Role of phytochrome B in organ formation processes in Cucumis sativus L

The role of phytochrome B in the organogenesis process in the apical and axillary shoot meristems during early ontogenesis stages in cucumber Cucumis sativus L. at photoperiods (day/night) 10/14, 16/8 h, and continuous light in comparison with wild type plants and phytochrome B-deficient mutant (lh-...

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Bibliographic Details
Published in:Russian journal of developmental biology 2013-05, Vol.44 (3), p.135-138
Main Authors: Sysoeva, M. I, Markovskaya, E. F
Format: Article
Language:English
Subjects:
Animal Anatomy
Biomedical and Life Sciences
buds
chromatin
cucumbers
Cucumis sativus
Developmental Biology
flowers
Histology
leaves
Life Sciences
lighting
Morphology
mutants
ontogenesis
ontogeny
organogenesis
photoperiod
phytochrome
Plant Developmental Biology
shoot meristems
temperature
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Summary:The role of phytochrome B in the organogenesis process in the apical and axillary shoot meristems during early ontogenesis stages in cucumber Cucumis sativus L. at photoperiods (day/night) 10/14, 16/8 h, and continuous light in comparison with wild type plants and phytochrome B-deficient mutant (lh-mutant) was investigated. In mutant phytochrome B, deficiency caused inhibition of initiation of leaves both in the main shoot and lateral shoots and increased the number of flower buds (IV stage of organogenesis). With continuous light, the number of lateral shoots and flowers during stage IV of organogenesis in wild-type plants increased twofold in comparison with the mutant. Short-term temperature drops did not induce floral ontogenesis in mutants but increased the number of off-shoots in both experimental variants during a long photoperiod and continuous lighting. We propose that phytochrome B, by increasing the compactness of chromatin, may facilitate coordination of ontogenesis processes with changing environmental conditions.
ISSN:1062-3604
1608-3326
DOI:10.1134/S1062360413030089