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Ki Sun Kim - One of the best experts on this subject based on the ideXlab platform.
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shoot elongation and gibberellin contents in cyclamen persicum are influenced by temperature and light intensity
Horticulture Environment and Biotechnology, 2015Co-Authors: Jiseon Kim, In-jung Lee, Yoonha Kim, Ki Sun KimAbstract:Elongated petioles and wide leaf laminas decrease the ornamental quality of potted cyclamen (Cyclamen persicum). We determined the relationship between leaf petiole elongation and lamina expansion and endogenous gibberellins (GAs) of cyclamen as influenced by light intensity, daily light integral (DLI), and temperature. ‘Metis Scarlet Red’ cyclamen plants with five fully unfolded leaves were cultivated in growth chambers maintained at 14°C (low temperature, LT) and 26°C (high temperature, HT) and illuminated at 60 and 240 µmol·m-2·s-1 PPF [(low light (LL) and high light (HL), respectively] with 8 h (short day, SD) and 16 h (long day, LD) photoperiods by fluorescent lamps, giving a total of eight treatments. HT and LL increased petiole length, plant height, and leaf size. There was no significant effect of photoperiod on plant height or petiole length. ‘Metis Scarlet Red’ cyclamen had GA1 and GA4 as active GAs with a similar concentration. The concentration of active GAs was higher in plants grown at the HT compaRed to the LT. Concentrations of GA20 and GA1, products in the early C-13-hydroxylation pathway, and GA9 and GA4, products of the non C-13-hydroxylation pathway, were higher in plants grown under LL than HL. Petiole length increased linearly by about 6 cm (200%) in all eight treatments as the concentration of active GAs (GA1 + GA4) increased from 12 to 34 ng·g-1. These results indicate that temperature and DLI regulated petiole length of cyclamen by controlling the content of active GAs.
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light intensity and temperature regulate petiole elongation by controlling the content of and sensitivity to gibberellin in cyclamen persicum
Horticulture Environment and Biotechnology, 2014Co-Authors: Ki Sun KimAbstract: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), 28/24°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) μmol∙m−2∙s−1] at canopy height with 16 hours (08:00–24:00) of photoperiod by fluorescent lamps. Exogenous GA3 and GA4+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. GA3 nullified the inhibiting effect on petiole elongation by daminozide. However, there were significant differences in the elongation rate promoted and inhibited by GA3 and daminozide, respectively, between PPFs and temperatures. Promoting effects of GA3 on petiole elongation increased with decreasing PPF and increasing temperature.
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temperature and light intensity induce morphological and anatomical changes of leaf petiole and lamina in cyclamen persicum
Horticulture Environment and Biotechnology, 2010Co-Authors: Ki Sun KimAbstract:We report here the petiole elongation pattern and the morphological and anatomical changes of cyclamen leaf under different temperatures and light intensities to determine the cause of quality deterioration by over-expended petiole and leaf. ‘Metis Scarlet Red’ cyclamen plants with 5 fully unfolded leaves were grown under in three controlled environment chambers maintained at 16/12 (LT), 22/18 (MT), 28/24℃ (HT) (day/night), respectively. In each chamber, there were growth modules which provided three photosynthetic photon fluxes [PPF; 60 (LL), 120 (ML), 240 (HL) μmolㆍm?²?s?¹] at canopy height with 16 h (08:00-24:00) of photoperiod by fluorescent lamps. LL and HT promoted petiole elongation and leaf expansion mainly by cell elongation. The plants grown at HT had longer petioles even at relatively high PPF than those exposed to LT. Leaves at LL were larger and thinner in cross section than those at HL. Leaves at HL had long and well-developed palisade layers, whereas those at LL had only one short and poorly developed palisade layer. LL decreased stomatal density and number epidermal cells per unit area compaRed with HL.
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photosynthetic daily light integral influences flowering time and crop characteristics of cyclamen persicum
Hortscience, 2009Co-Authors: In Hye Cheon, Ki Sun Kim, Erik S RunkleAbstract:This study was carried out to examine the effect of photosynthetic daily light integral (DLI) on the growth and flowering of cyclamen (Cyclamen persicum Mill. 'Metis Scarlet Red'). Plants with six fully unfolded leaves were grown at 24/16 8C (12 h/12 h) under an 8- or 16-h photoperiod at a photosynthetic photon flux of 50, 100, 150, 200, and 300 mmolm -2 s -1 , which provided seven DLIs: 1.4, 2.9, 4.3, 5.8, 8.6, 11.5, and 17.3 molm -2 d -1 . Days to first flower decreased from 133 to 75 as DLI increased from 1.4 to 17.3 molm -2 d -1 , although the acceleration of flowering was less pronounced when the DLI wasgreater than5.8 molm -2 d -1 . Meanleaf andflowernumberincreased from8.7 to 28.0 and from 0 to 14.7, respectively, as DLI increased from 1.4 to 11.5 molm -2 d -1 , but there was no further increase under a DLI of 17.3 molm -2 d -1 . Total dry weight and net photosynthetic rate showed a similar trend as leaf and flower number. We conclude that supplemental lighting can accelerate greenhouse production of potted cyclamen under a low ambient DLI (i.e., less than 12 molm -2 d -1 ).
