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논문 기본 정보

자료유형
학술저널
저자정보
Cho Jum Rae (Applied Entomology Division, Department of Agricultural Biology, National Institute of Agricultural Science and Technology Rural Development Administration) Lee Jeong Seok (Agricultural Research Center, Hankooksamkong) Kim Jeong Jun (Applied Entomology Division, Department of Agricultural Biology, National Institute of Agricultural Science and Technology Rural Development Administration) Lee Minho (Applied Entomology Division, Department of Agricultural Biology, National Institute of Agricultural Science and Technology Rural Development Administration) Kim Hong Sun (Applied Entomology Division, Department of Agricultural Biology, National Institute of Agricultural Science and Technology Rural Development Administration) Boo Kyung Saeng (Department of Entomology, School of Agricultural Biotechnology, Seoul National University)
저널정보
한국응용곤충학회 Journal of Asia-Pacific Entomology Journal of asia-pacific entomology 제8권 제2호
발행연도
2005.1
수록면
161 - 166 (6page)

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This study was carried out to investigate the supercooling point (SCP), cold hardiness, and content of glycerol in the rice stem borer, Chilo suppressalis, larvae field-collected at different dates to understand the relationship between diapause and cold hardiness. Field-collected C. suppressalis larvae became cold-hardy from late autumn and higher level of survival was maintained from October to April. Lab-reared C. suppressalis larvae pre-treated at $0^{\circ}C$ for 1 h or 2 h enhanced their survival to low temperature $(-10^{\circ}C)$. The SCP of C. suppressalis larvae changed seasonally, with dramatic decrease toward February and then drastic increase again from March onwards. The osmolality and protein content of field-collected C. suppressalis larvae showed. their peak in January, and then dramatically decclined afterwards. Overwintering C. suppressalis larvae have the ability to accumulate glycerol. Higher osmolality may be closely linked to lower SCP. This lower SCP probably develops a high level of cold hardiness during diapause development. The thermal hysteresis activity of C. suppressalis larva field-collected increased gradually to $12.7{\pm}1.6^{\circ}C$ in January, and then gradually declined afterwards. It can be recognized that field-collected C. suppressalis larvae have the thermal hysteresis proteins. Diapause- induced. C. suppressalis larvae (kept at $15^{\circ}C$ under a photoperiod of 10L: 14D h) enhanced a significantly higher survival and osmolality. In diapause-destined C. suppressalis, therefore, increased cold tolerance can be linked to the diapausing state itself.

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