| 释义 |
pycnium Bot.|ˈpɪknɪəm|
Pl. pycnia.
[mod.L., f. Gr. πυκνός thick.]
In rust fungi of the order Uredinales, a fruit-body resembling a pycnidium. So ˈpycnial a., of or pertaining to a pycnium; ˈpycniospore, a spore from a pycnium.
1905J. C. Arthur in Bot. Gaz. XXXIX. 221 For the sorus of the initial stage [of uredineal fungi], usually..called spermogonium, pycnidium, etc., I propose pycnium..; derivatives pycnial, pycniospores, etc. 1926Mycologia XVIII. 90 The inefficient sori (pycnia) are present or absent in both macrocyclic and microcyclic rusts. 1929J. C. Arthur et al. Plant Rusts i. 6 The pycnia produce pycniospores. 1937Pycnial [see æcium]. 1937Nature 8 May 800/2 Pycniospores..were present in the nectar. 1946K. S. Chester Nature & Prevention of Cereal Rusts v. 49 The pycnia occur on both leaf surfaces. 1976G. C. Ainsworth Introd. Hist. Mycol. v. 132 Isolated monosporidial infections gave rise to pycnia which produced pycniospores and nectar but no aecia developed as they frequently did when two or more pycnial pustules were adjacent to one another. |