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Heliotropism, a form of tropism, is the diurnal or seasonal motion of plant parts (flowers or leaves) in response to the direction of the Sun. The habit of some plants to move in the direction of the Sun, a form of tropism, was already known by the Ancient Greeks. They named one of those plants after that property Heliotropium, meaning "sun turn".
Tulip bulbs are typically planted around late summer and fall, in well-drained soils. Tulips should be planted 10 to 15 cm (4 to 6 inches) apart from each other. The recommended hole depth is 10 to 20 cm (4 to 8 inches) deep and is measured from the top of the bulb to the surface. Therefore, larger tulip bulbs would require deeper holes.
The phase of the Moon does not influence fertility, cause a fluctuation in crime, or affect the stock market. There is no correlation between the lunar cycle and human biology or behavior. However, the increased amount of illumination during the full moon may account for increased epileptic episodes, motorcycle accidents, or sleep disorders. [464]
Pollination often occurs within a species. When pollination occurs between species, it can produce hybrid offspring in nature and in plant breeding work. In angiosperms, after the pollen grain (gametophyte) has landed on the stigma, it germinates and develops a pollen tube which grows down the style until it reaches an ovary.
Anthecology, or pollination biology, is the study of pollination as well as the relationships between flowers and their pollinators. [1]: 8 Floral biology is a bigger field that includes these studies. Most flowering plants, or angiosperms, are pollinated by animals, and especially by insects. [2]
Pollination by a specialist can result in high flowering synchrony, as asynchronous flowering can result in erratic attraction of a specialist to a site. [19] Showy floral displays tend to attract pollinators, [ 20 ] [ 21 ] and synchronous flowering can attract more pollinators to a population.
It is hypothesized that thermonastic movement is an adaptation for photoprotection, as harsh freezing conditions make leaves more susceptible to light damage from the sun. [4] In flowers it may instead serve as a signal for flower opening and closing with rising and falling temperatures. [ 2 ]
Tulipa sylvestris - MHNT. Tulipa sylvestris, the wild tulip [3] or woodland tulip, [4] is a Eurasian and North African species of wild tulip, a plant in the lily family.Its native range extends from Portugal and Morocco to western China, covering most of the Mediterranean and Black Sea Basins, and Central Asia.