Growth and Flowering by Relighting and Daminozide Treatment in the Flower Bud Formation Stage of Chrysanthemum morifolium ‘Baekma’ Cut Flowers

IF 1 4区 农林科学 Q3 HORTICULTURE Korean Journal of Horticultural Science & Technology Pub Date : 2021-04-01 DOI:10.7235/HORT.20210018
Y. S. Roh, Y. Yoo
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引用次数: 2

Abstract

This study was conducted to examine the effects of relighting and daminozide treatment on growth and flowering characteristics, length of cut flowers, upper leaf size, and peduncle length in the flower bud formation stage of Chrysanthemum morifolium ‘Baekma’. Relighting for 4-8 hr at 10 days after transition to short-day conditions increased the length of cut flowers, number of leaves, flower diameter, and fresh weight of flowers compared to the control. The upper leaf area was biggest after relighting for 8 hr than in the other treatments. However, relighting for 4-8 hr was not effective for increasing the number of ray florets and delayed flowering by 6-8 days. The two daminozide treatments at 18 (stage I) and 28 (stage II) days after transition to short-day conditions shortened the length of cut flowers, but number of leaves and fresh weight of cut flowers increased in all other daminozide treatments. The peduncle length was longest in the control and was 2.6-3.2 cm in one treatment with 800 mg·L -1 daminozide and two treatments with 400 and 800 mg·L -1 daminozide regardless of stage. The upper leaf area was the smallest in control and biggest in one treatment with 800 mg·L -1 daminozide at stage I and two treatments with 400 mg·L -1 at stage I and 800 mg·L -1 daminozide at stage II. The flower diameter and fresh weight were greater in daminozide treatments than in the control. The number of ray florets increased by 9-11% in one treatment with 800 mg·L -1 at stage I or 400 mg·L -1 daminozide at stage II but decreased in two treatments of daminozide. The days to flowering were delayed by 2-6 days in daminozide treatments than in control. Therefore, it is suggested that relighting for 8 hr at 10 days and treatment of 800 mg·L -1 daminozide at 18 days after transition to short-day conditions are effective in improving the quality of cut flowers by shortening the peduncle length and increasing the growth of the upper leaf area, the length of cut flowers, and the flower diameter. Additional key words: days to flowering, peduncle length, ray florets, short-day condition, upper leaf size
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白菊切花形成花蕾期光照和达米诺肼处理的生长和开花研究
本研究旨在研究重光和山莨菪碱处理对白菊花花蕾形成期的生长和开花特性、切花长度、上部叶片大小和花序梗长度的影响。与对照相比,在过渡到短日条件后的10天重新照明4-8小时增加了切花的长度、叶片数量、花径和花的鲜重。再光照8小时后,上部叶面积最大。然而,重新照明4-8小时对增加射线小花数量和延迟开花6-8天无效。在过渡到短日条件后的18天(第一阶段)和28天(第二阶段)的两个达米诺齐特处理缩短了切花的长度,但在所有其他达米诺齐处理中,叶片数量和切花的鲜重都增加了。对照组的花序梗长度最长,在一次800 mg·L-1的达米诺齐特处理和两次400和800 mg·L-1的达米诺齐特处理中,无论分期如何,花序梗长度均为2.6-3.2cm。对照组的上部叶面积最小,一个处理在第一阶段用800mg·L-1的达米诺齐特处理,两个处理在第二阶段用400mg·L-11的达米诺齐特处理。达米诺齐特处理的花径和鲜重均大于对照。在第一阶段用800mg·L-1或在第二阶段用400mg·L-1处理的一个处理中,射线小花数增加了9-11%,但在两个处理中都有所减少。达米诺齐特处理的开花天数比对照延迟2-6天。因此,建议在过渡到短日条件后的第10天再点燃8小时,并在第18天处理800mg·L-1的达氨酰肼,可以通过缩短花序梗长度和增加上部叶面积、插花长度和花径来有效地改善切花的质量。附加关键词:开花天数,花序梗长度,射线小花,短日条件,上部叶片大小
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审稿时长
1 months
期刊介绍: Horticultural Science and Technology (abbr. Hortic. Sci. Technol., herein ‘HST’; ISSN, 1226-8763), one of the two official journals of the Korean Society for Horticultural Science (KSHS), was launched in 1998 to provides scientific and professional publication on technology and sciences of horticultural area. As an international journal, HST is published in English and Korean, bimonthly on the last day of even number months, and indexed in ‘SCIE’, ‘SCOPUS’ and ‘CABI’. The HST is devoted for the publication of technical and academic papers and review articles on such arears as cultivation physiology, protected horticulture, postharvest technology, genetics and breeding, tissue culture and biotechnology, and other related to vegetables, fruit, ornamental, and herbal plants.
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