were considered germinated if the germ tube was equal to or greater than the minor diameter of the parent 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
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.
Survival of dispersed urediniospores
of Tranzschelia discolor Fckl.
were scraped from the leaves of naturally infected soybean plants growing in the fields of the university campus.