• Research in Plant Disease
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• v.23 no.4
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• pp.383-387
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• 2017

In 2016, less than 30% of virus-like symptoms such as chlorosis, necrosis and ringspots were observed in Hoya carnosa from commercial greenhouse in Eumseong, Korea. A total of 6 samples from Hoya carnosa were collected both symptomatic and asymptomatic plants and tested for virus infection by RT-PCR of 3 viruses known to infect Hoya spp. including Tomato spotted wilt virus (TSWV), Impatiens necrotic spot virus (INSV) and Tomato chlorotic spot virus (TCSV). Three symptomatic samples were positives for INSV. Also, it was not the virus detected in three asymptomatic samples. To further confirm the presence of INSV, complete nucleocapsid (N) gene of the virus were amplified and sequenced from two samples. BLAST analysis of the consensus sequence showed that two isolates (INSV-Hy1 and -Hy2) shared nucleotide sequence identities of 99% with each other and 97-99% with other INSV isolates available in the GenbBank. Phylogenetic analysis showed that these isolates closely related to the INSV isolates from ornamental from China. This is the first report of INSV on Hoya carnosa from Korea.

• Journal of the Korean Institute of Landscape Architecture
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• v.27 no.5
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• pp.114-119
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• 2000

This study was carried out to obtain fundamental information of growth response of ground cover plants under artificial light quality at indoor. Aglaonema 'Silver Queen', Hedera helix L., Hoya carnosa 'Tricolor' and Saintpaulia ionantha 'Frances' were examined under a 400lux light intensity consisted of Mercury lamp, True-lite lamp, incandescent lamp, dark-room and sunlight indoor condition. A data analysis were performed by GLM, Duncan's multiple range test and mean score with SAS program. Results of experiments are as follows; 1. A plant growth status was better showed under the True-lite lamp than sunlight. 2. A Saintpaulia ionantha flower color was responded in the first place, the deep pinkish red color of Saintpaulia ionantha flower was obtained under Mercury lamp and "True-lite lamp", "sunlight", and incandescent lamp were follow. Flower numbers of Saintpaulia ionantha after 60 days tended to decrease under every artificial light quality. 3. Leaf length and leaf width were increased under True-lite lamp, but most of plants was not significantly affected by artificial light quality. 4. A stem length of Hedera helix was increased the highest rank under sunlight also, one of artificial light, the highest increase rank was showed under incandescent lamp. 5. Chlorophyll content was highly increased under Mercury lamp, but was responded poor under incandescent lamp.