• Title/Summary/Keyword: gerbera

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Morphological, Physiological and Biochemical Responses of Gerbera Cultivars to Heat Stress

  • Chen, Wen;Zhu, Xiaoyun;Han, Weiqing;Wu, Zheng;Lai, Qixian
    • Horticultural Science & Technology
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    • v.34 no.1
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    • pp.1-14
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    • 2016
  • Heat stress is an agricultural problem for Gerbera jamesonii, and it often causes poor seedling growth, reduced flower yield and undesirable ornamental characteristics of flowers. However, little is known about the effect of heat stress on the morphological, physiological and biochemical characteristics of gerbera plants. Here, the responses of six cultivars of Gerbera jamesonii to heat stress were investigated. Under a 1-d heat treatment at $45^{\circ}C$, the leaves of gerbera cultivars showed yellowing, wilting, drying and death to varying degrees. The heat treatment also resulted in increased electrical conductivity, decreased soluble protein and chlorophyll contents, and the accumulation of malondialdehyde (MDA) and proline in leaves. Moreover, heat tolerance differed among the six tested gerbera cultivars. Our results demonstrated that among the six gerbera cultivars, 'Meihongheixin' is a heat-resistant cultivar, whereas 'Beijixing' is a heat-sensitive one. 'Shijihong' and 'Linglong' are relatively heat-resistant cultivars, and 'Dadifen' and 'Taiyangfengbao' are relatively heat sensitive.

Breeding of a New Bright Yellow Gerbera 'Sunmyo' with High Yield for Cut Flower (황색 절화용 다수성 거베라 신품종 '선묘' 육성)

  • Park, Jae-Suk;Chung, Mi-Young;Kim, Chang-Kil
    • Horticultural Science & Technology
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    • v.29 no.2
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    • pp.156-159
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    • 2011
  • A new bright yellow gerbera (Gerbera hybrida Hort.), 'Sunmyo' was bred from a cross between red medium-gerbera 'Beauty' and yellow gerbera 'Tamara' in 2001. Characteristics trials were conducted three times from 2004 to 2006. Bred cultivar 'Sunmyo' showed bright yellow color (YG12B), black center, semi-double type, and middle size flower with stable flower shape. The average yield of 'Sunmyo' increased up to 37% (70.0 stems per year) as compared to control cultivar 'Biro' (51.0 stems per year). The vase life is 7.5 days. The survival rate is 85.0%, and days to first flowering are 95 in the plastic house passing the winter season.

A New Gerbera Cultivar "Pink Swan"; High-yielding Cultivar with Pink and Semi-double for Cut-flower

  • Park, Sang Kun;Lim, Jin Hee;Kim, Mi Seon;Joung, Hyang Young;Shin, Hak Ki;Cho, Hae Ryong;Rhee, Hye Kyung
    • Korean Journal of Breeding Science
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    • v.41 no.4
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    • pp.539-542
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    • 2009
  • A new gerbera variety "Pink Swan" was released by the National Horticultural Research Institute (NHRI) in 2007. A cross was made between "Royal" with orange and single and 'Himalaya' with white and semi-double in 2004. After investigation of the characteristics for 4 years (from 2004 to 2007), it was selected specially for the use of cut-flower. "Pink Swan" is a vigorous medium-sized cultivar with pink (RHS R48D), yellow green center and semi-double. The average flower diameter is 10.6 cm. And inner ray floret and disc diameter is 5.99cm and 1.83cm, respectively. It produces a large yield with continuous supply of flowers and has adequate peduncle height. We believe that "Pink Swan" has a great potential for expanding cultivated area of domestic gerbera cultivar and increasing farmers-income.

A New Gerbera Variety 'Yellow Wing' : High-yielding Cultivar with Yellow and Spider type for Cut-flower

  • Park, Sang Kun;Lim, Jin Hee;Kim, Mi Seon;Joung, Hyang Young;Shin, Hak Ki;Cho, Hae Ryong;Rhee, Hye Kyung
    • Korean Journal of Breeding Science
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    • v.40 no.4
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    • pp.499-502
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    • 2008
  • A new gerbera variety 'Yellow Wing' was released by the National Horticultural Research Institute (NHRI) in 2007. A cross was made between 'Gold Finger' with yellow and single and 'Yellow Springs' with yellow and spider in 2004. After investigation of the characteristics for 4 years (from 2004 to 2007), it was selected specially for the use of cut-flower. 'Yellow Wing' is a vigorous cultivar with yellow (RHS YO14B), green center and spider type. The flower diameter is 10.6cm. And inner ray floret and disc diameter is 2.83cm and 2.03cm, respectively. It produces a large yield with continuous supply of flowers and has adequate peduncle height and brilliant color. We believe that 'Yellow Wing' has a great potential for expanding cultivated area of domestic gerbera cultivar and increasing farmers-income.

