Growth regulation and off-season flowering through night breaks in Chrysanthemum morifolium Ramat cv. Anmol

Thakur, Tanya; Grewal, H. S.

doi:10.3329/bjb.v48i2.47684

Cited by 4 publications

(4 citation statements)

References 11 publications

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“…For Chrysanthemum morifolium, the period between the start of the SD period and flowering under optimal conditions (reaction time) can vary between 6~11 weeks (Thakur and Grewal, 2019). Based on Park and Jeong (2020), 41-days of photoperiodic B light treatment duration was enough for observing the changes in chrysanthemum photoperiodic flowering.…”

Section: Measurements Of Growth Parametersmentioning

confidence: 99%

The flowering of SDP chrysanthemum in response to intensity of supplemental or night-interruptional blue light is modulated by both photosynthetic carbon assimilation and photoreceptor-mediated regulation

2022

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The photoreceptor-mediated photoperiodic sensitivity determines the obligate short-day flowering in chrysanthemum (Chrysanthemum morifolium Ramat.) when the night length is longer than a critical minimum, otherwise, flowering is effectively inhibited. The reversal of this inhibition by subsequent exposure to a short period of supplemental (S) or night-interruptional (NI) blue (B) light (S-B; NI-B) indicates the involvement of B light-received photoreceptors in the flowering response. Flowering is mainly powered by sugars produced through photosynthetic carbon assimilation. Thus, the light intensity can be involved in flowering regulation by affecting photosynthesis. Here, it is elucidated that the intensity of S-B or NI-B in photoperiodic flowering regulation of chrysanthemums by applying 4-h of S-B or NI-B with either 0, 10, 20, 30, or 40 mmol•m −2 •s −1 photosynthetic photon flux density (PPFD) in a 10-h short-day (SD10) [SD10 + 4B or + NI-4B (0, 10, 20, 30, or 40)] or 13-h long-day (LD13) condition [LD13 + 4B or + NI-4B (0, 10, 20, 30, or 40)] provided by 300 ± 5 mmol•m −2 •s −1 PPFD white (W) LEDs. After 60 days of photoperiodic light treatments other than the LD13 and LD13 + NI-4B (40), flowering with varying degrees was observed, although the SD10 gave the earliest flowering. And the LD13 + 4B (30) produced the greatest number of flowers. The flowering pattern in response to the intensity of S-B or NI-B was consistent as it was gradually promoted from 10 to 30 mmol m −2 s −1 PPFD and inhibited by 40B regardless of the photoperiod. In SD conditions, the same intensity of S-B and NI-B did not significantly affect flowering, while differential flowering inhibition was observed with any intensity of NI-B in LDs. Furthermore, the 30 mmol•m −2 •s −1 PPFD of S-B or NI-B up-regulated the expression of floral meristem identity or florigen genes, as well as the chlorophyll content, photosynthetic efficiency, Frontiers in Plant Science frontiersin.org 01

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Section: Measurements Of Growth Parametersmentioning

confidence: 99%

The flowering of SDP chrysanthemum in response to intensity of supplemental or night-interruptional blue light is modulated by both photosynthetic carbon assimilation and photoreceptor-mediated regulation

2022

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“…Thakur and Grewal [6] investigated the utilization of photoperiodic night interruption to optimize the timing of flowering in Chrysanthemum cultivar Anmol, aiming to synchronize it with the market demand. The effect of six-night interruption treatments (i.e., control, <5 second flash, 30, 60, 90, 120 min) were monitored.…”

Section: Creating Artificial Long Daysmentioning

confidence: 99%

Flower Forcing: A Review

Hasna,

Rafeekher,

Priyakumari

et al. 2024

Int. J. Plant Soil Sci.

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In the modern floricultural industry, scheduling plant production is essential due to fluctuating market demands. Flower forcing, which stimulates flowering at specific dates or during off-season periods, is a key technique employed. The manipulated flowering dates resulting from flower forcing may deviate from the plant's natural schedule, occurring either earlier or later than the standard flowering dates. This can be achieved by adjusting factors affecting flowering such as temperature, photoperiod, and irradiance etc. Implementation of special practices like pruning, leaf trimming, dormancy breaking helps in forcing operation in certain plants. Utilization of chemicals such as plant hormones like gibberellin and ethylene, growth retardants and some fertilizers also play an important role in forcing. Employing mechanical methods can be considered as a sustainable and environment friendly practice. Advancements in plant physiology, photomorphogenesis, metabolism, and greenhouse technologies have led to the development of multiple strategies to finely regulate the rate of plant growth and development across various crops.

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“…Chrysanthemum plants are short-day ornamental plants that will flower if the night is longer than the minimum length of the critical point (Huang et al, 2021). According to Thakur & Grewal (2019), the tipping point of chrysanthemum plants is 13.5 hours. Widyastuti & Dewi (2018) added, to optimize their vegetative growth, chrysanthemum plants require sun irradiation for 16 hours a day, while the length of irradiation in Indonesia only ranges from 12 hours a day, so additional irradiation is needed for 4 hours.…”

Section: Figure 7 Effect Of Planting Media Variations On Flower Initi...mentioning

confidence: 99%

Studying Chrysan’s Growth and Outcome on Planting Media’s Variation and Leave Manure

Yusuf

Suparto

Wiyantono

2022

ISS

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Chrysanthemum is a strategic floriculture commodity to be developed. The growth and production of flowers is influenced by many factors including growing media and fertilization. This study aims to examine the effect of variations in planting media and concentrations of foliar fertilizer on the growth and yield of chrysanthemum. The study was conducted in a Completely Randomized Block Design with three replications. Treatment of planting media consisted of cow manure: husk charcoal: bamboo leaf humus (1:1:1), cow manure: husk charcoal: cocopeat (1:1:1), and cow manure: husk charcoal. : wood sawdust compost (1:1:1). Treatment of foliar fertilizer concentrations consisted of control (0 g/l); 2 g/l; 4 g/l; and 6 g/l. The data obtained were analyzed using the F test, if there was a significant variation, then proceed with the DMRT test at ? 5%. The results showed that the planting media treatment of cow manure: husk charcoal: bamboo leaf humus, had a better effect than other media, indicated by the variables of plant height, crown diameter, stem diameter, number of branches, number of flowers, flower diameter, flower initiation time, flower coloring time, and harvest time. The application of foliar fertilizer with doses of 6 g/l, 4 g/l, and 2 g/l gave higher yields of flowers than the control. A good combination treatment for flower yields was found in the combination of cow manure: husk charcoal: bamboo leaf humus planting media and leaf fertilizer concentration of 4 g/l which produced the highest number of flowers, while for growth was the combination of cow manure : husk charcoal: bamboo leaf humus planting media and leaf fertilizer concentration 2 g/l; cow manure: husk charcoal: cocopeat and leaf fertilizer concentration of 4 g/l; as well as cow manure: husk charcoal: cocopeat and the concentration of foliar fertilizer 6 g/l which gave the higher number of leaves.

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Growth regulation and off-season flowering through night breaks in Chrysanthemum morifolium Ramat cv. Anmol

Cited by 4 publications

References 11 publications

The flowering of SDP chrysanthemum in response to intensity of supplemental or night-interruptional blue light is modulated by both photosynthetic carbon assimilation and photoreceptor-mediated regulation

The flowering of SDP chrysanthemum in response to intensity of supplemental or night-interruptional blue light is modulated by both photosynthetic carbon assimilation and photoreceptor-mediated regulation

Flower Forcing: A Review

Studying Chrysan’s Growth and Outcome on Planting Media’s Variation and Leave Manure

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