We investigated the effect of soil solarization on seed and root exudates of tomato plants and the role of these exudates in the establishment of fluorescent pseudomonads in soil. Seed and root exudates of tomato grown in solarized soil contained lower amounts of sugars and higher amounts of amino acids and amino compounds and were less favorable for growth of bacteria and fungi in culture compared with seed and root exudates of tomato grown in nonsolarized soil. Addition of exudates from germinating seeds into solarized soil, however, increased populations of fluorescent pseudomonads and decreased populations of fungi compared with nonsolarized soil (...)
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Abraham Gamliel (1992) studied this question.