Recently, I have had some field trials on resistance screening of different tomato genotypes against RKN. I had observed that a few genotypes have a blossom end rot on many of its fruit. Does anyone know the possible causes of blossom end rot on tomatoes fruit? I appreciate in advance for sharing me your ideas!
regards,
Blossom End Rot (BER) is observed in various fruit vegetables such as tomato, bell pepper, watermelon, and eggplant. Although BER is a well-known physiological disorder of tomato fruit induced by calcium deficiency, it may occur despite a sufficient Ca content in the fruit because BER is related to Ca movement determined by xylem vessels in the fruit.
BER is induced by insufficient Ca in the distal portion of the fruit tissue and occurs within 2 weeks after anthesis when fruit cell expansion is most rapid. Therefore, the incidence of BER is affected by daily irradiance and temperature, which affect fruit cell expansion as well as Ca supply. Studies using transgenic tomato indicated that BER could be triggered by a low concentration of apoplastic Ca 2+ , which stabilizes the plasma membrane.
For more information, please refer the attached book on page 117:
I agree with moisture stress diminishing calcium transport to distal point in fruit, besides obviously calcium deficiency, this is amplified in days with high radiance; addicional we saw blosssom end root when imbalance of nutrients occurs, more specific with excessive potasium in soil fertilisation.
It have a different behavior depending on botanical variety or comercial
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