Plants Hardiness
Mostrando 25-35 de 35 artigos, teses e dissertações.
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25. Direct Relation Between Growth and Frost Hardening in Cabbage Leaves 1
Potted cabbage plants were grown in growth chambers at 25° day and 15° night and hardened successively at 5, 0, and −3°. Leaf growth was determined by measuring leaf area, hardiness by freezing at a series of temperatures and determining percent survival. Leaf growth increased progessively with leaf number, reaching a maximum rate of growth and final ar
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26. Phytochrome Control of Growth Cessation and Initiation of Cold Acclimation in Selected Woody Plants 1
Short day enhancement of cold acclimation in twigs of Cornus (red-osier dogwood), Weigela, and Pyracantha (firethorn) was studied using dark interruptions with red or with red-far red radiation. Hardiness was estimated by freezing stem tissues to preselected temperatures and evaluating injury electrolytically. Dark-period interruptions with red radiation sup
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27. Effects of Decenylsuccinic Acid on 32P Uptake and Translocation by Barley and Winter Wheat
After 3 days of exposure to 10−3 and 10−4 M decenylsuccinic acid, winter wheat plants wilted and died. Decenylsuccinate at 10−3 M inhibited 32P uptake by barley roots and wheat roots and resulted in significant (P ≤ 0.05) leakage of previously absorbed 32P and total phosphorus (barley roots). Decenylsuccinate effects on 32P uptake and retention were
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28. The Environmental Control of Cold Acclimation in Apple 1
The role of photoperiod and temperature in the cold acclimation of living Haralson apple (Pyrus malus L.) bark was studied in the autumn under field conditions in Minnesota. Whole trees, or different parts of the same tree, were exposed to either natural conditions, artifically lengthened days, or artificially warmed nights, or they were subjected to manual
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29. Localization of Expression of Three Cold-Induced Genes, blt101, blt4.9, and blt14, in Different Tissues of the Crown and Developing Leaves of Cold-Acclimated Cultivated Barley1
Tissues expressing mRNAs of three cold-induced genes, blt101, blt14, and blt4.9, and a control gene, elongation factor 1α, were identified in the crown and immature leaves of cultivated barley (Hordeum vulgare L. cv Igri). Hardiness and tissue damage were assessed. blt101 and blt4.9 mRNAs were not detected in control plants; blt14 was expressed in co
American Society of Plant Physiologists.
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30. Barley Cbf3 Gene Identification, Expression Pattern, and Map Location1
Although cold and drought adaptation in cereals and other plants involve the induction of a large number of genes, inheritance studies in Triticeae (wheat [Triticum aestivum], barley [Hordeum vulgare], and rye [Secale cereale]) have revealed only a few major loci for frost or drought tolerance that are consistent across multiple genetic backgrounds and envir
American Society of Plant Physiologists.
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31. Protoplasts Surviving Freezing to −196 C and Osmotic Dehydration in 5 Molar Salt Solutions Prepared from the Bark of Winter Black Locust Trees 1
Free protoplasts were prepared from the living bark tissue of the trunk of summer and winter black locust trees by enzymic digestion of thin slices of the tissue for 3 hours in a medium containing 2% Onozuka cellulase, 2% Rhozyme pectinase, and 2% Driselase in mannitol solutions using 0.4 molar mannitol for summer tissue and 1.0 molar mannitol for winter tis
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32. Regulation of a Wheat Actin-Depolymerizing Factor during Cold Acclimation1
We have previously shown that the wheat (Triticum aestivum) TaADF gene expression level is correlated with the plants capacity to tolerate freezing. Sequence analysis revealed that this gene encodes a protein homologous to members of the actin-depolymerizing factor (ADF)/cofilin family. We report here on the characterization of the recombinant TaADF pro
American Society of Plant Physiologists.
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33. Effects of an Intercultivaral Chromosome Substitution on Winterhardiness and Vernalization in Wheat
During a study on the genetic control of winterhardiness in winter wheat (Triticum aestivum L. group aestivum), a gene that affected vernalization was found on chromosome 3B in the winter wheat cultivar `Wichita.' When chromosome 3B from Wichita was substituted into the winter wheat cultivar `Cheyenne,' the resultant substitution line exhibited a spring grow
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34. Identification of dehydrin-like proteins responsive to chilling in floral buds of blueberry (Vaccinium, section Cyanococcus).
The level of three major polypeptides of 65, 60, and 14 kD increased in response to chilling unit accumulation in floral buds of a woody perennial, blueberry (Vaccinium, section Cynaococcus). The level of the polypeptides increased most dramatically within 300 h of chilling and decreased to the prechilling level with the initiation of budbreak. Cold-hardines
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35. Short-Day Potentiation of Low Temperature-Induced Gene Expression of a C-Repeat-Binding Factor-Controlled Gene during Cold Acclimation in Silver Birch1[w]
Development of winter hardiness in trees is a two-stage process involving sequential perception of distinct environmental cues, short-day (SD) photoperiod and low temperature (LT). We have shown that both SD and LT are recognized by leaves of silver birch (Betula pendula cv Roth) leading to increased freezing tolerance, and thus leaves can be used as an expe
American Society of Plant Biologists.