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Phytochrome-mediated changes in the membrane potential of subepidermal cells ofLemna paucicostata6746

✍ Scribed by H. Löppert; W. Kronberger; R. Kandeler

Publisher
Springer-Verlag
Year
1978
Tongue
English
Weight
318 KB
Volume
138
Category
Article
ISSN
0032-0935

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✦ Synopsis

Light-stimulated transmembrane potential changes have been measured continuously after implantation of microelectrodes into subepidermal cells of the short-day plant Lemna paucicostata 6746~ Irradiation for 5 rain with white or red light caused a transient hyperpolarization. These potential changes could be suppressed with 10-6 M DCMU. Irradiation of DCMU-inhibited plants with far-red light for 5 rain hyperpolarized the membrane potential, which thereafter was not changed by further far-red application. Consecutive red light irradiation for 5 min depolarized the membrane potential. The red/far-red reversibility of the potential changes (which could be repeated several times with a single plant) suggests the participation of phytochrome.

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