Previous investigations have shown that the enzymes
catalyzing the biosynthesis of the gibberellin-type of hormones
from mevalonic acid in plants are compartmentalized
in plastids. Moreover, the activity of one of the key
enzymes in the biosynthetic sequence, kaurene synthetase,
exhibits markedly enhanced activity when a dark-grown pea
seedling undergoes de-etiolation...
The teliospore of Tilletia caries germinates to produce a promycelium
with a whorl of primary sporidia at its tip. The time between
emergence of the promycelium and the development of primary sporidia
averaged 2.3 h. Fusion between compatible sporidia occurred within
an additional 3.8 h. Primary sporidia appeared to be...
The ectomycorrhizal fungi Cenococcum geophilum, Hebeloma
crustuliniforme and Laccaria laccata produced ethylene in vitro in
modified Melin-Norkrans liquid medium only if amended with 2.5 to
10 mM methionine; Pisolithus tinctorius failed to produce ethylene
unless the cultures were renewed with fresh methionine-amended
medium prior to ethylene assay. An additional 19...
A taxonomic revision of the genus Anthracobia Boudier is
presented. The genus and eight included taxa are described and
figured. A discussion of the taxonomic criteria used to delimit the
genus and the species is included, and a key to the recognized taxa is
given. Four imperfect states for included...
Ethylene was produced by Cylindrocladium floridanum and C. scoparium in culture. Production was methionine dependent and maximal during the active growth phase of the fungus, beginning shortly after spore germination. More ethylene was produced sooner by C. floridanum than C. scoparium. Ethylene was produced by Cylindrocladium both from active mycelium...
Three provisional species are described as new: Leucogaster
couchii, L. gelatinosus, and L. microsporus. Leucophlebs candida
is transferred to Leucogastef, completing the transfer of all
Leucophlebs species to Leucogaster. L. columellatus is transferred
to Sclerogaster. L. longisterigmatus is synonymized with
L. rubescens, L. foveolatus with L. odoratus, and L. fulvimaculatus...
Sediment samples were collected from eight sampling sites
along the Yaquina Estuary, Oregon from Yaquina Bay to Elk City near
the head of the estuary. Samples were collected in November 1973,
February 1974, May 1974 and August 1974 from two or three intertidal
levels depending on the magnitude of the...
Leaves of Phaseolus vulgaris cv. 'Dark Red Kidney' and cv. 'Red
Mexican U. I. 31', Phaseolus lunatus cv. 'Fordhook Bush 242', Phaseolus
mungo cv. 'Berken', and Glycine max cv. 'Wilkin' have been shown to
contain a factor which consistently agglutinated the saprophyte
Pseudomonas putida; another saprophyte Pseudomonas fluorescens was
agglutinated...