Light intensity and temperature regulate petiole elongation by controlling the content of and sensitivity to gibberellin in Cyclamen persicum

Title
Light intensity and temperature regulate petiole elongation by controlling the content of and sensitivity to gibberellin in Cyclamen persicum
Author(s)
오욱김기선[김기선]
Keywords
LOW IRRADIANCE; SHOOT GROWTH; DWARF WHEAT; LEAF; PHOTOPERIOD; GENOTYPES; QUALITY; STEM; PEA; RESPONSIVENESS
Issue Date
201406
Publisher
KOREAN SOC HORTICULTURAL SCIENCE
Citation
HORTICULTURE ENVIRONMENT AND BIOTECHNOLOGY, v.55, no.3, pp.175 - 182
Abstract
This study was carried out to investigate the responses of cyclamen to gibberellic acids (GAs) and GA biosynthesis inhibitors under different temperature and light intensity during different period, and then to examine the changes in GA level and sensitivity to GA under these environmental conditions. 'Metis Scarlet Red' cyclamen plants with 15 fully unfolded leaves were grown under in three controlled environment chambers maintained at 16/12 (LT), 22/18 (MT), 28/24A degrees C (HT) (day/night), respectively. In each chamber, there were growth modules which provided three photosynthetic photon fluxes (PPFs) [60 (LL), 120 (ML), 240 (HL) mu mola (TM) m(-2)a (TM) s(-1)] at canopy height with 16 hours (08:00-24:00) of photoperiod by fluorescent lamps. Exogenous GA(3) and GA(4+7) increased petiole length at all PPF and temperature treatments and the promoting effect was larger under higher PPF irrespective of temperature. But, daminozide and paclobutrazol inhibited petiole elongation rate and inhibition activity increased with decreasing PPF. GA(3) nullified the inhibiting effect on petiole elongation by daminozide. However, there were significant differences in the elongation rate promoted and inhibited by GA(3) and daminozide, respectively, between PPFs and temperatures. Promoting effects of GA(3) on petiole elongation increased with decreasing PPF and increasing temperature.
URI
http://hdl.handle.net/YU.REPOSITORY/31914http://dx.doi.org/10.1007/s13580-014-0135-1
ISSN
2211-3452
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자연자원대학 > 원예생명과학과 > Articles
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