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night interruption and cyclic lighting promote flowering of cyclamen persicum under low temperature regime
Horticulture Environment and Biotechnology, 2008Co-Authors: Kyeong Joo Kang, Jong Hwa Shin, Ki Sun KimAbstract:Night interruption (NI) is consideRed as an alternative method to heating for acceleration of flowering in Cyclamen persicum Mill. Seedlings of 'Metis Scarlet Red' cyclamen with 5-6 unfolded leaves were grown under three NI durations (0, 2, 4 h), two cyclic lightings (CL) (6'/54', 6'/24' on/off for 4 h) and two temperature regimes (16, 20℃) to determine their effects on flowering. Photoperiod of all treatments deliveRed by fluorescent lamps was 9 h and NI and CL treatments were provided by three-wave lamps during the middle of the dark period. Plants grown at 20℃ floweRed at 53 days after treatment which was 12 days earlier than those grown at 16℃. NI and CL promoted flowering and plant growth in each temperature. Plants grown at 16℃ with all NI and CL treatments floweRed at similar times and obtained a similar number of flower buds and leaves as those grown at 20℃ SD. There was no difference in the fresh and dry weights of both shoots and roots between 16℃with NI and 20℃SD. Five NI treatments under low temperature were relatively effective in inducing flowering in cyclamen. Therefore, NI and CL treatments could be recommended to promote the growth and flowering of cyclamen in order to save heating cost under low temperature regimes.
Allen, Gerald R. - One of the best experts on this subject based on the ideXlab platform.
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Cirrhilabrus greeni, a new species of wrasse (Pisces: Labridae) from the Timor Sea, northern Australia
2017Co-Authors: Allen, Gerald R., Hammer, Mark P.Abstract:A new species of labrid fish, the Sunset Fairy-wrasse, Cirrhilabrus greeni n. sp., is described from seven specimens, 39.4–47.3 mm SL, collected from the eastern Timor Sea, Northern Territory, Australia. The species is clearly distinguished by its terminal-phase male color pattern, consisting of pink to Reddish hues on the upper half of the head and body and yellow on the lower half, in combination with a mainly yellow-orange dorsal fin and a Scarlet-Red anal fin. The caudal fin of the male is particularly distinctive, being emarginate but appearing lunate due to a clear central portion and tapering Red bands along dorsal and ventral margins. Females can be distinguished from sympatric congeners by having a large black spot on the upper caudal peduncle. Sequencing of the mtDNA-barcode marker COI reveals that the new species has identical sequences to C. rubripinnis and C. aff. tonozukai from the Philippines, which have very different color patterns and tail shapes from the new species, indicating the new species has diverged recently and/or there is historic or episodic hybridization within the species complex
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Cirrhilabrus hygroxerus, a new species of fairy wrasse (Pisces: Labridae) from the Timor Sea, northern Australia.
2016Co-Authors: Allen, Gerald R., Hammer, Michael P.Abstract:A new species of labrid fish, Cirrhilabrus hygroxerus, is described from 19 type specimens, 38.4–56.1 mm SL, collected from the eastern Timor Sea, Northern Territory, Australia. The new taxon belongs to a species complex containing five other Indo-Pacific species, comprising C. humanni (western Lesser Sunda Islands of Indonesia and East Timor), C. joanallenae (western Sumatra), C. morrisoni (Hibernia Reef, western Timor Sea), C. naokoae (Nias Island, western Sumatra), and the widespread C. rubriventralis (Red Sea, western Indian Ocean, Maldives, and Sri Lanka). Members of this complex typically have a single row of scales on the cheek and share the unique combination in the terminal-phase (TP) male of an elevated anterior dorsal fin, rounded caudal fin, and large fan or club-shaped pelvic fins without filamentous extensions. The new species is most similar to C. humanni and C. morrisoni, and the three species have apparently allopatric distributions in the Timor Sea-western Sunda Islands region. These three species share a uniquely shaped dorsal fin characterized by the presence of an anterior elevated, spike-like pennant. The best means of separating these species are differences in the color patterns of the TP male, primarily on the head, upper body, and on the dorsal, anal, and pelvic fins. The new species is distinguished by a combination of a yellow-orange upper head, blackish upper body, mainly blackish dorsal fin, and Scarlet-Red pelvic and anal fins. The female of C. hygroxerus is most similar to that of C. morrisoni, sharing a yellowish head and yellow pectoral-fin base
J L Brisset - One of the best experts on this subject based on the ideXlab platform.
