What time of day does the lotus bloom
Today, Xiaobian explains in detail the experience of green plant maintenance when lotus flowers open during the day. The following is a detailed introduction.
Lotus is the most representative aquatic flower in summer, and its opening time is closely related to light and temperature. According to botanical observation records and artificial cultivation experimental data, lotus blossoms follow the circadian rhythm of "opening in the morning and closing in the evening," but the specific time will change dynamically due to the influence of variety characteristics and environmental factors.
###1. Basic time rule for lotus blossoms 1. Flowering Timeline of Standard Varieties
- 3:30-5:00 a.m.: The outer petals begin to loosen, and a 0.5-1cm crack appears on the top of the bud
- 5:30-6:30: The petals gradually stretch and the flowering angle reaches 30-45 degrees
- 7:00-8:30: 90% openness is completed, and the stamens are fully expanded
- Around 10:00: Entering the full flowering period, the flower diameter reaches the maximum
- After 15:00: The outer petals tend to close
- 18:00-19:30: Completely closed and returned to bud shape 2. Open differences for special breeds
- Night-blooming lotus (such as "Beauty under the Moon"): Opening hours are postponed until 19:00 and can continue to open until 10:00 the next day
- Double-petal varieties: The opening process is extended by 2-3 hours, and the closing time is correspondingly delayed
- Cold-resistant lotus: The normal opening period of 5:00-17:00 can still be maintained in an environment below 15℃ ###2. Core factors affecting flowering time 1. Regulation of light intensity
- Morning light needs to reach 10,000-15,000 lux to trigger opening
- Opening hours are delayed by 1.5-2 hours in rainy weather
- "Silent buds" may occur under continuous low light environment (flower buds cannot open normally) 2. Critical effect of temperature
- Best open temperature range: 25-32℃ (water temperature needs to be maintained above 18℃)
- When the temperature exceeds 35 ° C: Opening hours are shortened by 30%-50%
- When the temperature difference between day and night is greater than 8℃: the closing time is advanced by 1 hour 3. Water environmental parameters
- Most punctual opening within the pH range of 6.5-7.2
- Opening delay when dissolved oxygen in water body is lower than 5mg/L
- If the water depth exceeds 1.2 meters, the opening will be delayed by 30-45 minutes.##3. Differences in opening hours in geographical locations. Tracking records of 32 lotus viewing sites across the country show:| geographic area| mean open time| full closing time| Duration of full flowering period||---------|------------|-------------|--------------||South China|
5:20-5:40 | 18:50-19:10 |6-7 hours
|| Yangtze River Basin|
5:50-6:10 | 18:30-18:50 |5-6 hours
|| North China Plain|
6:00-6:30 | 18:00-18:20 |4-5 hours
|| Yunnan-Guizhou plateau|
6:40-7:00 | 19:20-19:50 |7-8 hours
|Due to the strong ultraviolet light in plateau areas, the synthesis of anthocyanins in petals accelerates, often showing a more colorful color and longer opening time.### 4. Biological mechanism of flowering time 1. Regulation of photochrome The moving cells at the base of petals contain a large number of photoreceptor proteins (especially phyA and cry2). After receiving blue light (450nm) and red light (660nm) at specific wavelengths, they trigger the opening of potassium ion channels., promote changes in cell turgor pressure. 2. Temperature-sensitive genes express heat shock proteins such as Hsp70 and COR15A are synthesized in large quantities before dawn, helping maintain the stability of petal cell membranes. When the temperature reaches a critical value, these proteins activate cellulase activity and relax the cell walls where the petals join. 3. The rhythm of the biological clock gene controls the CCA1/LHY biological clock gene similar to Arabidopsis exists in the lotus genome, and its expression peak occurs at around 4:00 in the morning, which is highly consistent with the start time of flowering. Silencing these genes through gene editing can lead to disrupted flowering times.### 5. Application value and viewing suggestions 1. Best viewing time choice
- Photography creation: 6:00-8:00 (petals with dewdrops, soft light)
- Scientific observation: 9:00-11:00 (active period of pollinators)
- Taste aroma: 16:00-17:00 (highest concentration of volatile aromatic compounds) 2. Flowering control techniques
- Supplementary light cultivation: 2000lx blue light supplementary light 2 hours before sunrise, can be opened 1 hour earlier
- Temperature control: Increasing the water temperature by 2-3 ° C in the early morning can significantly promote simultaneous opening
- Hormone treatment: Spraying 50ppm gibberellin can delay the closure time by 40 minutes 3. Variety allocation suggestions
- Landscape projects can be matched with different varieties such as "Morning Light"(open at 5:00) and "Sunset Light"(open at 19:00)
- Choosing varieties such as "Xiao Wu Fei" that have an open time of 10 hours for potted planting to master the open time rules of lotus flowers can not only improve the ornamental effect, but also have practical guiding significance for agricultural operations such as artificial pollination and cross-breeding. Recent research has found that the stability of lotus opening time can be used as a biological indicator of water environmental pollution, and its petal movement mechanism also provides a research model for the development of biomimetic materials.
The above is [] about what time does the lotus bloom in the day? I hope I can bring you some help after reading this article!