Role of phytochrome B in the development of cold tolerance in cucumber plants under light and in darkness |
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Authors: | M I Sysoeva E F Markovskaya E G Sherudilo |
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Institution: | 16465. Institute of Biology, Karelian Branch, Russian Academy of Sciences, Pushkinskaya ul. 11, Petrozavodsk, Karelia, 185910, Russia 26465. Petrozavodsk State University, Petrozavodsk, Karelia, Russia
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Abstract: | Cold tolerance of cucumber (Cucumis sativus L.) seedlings was investigated using wild-type plants and the phytochrome B-deficient mutant (lh-mutant). Plants were subjected for 6 days to intermittent short-term cooling (12°C for 2 h per day) and to continuous chilling under conditions of 16-h photoperiod (day/night = 16/8 h) and permanent illumination. “Dehardening” process was initiated by the transfer of plants to either light or dark conditions at 23°C. It was concluded that phytochrome B participates in the development of cold tolerance in cucumber plants under stress conditions, i.e., under short-term intermittent chilling at nights and during dehardening in continuous darkness. |
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