Seeds typically do not require sunlight for germination because most of their nutritional needs for the germination phase of a plant's life are contained within the seed itself. Conversely, some seeds do require light to germinate. Although this is atypical, such seeds mustn't be buried in soil.Know More
During the germination phase, most plants require three basic factors in order to get started: proper soil pH, moisture and a temperature that's appropriate to the specific plant's requirements. The correct temperature for most plants falls somewhere between 40 and 104 degrees Fahrenheit.
When seeds that require darkness for germination have issues sprouting, small, occasional exposure to white light can stimulate the seed to the point of germination, although this does not work in all instances.
The typical rule of thumb in regard to a plant requiring sunlight to germinate is the smaller the seed, the more likely it is to need light. Such seeds should be placed on top of the soil in order to collect sunlight to stimulate germination.
Some plants have even more specific light requirements during germination. The Grand Rapids variety of lettuce, for example, is only stimulated to germination by red light at a wavelength of about 660 nanometres.Learn more in Botany
The seed germination process is a complex process in which the embryonic plant created by sexual reproduction of plants propagates the species by forming a new, independent plant. In order to germinate, the moisture and temperatures must be right. New plants live a short while on the sugars stored in the seed, requiring the plant to start gathering nutrients and moisture from the soil and producing its own food quickly.Full Answer >
In hypogeal germination, cotyledons remain inside the seed shell, beneath the ground and non-photosynthetic, while in epigeal germination, the cotyledons expand to split the seed coat, allowing the sprout to push them above the ground where they become photosynthetic, according to Reference.com. Epigeal germination allows the young plants to begin providing food quickly as the cotyledons have little food stored to provide for their needs.Full Answer >
Coconut seeds require moisture and warmth to germinate. They are tolerant to the salinity of sea water, but do not tolerate temperatures below freezing. For optimal growth, the coconut tree requires temperatures above 72 degrees and high humidity.Full Answer >
Adaptations of plants living in estuaries include the ability to survive in water of varying salinity levels, cells that store oxygen for use underwater, and the ability to reproduce by releasing new plants ready to germinate. These adaptations are in response to the variable conditions of estuaries.Full Answer >