7 research outputs found
The mycobiota of herbal drug plants in Oman and possible decontamination by gamma radiation
The mycobiota of seven herbal plant species were surveyed: Nigella sativa, Zataria multiflora, Trigonella
foenum-graecum, Rhazya stricta (seeds and leaves), Haplophyllum tuberculatum, Aristolochia bracteolata and Teucrium
muscatense. A total of 24 species of fungi were isolated from the plants (seeds, leaves, flowers and/or stems). No
significant differences were found between the mycobiota of the herbal plant species or between the six samples of
each plant. Aspergillus niger and Penicillium sp. were the most common species, followed by A. flavus and Rhizopus
spp. A. flavus was found in all herbal plants except R. stricta (leaves) and Z. multiflora. Aflatoxins were extracted
from a number of herbal plants. Some strains of A. flavus isolated from the plants were aflatoxigenic. Gamma radiation
at 905.4 Gy showed an average percent inhibition of fungi on some herbal plants between 88.6 and 99.1%.
Complete inhibition was obtained at 1836 Gy
Diversity and Trapping Efficiency of Nematophagous Fungi from Oman
A survey of the nematophagous mycobiota biodiversity of 82 soil and leaf-litter samples in the Sultanate
of Oman yielded ten species of nematode trapping fungi belonging to three genera. The species are: Arthrobotrys
eudermata, A. thaumasia, A. musiformis, A. oligospora, A. oligospora var. oligospora, A. oudemansii, A. multiformis,
A. javanica, Drechslerella brochopaga and Gamsylella geophyropaga. This is the first record of these species in Oman.
Arthobotrys multiformis represents the second record of this species worldwide. A systematic study showed that A.
oudemansii, A. multiformis and A. javanica were morphologically more variable than was so far known. In four days,
A. oligospora, A. thaumasia, D. brochopaga and A. eudermata trapped all nematodes added to the Petri dishes
(Panagrellus redivivus, 100 specimens per dish). No significant differences were found in the trapping efficiency
among the species tested