Boron modulation of chilling and freezing tolerance in leaf cells of warm season species
Huang, L., Bell, R.W. and Dell, B. (2007) Boron modulation of chilling and freezing tolerance in leaf cells of warm season species. In: Xu, F., Goldbach, H.E., Brown, P.H., Bell, R.W., Fujiwara, T., Hunt, C.D., Goldberg, S. and Shi, L., (eds.) Advances in Plant and Animal Boron Nutrition. Springer, Dordrecht, The Netherlands, pp. 31-46.
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Historical accounts of possible B roles in the protection of tree and horticulture species against frost damage were reported as early as 1950s, with more field observations and experimental evidence since then. Although the initial reports (Anon 1958: Beltram 1958) were no more than anecdotal evidence due to the lack of proper comparative control experiments, later field and glasshouse studies have provided more reliable evidence about the involvement of B in the protection against frost damage — decreased frost-induced shoot-tip dieback or increased flowering and fruit yield, for example: in subtropical eucalypts Eucalyptus grandis (Cooling 1967: Cooling and Jones 1970) and Eucalyptus grandis x Eucalyptus urophylla (Lu and Huang 2003): apple, pear and blueberry (Blevins et al. 1996: Hanson and Breen 1985; Milovankic et al. 1990) and in birch, Scots pine, and Norway spruce (Braekke 1983). Frost-induced “white top” (bleached young leaves) has been observed in low temperature-sensitive E. urophvila and E. grandis in south China (Xu Daping. pers. comm.) where B deficient soils arc common (Dell and Malajczuk 1994). Field observations have also suggested a link between low canopy temperature and enhanced leaf tissue damage (bleached patches) in oilseed rape grown in low B soil in south-east China (Ye et al. 1997).
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