TY - EJOU
AU - XY, He
AU - Ye, H
AU - Ma, JL
AU - Zhang, RQ
AU - Chen, GC
AU - Xia, YY
TI - Semi-lethal high temperature and heat tolerance of eight Camellia species
T2 - Phyton-International Journal of Experimental Botany
PY - 2012
VL - 81
IS - all
SN - 1851-5657
AB - Annual leaf segments of eight Camellia species were used to study the heat tolerance by an electrical conductivity method, in combination with a Logistic equation to ascertain the semi-lethal high temperature by fitting the cell injury rate curve. The relationship between the processing temperature and the cell injury rate in Camellia showed a typical "S" shaped curve, following the Logistic model. The correlation coefficient was above 0.95. The semi-lethal high temperature LT50 of the eight Camellia species, determined by the inflection point on the curve, varied from 50 to 57 LT50 / °C, following the descending order: Camellia oleifera > C. japonica > C. polyodonta > C. semiserrata > C. nitidissima > C. gigantocarpa > C. nanyongensis > C. vietnamensis. The semi-lethal high temperature of C. oleifera was 56.8 °C, and that of C. vietnamensis was 50.6 °C. Results showed C. oleifera appeared as the best suitable species for introduction in high-heat zones. Camellia vietnamensis appeared more suitable for planting in temperate regions at lower temperatures. These results can provide theoretical basis for breeding and introduction of heat-tolerant oil-tea cultivars.
KW - Camellia
KW - Logistic equation
KW - Semi-lethal high temperatures
KW - Heat tolerance
DO - 10.32604/phyton.2012.81.177