Table 3.

Antagonistic activity of fluorescent pseudomonads against fungi of the genus Alternaria.

	Indicators
Pseudomonas	Aa			At				Ai
Isolates (species group)∗	CABI1	AaGH32	AaGSt37	CABI1	AtSt09	AtH50	At220	CBS2	AiSt01	AiH53
P. protegens CHA0	++	++	+++	++	++	++	++	+++	++	+++
P. libanensis 9 (Ia)#	+++	+++	+++	++	++	+++	++	++	++	++
P. antarctica 98 (I)	+	++	++	+	-	+	-	+	+	+
P. rhodesiae 188 (I)	+++	+++	+++	+++	+++	+++	++	+++	+++	+++
P. sp. 262 (I)	++	++	++	++	++	++	+	++	+++	+++
P. sp. 279 (I)	++	++	++	+	++	+	+	++	++	++
P. sp. 282 (I)	++	++	++	++	++	++	+	++	++	++
P. sp. 339 (II)	+++	+++	+++	++	++	++	++	++	++	+++
P. sp. 342 (II)	++	++	++	-	++	-	+++	-	-	++
P. sp. 346 (II)	++	+++	+++	++	++	++	++	++	++	++
P. sp. 409 (I)	++	++	+++	++	+++	++	++	++	++	+++
P. sp. 413 (I)	++	++	++	++	+	+	++	++	++	++
P. sp. 418 (I)	++	++	++	++	++	++	++	++	++	++
P. sp. 423 (I)	++	++	++	++	++	++	++	++	++	++
P. sp. 429 (I)	-	-	++	+	++	+	-	+	+	-
P. sp. 491 (I)	++	++	++	++	++	++	++	+++	++	+++
P. sp. 500 (I)	++	++	++	+	+++	++	++	+++	+++	++
P. sp. 516 (III)	++	++	++	-	++	+	+	++	+	++
P. sp. 523 (III)	++	++	++	+	++	+	+	+	+	++
P. sp. 538 (III)	+	+	+++	-	++	+	++	+	-	++

Aa, Alternaria alternata; At, A. tenuissima; Ai, A. infectoria. - none, + low, ++ moderate, +++ strong growth inhibition. ^∗Determined by MALDI-TOF MS; similarity scores within a strain group are higher than 2.3, which are considered to be highly probable species identification. ^#Reference strain of former studies displayed a score value with strains of group I in the range between 2.0 and 2.2, which is considered to be probable species identification and therefore, it is defined as a subgroup a of group I. ¹Reference strain from the Centre for Agriculture and Biosciences International in Wallingford, United Kingdom (strain no. CABI 353822 for A. alternata and CABI 352931 for A. tenuissima). ²Reference strain from the CBS-KNAW collection of the Westerdijk Fungal Biodiversity Institute in Utrecht, Netherlands (strain no. CBS 120149 for A. infectoria).