Table 1.

Mannitol accumulation in fungal cultures grown with and without host-leaf extract

Mannitol production	Accumulation, mg/gfw mycelia
	Alternaria alternata		Cercospora nicotianae
	−L. E.	+L. E.	−L. E.	+L. E.
Internal	5.89  ± 0.08*	7.78  ± 1.1	3.39  ± 0.39	3.97  ± 1.17
Secreted	2.64  ± 0.31	9.45  ± 1.38	ND	ND

^*Means of data from two independent experiments ±SE; ND, not detected; L. E., tobacco-leaf extract.