Long-day Requirement for Floral Induction in Lythrum salicaria 'Dwarf Pink

• 발행기관: 인간식물환경학회
• 저자명: Seungeun Chung Ji woo Park Nam Hyun Im Hyo Beom Lee
• 간행물 정보: 『인간식물환경학회지(JPPE)』제27권 제4호, 269~278쪽, 전체 10쪽
• 주제분류: 자연과학 > 자연과학일반
• 파일형태: PDF
• 발행일자: 2024.08.31

국문 초록

Background and objective: Lythrum salicaria 'Dwarf Pink' is a dwarf-type cultivar of purple loosestrife with a potentialornamental value as a garden plant. This study was conducted to determine a photoperiodic requirement for floral inductionand the effects of plant size on flowering characteristics in L. salicaria 'Dwarf Pink'. Methods: In experiment 1, seedlings with an average of 17.7 leaves were grown under five different photoperiods: 9/15,12/12, 14/10, 16/8, and 24/0 h (day/night hours) for 12 weeks. In experiment 2, the same daylengths were delivered totwo groups with different leaf counts of 8.5 (stage 1) and 21.1 (stage 2). Results: In experiment 1, after four weeks of photoperiod treatments, floral buds started to develop under 16/8 and 24/0h of long-day conditions, and these plants showed 100% flowering. There were no significant differences in the days tovisible bud between the plants under 16/8 and 24/0 h. Plants under 9/15 and 12/12 h did not flower. Although floralinduction was observed under 14/10 h, the flowering percentage was 17% at the end of the experiment. In experiment2, plant size did not induce significant differences in the days to flowering and the number of nodes. Under the samelong-day condition, when the plant size was large, the number of inflorescences and branches was less than the smallplants. However, in both experiments, plant height and the number of branches significantly increased with increasingphotoperiod. Conclusion: These results indicated that L. salicaria 'Dwarf Pink' could be categorized as an obligate long-day plant, andunder the long-day conditions, the plant size did not affect the days to flowering. However, when the plant size wassignificantly large under long-day conditions, the number of inflorescences and the number of branches decreased,affecting the quality of flowering.

목차

Introduction

Research Methods

Results

Discussion

Conclusion

References

키워드

flowering inductive photoperiod long-day plant photoperiodism plant size