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plasmachemical degradation of azo dyes by humid air plasma yellow supranol 4 gl Scarlet Red nylosan f3 gl and industrial waste
Water Research, 2004Co-Authors: Fatiha Abdelmalek, S Gharbi, B Benstaali, A Addou, J L BrissetAbstract:Abstract A recent non-thermal plasma technique (i.e., a gliding arc discharge which generates reactive species at atmospheric pressure) is tested for pollution abatement of dyes dispersed in synthetic solutions and industrial effluents. Yellow Supranol 4 GL (YS) and Scarlet Red Nylosan F3 GL (SRN) are toxic synthetic dyes widely used in the Algerian textile industry and frequently present in liquid wastes of manufacture plants. Classical removal treatment processes are not efficient enough, so that the presence of dyes in liquid effluents may cause serious environmental problems, in connection with reusing waste waters for irrigation. The degradation processes achieved by the oxidising species formed in the plasma are followed by UV/VIS spectroscopy and by chemical oxygen demand measurements. They are almost complete (i.e., 92.5% for YS and 90% for dilute SRN) and rapidly follow pseudo-first-order laws, with overall estimated rate constants 3×10 −4 and 4×10 −4 s −1 for YS and SRN, respectively. The degradation rate constant for the industrial mixture (i.e., k =1.45×10 −3 s −1 ) is a mean value for two consecutive steps (2 10 −3 and 6×10 −5 s −1 ) measuRed at the absorption peaks of the major constituent dyes, YS and SRN.
Prema Dhanraj - One of the best experts on this subject based on the ideXlab platform.
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A Clinical Study Comparing Helicoll with Scarlet Red and OpSite in the Treatment of Split Thickness Skin Graft Donor Sites—A Randomized Controlled Trial
Indian Journal of Surgery, 2015Co-Authors: Prema DhanrajAbstract:Split thickness skin graft (STSG) is a key method in the reconstructive ladder for covering skin defects used widely by surgeons from all specialties. The donor site is often a source of delayed healing, associated with considerable pain and discomfort even more than the recipient wound. The aim of this prospective randomized controlled study was to compare Helicoll® (EnColl Corp., Fremont, CA, USA), a type I pure collagen dressing, to OpSite® (Smith & Nephew, USA) dressing and to Scarlet Red® (Kendall HealthCare, USA) dressing in the treatment of standardized STSG donor sites. Thirty patients, over a 3-month period, underwent various reconstructive procedures, necessitating the use of STSGs. Following a simple randomized clinical protocol, the analysis of data included donor site pain, healing time of the donor site, initial absorption of the applied dressing and rate of infection with the three different dressings to form the basis of this paper. Patients in the Helicoll group reported significantly less pain, less infection rate and requiRed no dressing change when compaRed with the OpSite (Johnson & Johnson, Langhorne, PA, USA) or the Scarlet Red groups. Healing time of the donor site in the Helicoll group was shorter than that in the Scarlet Red group; however, it was comparable to the OpSite group. This study indicates that Helicoll, as a donor site dressing, is successful in providing pain-free mobility with a measurable healing rate.
Hammer, Mark P. - One of the best experts on this subject based on the ideXlab platform.
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Cirrhilabrus greeni, a new species of wrasse (Pisces: Labridae) from the Timor Sea, northern Australia
2017Co-Authors: Allen, Gerald R., Hammer, Mark P.Abstract:A new species of labrid fish, the Sunset Fairy-wrasse, Cirrhilabrus greeni n. sp., is described from seven specimens, 39.4–47.3 mm SL, collected from the eastern Timor Sea, Northern Territory, Australia. The species is clearly distinguished by its terminal-phase male color pattern, consisting of pink to Reddish hues on the upper half of the head and body and yellow on the lower half, in combination with a mainly yellow-orange dorsal fin and a Scarlet-Red anal fin. The caudal fin of the male is particularly distinctive, being emarginate but appearing lunate due to a clear central portion and tapering Red bands along dorsal and ventral margins. Females can be distinguished from sympatric congeners by having a large black spot on the upper caudal peduncle. Sequencing of the mtDNA-barcode marker COI reveals that the new species has identical sequences to C. rubripinnis and C. aff. tonozukai from the Philippines, which have very different color patterns and tail shapes from the new species, indicating the new species has diverged recently and/or there is historic or episodic hybridization within the species complex
