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학술연구/단체지원/교육 등 연구자 활동을 지속하도록 DBpia가 지원하고 있어요.
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논문 기본 정보
- 자료유형
- 학술저널
- 저자정보
- 발행연도
- 2015.1
- 수록면
- 215 - 222 (8page)
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초록· 키워드
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The radish (Raphanus sativus L.) is an important Brassicaceae root vegetable crop worldwide. Several studies have been conducted concerning radish breeding. There are major challenges to prevent premature bolting in spring plantings. Here, we performed the characterization of two inbred radish lines which vary in bolting time. “Late bolting radish” (NH-JS1) and “early bolting radish” (NH-JS2) were generated by a conventional breeding approach. The two inbred lines showed different bolting phenotypes depending on vernalization time at 4°C. NH-JS1, the late bolting radish, was less sensitive to cold treatment and the less sensitivity was inversely proportional to the duration of the vernalization.
We also measured gene expression levels of the major bolting time related genes in the NH-JS1 and NH-JS2 lines.
RsFLC1 plays a central role in the timing of flowering initiation. It is a strong repressor and it’s transcript is highly expressed in NH-JS1 compared to NH-JS2 under no treatment and vernalization conditions. RsFRI, a positive regulator of RsFLC, is also highly expressed in NH-JS1 compared to NH-JS2 regardless of vernalization. In contrast, RsSOC1, suppressed by FLC as a floral integrator gene, showed the most difference, a 5-fold increase, between NH-JS1 and NH-JS2 under vernalization conditions. From these results, we conclude that NH-JS1 showed a late flowering phenotype after cold treatment due to the expression differences of flowering time regulator genes rather than difference sensitivity to cold. These results may be useful to understand the control mechanisms of flowering time and may help identify molecular markers for selecting late bolting trait in radish.
목차
등록된 정보가 없습니다.
참고문헌 (22)
참고문헌 신청
Amasino R / 2004 / Vernalization, competence, and the epigenetic memory of winter / Plant Cell 16 : 2553 ~ 2559
Amasino R / 2010 / Seasonal and developmental timing of flowering / Plant J 61 : 1001 ~ 1013
Bastow R / 2004 / Vernalization requires epigenetic silencing of FLC by histone methylation / Nature 427 : 164 ~ 167
Bernier G / 1993 / Physiological Signals That Induce Flowering / Plant Cell 5 : 1147 ~ 1155
Chouard P / 1960 / Vernalization and its Relations to Dormancy / Annual Review of Plant Physiology 11 : 191 ~ 238
Amasino R / 2010 / Seasonal and developmental timing of flowering / Plant J 61 : 1001 ~ 1013
Bastow R / 2004 / Vernalization requires epigenetic silencing of FLC by histone methylation / Nature 427 : 164 ~ 167
Bernier G / 1993 / Physiological Signals That Induce Flowering / Plant Cell 5 : 1147 ~ 1155
Chouard P / 1960 / Vernalization and its Relations to Dormancy / Annual Review of Plant Physiology 11 : 191 ~ 238
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