Compatible solutes determine the heat resistance of conidia

Table 1 Heat resistance in D-values of Aspergillus niger conidia

Strain	Age	Temperature	D₅₄ value ± SD (minutes)	D₅₇ value ± SD (minutes)
wild type (N402)	8d	28 °C	41.4 ± 7.3^a
wild type (N402)	72 h	28 °C	36.8 ± 13.9^abcd
wild type (N402)	64 h	28 °C	30.8 ± 7.2^ab
wild type (N402)	48 h	28 °C	19.3 ± 0.3^b
wild type (N402)	43 h	28 °C	6.5 ± 0.5^c
wild type (N402)	39 h	28 °C	5.6 ± 2.1^cd
wild type (N402)	8d	28 °C		6.5 ± 1.9^f
wild type (N402)	8d	32 °C		9.7 ± 0.5^f
wild type (N402)	8d	37 °C		17.0 ± 0.4^g
MA234.1	8d	28 °C	52.3 ± 25.8^abcde
∆tpsABC	8d	28 °C	22.1 ± 7.7^bce
∆mpdA, ∆tpsABC	8d	28 °C	3.3 ± 1.0^d
∆mtdB, ∆tpsABC	8d	28 °C	21.9 ± 4.2^b
∆mpdA, ∆mtdB, ∆tpsABC	8d	28 °C	22.4 ± 3.5^b

^{a,b,c,d,e,f,g} D-values with different superscript letters within the same column are significantly different from each other (p < 0.05). Significant differences were calculated using a Student’s T-test. D-values are listed in minutes: average ± the standard deviation. The D-values were based on a log-linear model, calculated from heat inactivation curves shown in Fig. 2f, Fig. 4c and Fig. 5c

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