uredinium

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uredinium

(yo͝or′ĭ-dĭn′ē-əm) also

uredium

(yo͝o-rē′dē-əm)
n. pl. ure·dinia (-dĭn′ē-ə) also ure·dia (-dē-ə)
A reddish pustulelike structure that is formed in the tissue of a plant infected by a rust fungus and produces urediniospores.
References in periodicals archive ?
UREDINIA mostly on leaves, sometimes on petioles and stems, amphiphylous, chiefly hypophylous, yellowish or pale yellowish brown, scattered or combined in groups, naked, round, about 1-2 cm in diam.
scitula is a teleomorph name, only uredinia were described; no telia were found on the type or other specimens examined of H.
Uredinia amphigena, cinnamomea, pulverulenta, epidermide fissa cinctis, 0,5-1,0 mm, aggregata aut sparsa; urediniosporis 25-35 x 17,5-25 [micron]m, ovatis, elipsoideis, raro triangularis, poris germinationis 2-4 aequatorilibus aut subaequatorialibus; episporio 1,5-3,5 [micron]m, dilute brunneis, echinulato.
For each leaf on which uredinia and urediniospore production were to be determined, leaf length and width (each in centimeters) were measured the day of inoculation.
Uredinia amphigenous, scattered, cinnamon brown, covered by ruptured epidermis, naked, 0.
Large uredinia more than 800 [micro]m in diameter were found on the unifoliolate leaves of all plants of Nebr.
KS00WGRC44 had a lower infection type of 1 (flecks with small necrotic uredinia) when inoculated with leaf rust race PNM-10,18 at the seedling stage than that observed on the lines TA 4186 (Lr39; IT = 4) and KS90WGRC10 (Lr41; IT = 3C, moderate size uredinia with chlorosis).
Compared with Thatcher, which was rated at 90 S (large uredinia), the Thatcher lines with Lr2a, Lr9, and Lr26 had leaf rust ratings of 20 M, 10 MR (moderate size uredinia with necrosis), and 30 MR, respectively, in plots at Kinston (Table 1).
Scores were by pustule type on a 0 to 4 scale as follows: 0 = no uredinia or visible symptoms, 1 = small uredinia with necrotic edge, 2 = small to medium uredinia with limited urediospore production, 3 = medium-sized uredinia with moderate sporulation, 4 = large, ragged uredinia with abundant sporulation.
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).
Disease reactions of segregating progeny were classified as either a hypersensitive fleck with no sporulation (IT = ;) or susceptible with medium to large uredinia (IT = 3-4).