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Abstract

Small scale, artificial freezing studies showed that injury was more severe on detached than on attached fruits of ‘Red Spy’, ‘Delicious’, and ‘Idared’ apples.

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Abstract

Asparagus aphid [Brachycorynella asparagi (Mordvilko)] feeding without freezing reduced vigor of asparagus (Asparagus officinalis L.), as measured by crown size, fern growth, root necrosis, and bud number, but did not greatly reduce short-term survival. Freezing dormant crowns for 24 hr at −4.5C killed some crowns and reduced vigor of survivors. Aphid feeding and freezing were synergistic; they reduced survival and vigor of survivors to a much greater extent than either aphid feeding or freezing alone. Aphid feeding resulted in early budbreak and precocious growth. A method for counting aphids per plant was developed.

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efficiency of heat dissipation, which is an essential mechanism in protecting the leaf from light-induced damage ( Horton et al., 1996 ). Because temperatures of –4 and –5 °C caused freezing injury ( Table 1 ), it may be hypothesized that the decrease in NPQ

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(1978) showed that frost tolerance of floral buds is inversely related to the stage of bud development. As flower development increases, buds and flowers become less tolerant to freezing damage. Hancock et al. (1987) reported an association between

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Freezing temperatures are one of the major constraints for palm cultivation in temperate regions. Severe cold damage can destroy plant tissues and may severely reduce water conduction in the stem ( Larcher and Winter, 1981 ; Meerow, 2005 ). When

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releases dormancy and loses freezing tolerance earlier than JG and is more susceptible to frost damage from spring freeze-thaw cycles. The identification of three asparagus cultivars, GM, JG, and UC, with varying levels of adaptation to the cold climate of

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of senescence-associated mRNAs during leaf senescence induced by different senescence-inducing factors in Arabidopsis Plant Mol. Biol. 37 445 454 Pearce, R. 2001 Plant freezing and damage Ann. Bot. (Lond.) 87 417 424 Peppi, M.C. Fidelibus, M

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limited by its relatively weak winter hardiness compared with some other C 4 turfgrass species, such as bafflograss, and freezing injury in many regions. Freezing temperature may cause damage by forming ice crystals, which result in rupture of cell

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damage and yield losses when the most vulnerable tissue, floral buds, deacclimate (loss of cold hardiness). Peach plants deacclimate and become susceptible to freezing temperatures at the end of February, but spring freeze risk remains until late March

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Enhanced cold tolerance, including tolerance to winter freezing and spring frosts, is needed for genetic improvement of current highbush blueberry cultivars ( Moore, 1993 ). Freezing and cold injury not only cause direct crop loss through flower

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