Biomedical Engineering Reference
In-Depth Information
dahliae, V. lateritium, Fusarium solani, F. oxysporum, F. gibbosum, Paecilomyces varioti
,
Xanthamonas
sp.
, Erwinia sp., Pseudomonas sp.
At the same time test plots were inhabited
by fungi-antagonists of
V. dahliae
(
Acremonium, Trichoderma, Stachybotris, Aspergillus,
Gliocladium, Penicillium
)
.
Figure 4. Lysis of
V. dahliae
microsclerotia under action of Verbactin.
Strains possessing growth promoting activity were determined among bacteria,
streptomycetes and fungi. These cultures were capable to synthesize phytohormones
(indoleacetic and gibberellic acids).
Increased development of phytopathogens in cotton root system suppressed growth and
development of cotton and its productivity as well. Thus, healthy plant was 60 cm tall and
produced 20 cotton balls, whereas infected plant was 45 cm tall with 16 balls, in average.
According to available data [3], microsclerotia of
V. dahliae
are the main form of its
adaptation to preserve, distribute and propagate. That is why study of ability of Verbactin to
destroy the infection source in soil - microsclerotia - was conducted.
Lysis of microsclerotia of
V. dahliae
57 under action of Verbactin was observed at
microscope on the same spot (figure 4). The clear gradual lysis of mycelium with
microsclerotia was revealed.
Search WWH ::
Custom Search