scholarly journals Low-temperature Tolerance in Vaccinium Angustifolium L.: Variation within Two Wild-managed Populations

HortScience ◽  
1995 ◽  
Vol 30 (4) ◽  
pp. 848A-848
Author(s):  
Paul E. Cappiello
Keyword(s):  
Low Temperature ◽  
Clonal Selection ◽  
Temperature Tolerance ◽  
Vaccinium Angustifolium ◽  
Commercial Use ◽  
Low Temperature Tolerance ◽  
Leaf Drop ◽  
Selection For

During the winters of 1993–94 and 1994–95, 54 clones of Vaccinium angustifolium were evaluated for low-temperature tolerance of inflorescence buds. During both seasons, clones were tested periodically, starting right after leaf drop, continuing through mid-winter, and finally through spring loss of low-temperature tolerance. Plants showed greatest variation in lowest survival temperature (LST) during fall and spring sampling dates, and the least variation on the mid-winter dates. In the 1993–94 study, clonal LSTs for November buds ranged from –5 to –27C; January buds showed LST variation of 6C. April buds showed a similar trend to that observed in late November. LST variation is discussed relative to clonal selection for ornamental and commercial use.

scholarly journals Seasonal Variation in Low-temperature Tolerance of Vaccinium angustifolium Ait.

HortScience ◽  
1994 ◽  
Vol 29 (4) ◽  
pp. 302-304 ◽  
Author(s):  
Paul E. Cappiello ◽  
Scott W. Dunham
Keyword(s):  
Seasonal Variation ◽  
Low Temperature ◽  
Temperature Tolerance ◽  
Stem Tissue ◽  
Economic Aspects ◽  
Vaccinium Angustifolium ◽  
Flower Primordia ◽  
Ambient Temperatures ◽  
Low Temperature Tolerance ◽  
Floral Bud

Seven Vaccinium angustifolium clones were tested for low-temperature tolerance over two dormant seasons. Flower primordia in the pseudoapical bud were damaged at higher temperatures than were stem tissue and primordia of the fourth floral bud. The flower primordia located at the stem tip also reacclimated earlier and seemed to show a stronger response to abrupt spring warming than did other tissues tested. Given the lowest survival temperatures determined and the ambient temperatures recorded, we recommend that the physiological and economic aspects of cryoprotectants and flower-delaying treatments be studied further.

HAPLOID SELECTION FOR LOW TEMPERATURE TOLERANCE OF TOMATO POLLEN

Genetics ◽  
1982 ◽  
Vol 101 (1) ◽  
pp. 129-137 ◽  
Author(s):  
Daniel Zamir ◽  
Steven D Tanksley ◽  
Richard A Jones
Keyword(s):  
Low Temperature ◽  
Low Temperatures ◽  
Pollen Grains ◽  
Temperature Tolerance ◽  
F1 Hybrid ◽  
Peruvian Andes ◽  
Low Temperature Tolerance ◽  
Selection For ◽  
Chromosome Segments ◽  
Haploid Selection

ABSTRACT Pollen grains were harvested from an interspecific F1 hybrid between the cultivated tomato, Lycopersicon esculentum Mill., and its wild relative Lycopersicon hirsutum Humb. & Bonpl., a low temperature tolerant accession originating from an altitude of 3200 m in the Peruvian Andes. The two species differ for electrophoretically-detectable loci that mark six (possibly seven) of the 12 tomato chromosomes. Isozyme analysis of the BC1 populations derived from controlled pollinations at normal and low temperatures indicates a significant skewing of allelic frequencies favoring two independent chromosome segments of L. hirsutum at low temperatures. The results demonstrate that gametophytic selection for low temperature tolerance of tomato pollen is determined, at least in part, by genes expressed in the haploid pollen.

scholarly journals SEASONAL VARIATION IN LOW-TEMPERATURE TOLERANCE OF FRUIT-BUDS OF VACCINIUM ANGUSTIFOLIUM.

HortScience ◽  
1992 ◽  
Vol 27 (6) ◽  
pp. 612d-612
Author(s):  
Paul E. Cappiello
Keyword(s):  
Seasonal Variation ◽  
Low Temperature ◽  
New England ◽  
Vascular Tissue ◽  
Temperature Tolerance ◽  
Vaccinium Angustifolium ◽  
Flower Primordia ◽  
Factors Affecting ◽  
Low Temperature Tolerance ◽  
Temperature Damage

Lowbush blueberry (Vaccinium angustifolium) is a major fruit crop in costal, Northern New England and Atlantic Canada. One of the factors affecting production is low temperature damage of flower primordia. In addition to mid-winter damage, much of the damage occurs in spring due to late frosts. A study was designed to examine the seasonal variation in the LT50 of fruit buds and to determine the location of the tissue damage. Field-collected stems were exposed to controlled temperature drops and examined for damage. Three types of damage were identified; destruction of flower primordia, browning of vascular tissue within the fruit-bud, and browning of stem tissue at the base of the bud. The seasonal variation of the occurrence of this damage will be discussed.

scholarly journals Low temperature tolerance of human embryonic stem cells

2006 ◽  
pp. 124-129 ◽  
Author(s):  
Boon Chin Heng ◽  
Kumar Jayaseelan Vinoth ◽  
Hua Liu ◽  
Manoor Prakash Hande ◽  
Tong Cao
Keyword(s):  
Stem Cells ◽  
Embryonic Stem Cells ◽  
Low Temperature ◽  
Human Embryonic Stem Cells ◽  
Embryonic Stem ◽  
Temperature Tolerance ◽  
Low Temperature Tolerance
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