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 (yo͝or′ĭ-dĭn′ē-ə-spôr′) also u·re·do·spore (yo͝o-rē′də-)
A dikaryotic often reddish spore of most rust fungi. Urediniospores disperse widely, spreading infection within a host plant and to other plants.

References in periodicals archive ?
Individual urediniospores were considered germinated if the germ tube was equal to or greater than the minor diameter of the parent urediniospore.
Urediniospore and teliospore morphology were consistent with that described for Puccinia emaculata Schw.
Thus, the model permits density-independent measurement of the competitive effects of strains on one another's uredinial formation and urediniospore production.
6: Scanning electron micrographs of Puccinia sibirica (A) Urediniospore showing echinulate ornamentation (B) Teliospores showing verrucose ornamentation
Seedlings were screened in the same greenhouse test through two inoculations with stem rust urediniospores using the conditions, urediniospore concentrations, and procedures of Welty and Barker (1993).
Pustule type (PT) was visually determined by means of a scale from 0 to 4 where 0 = no uredinia, 1 = chlorotic flecks, 2 = small uredinia surrounded by necrosis with limited urediniospore production, 3 = medium size uredinia with moderate sporulation, and 4 = large uredinia and abundant sporulation (Welty and Barker, 1993).
For field inoculations, urediniospore suspensions (approximately [10.
Components of resistance in barley to stem rust: receptivity, urediniospore production, latent period, and infection response in adult plants.
When the first leaves were fully expanded, the wheat plants were inoculated using a "sweep-dusting" method, sweeping the fully infected leaves of the check Mingxian 169 above the test wheat plants and dusting urediniospores on them with a very uniform deposit.
UREDINIOSPORES globose to sub-globose, obovoid or ellipsoid or elongated ellipsoid, hyaline to light brown, 20-32.