TY - JOUR
T1 - Incidence of blossom-end rot in relation to the water-soluble calcium concentration in tomato fruits as affected by calcium nutrition and cropping season
AU - Yoshida, Yuichi
AU - Irie, Nobuyuki
AU - Vinh, Tran Duy
AU - Ooyama, Mitsuo
AU - Tanaka, Yoshiyuki
AU - Yasuba, Ken Ichiro
AU - Goto, Tanjuro
N1 - Publisher Copyright:
© 2014 The Japanese Society for Horticultural Science (JSHS), All rights reserved.
PY - 2014
Y1 - 2014
N2 - To understand the factors affecting the incidence of blossom-end rot (BER), the effect of the Ca/K ratio (4/12-12/4, in me·L-1) in nutrient solutions and Ca concentration in fractions in the distal part of young tomato fruits immediately before BER symptoms appear were investigated for three seasons. The rate of BER incidence increased with a decrease in the Ca/K ratio in the supplied solutions in the summer and spring, but little difference was observed in the winter. Ca concentration was highest in winter and lowest in summer, and the concentration in fractions decreased with a decrease in the Ca/K ratio of the solutions. When the results of all three experiments were pooled, among the fractions, water-soluble Ca concentration was found to have the highest significance in the relationship to BER incidence. The risk of BER incidence in rapidly growing tomato increased to a critical level when water-soluble Ca in the distal part of the fresh fruit decreased to less than 0.20 µmol00B7g-1 FW. Multiple-regression analysis revealed that the concentration of water-soluble Ca, which is predominantly recovering apoplastic or cytoplasmic Ca2+, and total Ca, which has been translocated during fruit development, are significantly affected by solar radiation and Ca concentration in the supplied solution rather than air temperature.
AB - To understand the factors affecting the incidence of blossom-end rot (BER), the effect of the Ca/K ratio (4/12-12/4, in me·L-1) in nutrient solutions and Ca concentration in fractions in the distal part of young tomato fruits immediately before BER symptoms appear were investigated for three seasons. The rate of BER incidence increased with a decrease in the Ca/K ratio in the supplied solutions in the summer and spring, but little difference was observed in the winter. Ca concentration was highest in winter and lowest in summer, and the concentration in fractions decreased with a decrease in the Ca/K ratio of the solutions. When the results of all three experiments were pooled, among the fractions, water-soluble Ca concentration was found to have the highest significance in the relationship to BER incidence. The risk of BER incidence in rapidly growing tomato increased to a critical level when water-soluble Ca in the distal part of the fresh fruit decreased to less than 0.20 µmol00B7g-1 FW. Multiple-regression analysis revealed that the concentration of water-soluble Ca, which is predominantly recovering apoplastic or cytoplasmic Ca2+, and total Ca, which has been translocated during fruit development, are significantly affected by solar radiation and Ca concentration in the supplied solution rather than air temperature.
KW - Seasonal changes
KW - Solanum lycopersicum L
KW - Solar radiation
KW - Temperature
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U2 - 10.2503/jjshs1.CH-107
DO - 10.2503/jjshs1.CH-107
M3 - Article
AN - SCOPUS:84908150979
VL - 83
SP - 282
EP - 289
JO - Horticulture Journal
JF - Horticulture Journal
SN - 2189-0102
IS - 4
ER -