. Experiments with plants. Botany. 224. Summer spores, or uredo- spores (I'ed nist stage), of the Black Stem Rust of Wheat. Autumn spores, or teleuto- spores (black rust stage), of the Black Stem Rust of Wheat. (uredospores) earlier, the other (teleutospores), later in the season. The uredospores germinate during the summer; they send out germ-tubes which enter the stomata of the leaf (Fig. 226). The teleutospores rest â â during the winter; in the spring they germinate, producing conidia (Fig. 227, c),which are borne by the wind to the leaves of the Barberry plant; here they germinate, penetr
. Experiments with plants. Botany. 224. Summer spores, or uredo- spores (I'ed nist stage), of the Black Stem Rust of Wheat. Autumn spores, or teleuto- spores (black rust stage), of the Black Stem Rust of Wheat. (uredospores) earlier, the other (teleutospores), later in the season. The uredospores germinate during the summer; they send out germ-tubes which enter the stomata of the leaf (Fig. 226). The teleutospores rest â â during the winter; in the spring they germinate, producing conidia (Fig. 227, c),which are borne by the wind to the leaves of the Barberry plant; here they germinate, penetrat- â J6 Summer sporei of tlio Black stem Rust 4â⢠â lonf li\' nf of Wheat. ucrmiuatiiiK "II a Wheat leaf lUg TiUe l(\lt l)\ meaUSOt anil spiiiUng the germ tubes tlirough the , , ^ p stomata. a germ-tuue and lorming. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Osterhout, Winthrop John Van Leuven, 1871-. New York, The Macmillan company; London, Macmillan & co. , ltd.
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