Optimization of Genetic Transformation Conditions for Korean Gerbera Lines (국내 거베라 육종계통 형질전환 기초 조건 확립)

  • Lee, Hye-Young;Lee, Ki-Jung;Jeon, Eun-Hee;Shin, Sang-Hyun;Lee, Jai-Heon;Kim, Doh-Hoon;Chung, Dae-Soo;Chung, Yong-Mo;Cho, Yong-Cho;Kim, Jeong-Kook;Chung, Young-Soo
    • Journal of Plant Biotechnology
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    • v.33 no.1
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    • pp.49-56
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    • 2006
  • Gerber (Gerbera hybrida) is a valuable ornamental species grown as a potted plant and cut flowers. However, genetic variability within the gerbera genus is very limited. So it is absolutely needed to introduce and widen genetic resources into gerbera lines by genetic transformation. For the purpose, 18 Korean gerbera lines were screened to establish Agrobacterium-mediated genetic transformation procedure. In an experiment to select Korean gerbera lines which are amenable to Agrobacterium-inoculation, 12 lines turned out to be positive in Agrobacterium-inoculation. More callus were produced from BA 2ppm, Zeatin 2ppm, IAA 0.2ppm in pre-culture and regeneration medium (2X media) but there was no difference in the frequency of GUS expression rate. In another experiment to find out optimal condition for highly efficient Agrobacterium-inoculation, petiole and leaf explants have been treated with four different pre-culture periods, two different co-culture periods and two different Agrobacterium strains. As a result, high GUS expression has been showed from petiole and leaf explants treated no pre-culture period with LBA4404 Agrobacterium tumerfaciens, 5 day co-culture period and dipping treatment.

In vitro shoot regeneration and genetic transformation of the gerbera (Gerbera hybrida Hort.) cultivar 'Gold Eye'

  • Chung, Mi-Young;Kim, Min Bae;Chung, Yong Mo;Nou, Ill-Sup;Kim, Chang Kil
    • Journal of Plant Biotechnology
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    • v.43 no.2
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    • pp.255-260
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    • 2016
  • This research was conducted to improve the cold tolerance of the gerbera cv. Gold Eye by introduction of the Arabidopsis $Ca^{2+}/H^+$ antiporter gene (CAX1) via Agrobacterium-mediated transformation. Prior to genetic transformation, we optimized a combination of plant growth regulators; $1.0mgl^{-1}$ 6-Benzyladenine (BA) and $0.1mgl^{-1}$3-indole-acetic acid (IAA) were found to lead to proper in vitro shoot regeneration from petiole explants. In addition, $50mgl^{-1}$ kanamycin was determined to be the minimal concentration useful for selection of putative transgenic plants. In this study, transgenic gerbera expressing the Arabidopsis $Ca^{2+}/H^+$ antiporter gene (CAX1) were obtained using the optimized concentrations. We expect that introduction of the gene to the cultivar will improve cold tolerance, which will be important in the winter months.

Influence of basal medium formulations and silver nanoparticles on in vitro plant growth in gerbera

  • Hyun Hee Kang;Aung Htay Naing;Junping Xu;Mi Young Chung;Su Young Lee;Jeung-Sul Han;Chang Kil Kim
    • Journal of Plant Biotechnology
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    • v.50
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    • pp.183-189
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    • 2023
  • This study investigated the impact of two distinct MS basal media: one containing FeNaEDTA and the other FeEDDHA, on the growth of five unique gerbera cultivars (Shy Pink, Pink Holic, Breeze, Harmony, Snow Dream). Notably, the response to these media types varied significantly among the cultivars, particularly concerning leaf yellowing and plant growth. 'Shiny Pink' and 'Pink Holic' exhibited leaf yellowing on the FeNaEDTA-containing medium but displayed leaf greening on the FeEDDHA-containing medium. In contrast, 'Snow Dream,' 'Harmony,' and 'Breeze' remained unaffected on both medium types. However, the FeNaEDTA-containing medium promoted higher plant height and petiole length in 'Breeze,' 'Harmony,' and 'Snow Dream' than the FeNaEDTA-containing medium did. A promotive effect of silver nanoparticles (AgNPs) on plant growth and leaf greening was observed in 'Pink Holic,' particularly on the FeNaEDTA-containing medium, while the addition of AgNPs to the FeEDDHA-containing medium negatively affected plant growth. These results highlight the substantial influence of medium type, specifically the presence of FeNaEDTA or FeEDDHA, on gerbera growth responses, emphasizing the critical role of medium selection in gerbera propagation. Additionally, when contemplating the addition of AgNPs for in vitro gerbera propagation, it is crucial to consider the medium type.

Breeding, Genetic Analysis, and Vase-life of Bright Yellow Gerbera Cultivar 'Joyful' for Cut Flower (화색이 선명한 황색 절화용 거베라 '조이풀' 육성과 유전적 분석 및 절화 수명 특성)

  • Chung, Yong-Mo;Lee, Jung-Soo;Lee, Byeong-Jeong;Kwon, Oh-Chang
    • Horticultural Science & Technology
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    • v.34 no.6
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    • pp.966-976
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    • 2016
  • A new bright yellow gerbera (Gerbera hybrida Hort.) cultivar, 'Joyful', was released by the Flower Research Institute of Gyeongsangnam-do Agricultural Research & Extension Service in 2013. 'Joyful' was developed in Changwon from 2005 to 2006 and is a cross between 'Chowoo', a semi-double type gerbera cultivar with yellow-orange colored flowers, and 'Focus', a semi-double type cultivar with yellow colored flowers. The characteristics trials for selection were conducted from 2007 to 2009. 'Joyful' has large, semi-double type flowers with yellow (RHS, 12-A) ray florets and a brown central part. It also has a stable flower shape, strong peduncles, and a vase life of 12.8 days. The average flower yield of 'Joyful' was determined in greenhouse trials carried out from 2008 to 2010 and is 49.2 stems per plant per year. 'Joyful' was demonstrated to be a new cultivar based on ploidy tests and RAPD analysis and was registered (Grant No. 4574) to the Korea Seed and Variety Service (KSVS) for commercialization in 2013.