wood pestle in a mortar hollowed out of the same wood.

The resulting powder is put into hot water and the infusion is drunk. For use as a love charm the pulverized seeds are rubbed in the palms, and the suitor contrives to.