Agriculture Reference
In-Depth Information
Fig. 24.8.
The Hodgkin-Huxley (
HH
)equivalentcircuitforanaxon(
a
)andthemodified
HH circuit for sieve tubes in phloem (
b
)
a
b
c
d
f
h
e
g
Fig. 24.9.
Soybean plant after irradiation at 450 nm in direction B. The light intensity was
8.5 µE
/
m
2
s. Photographs were taken 10 s (
a
), 10 min (
b
), 20 min (
c
), 30 min (
d
), 40 min (
e
),
50 min (
f
), 60 min (
g
), and 70 min (
h
) after beginning of the irradiation. Soil around the soy-
bean was treated with tetraethylammonium chloride 24 h before the photographs were taken
The duration of the action potential is not influenced by the location
of the working electrode in the stem or leaves of the plant, or on the
distance between the working and reference electrodes. Solitary waves, due
to impulses generated by changes in environmental conditions, function as
carriers of information in soybeans.
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