Germination Flashcards
What is germination 🤨?
Germination is the development of a plant from a seed after a period of dormancy.
What are seeds formally formed from? 🤨
Fertilized ovules (the seeds are typically dispersed far away from parent plants to reduce competition)
The seed contains an _____________ and a nutrient storage called an ___________.
The seed contains an embryonic plant and a nutrient storage called an endosperm.
What does the endosperm contain 😒?
It would contain carbohydrates and oils as energy reserves, and proteins for growth.
What does the testa or seed coat do? 🙆
It protects the embryo from mechanical damage.
Eventually it absorbs water and ruptures to allow germination to take place.
The _____________, ____________ and then the ___________, ___________ emerge from the micropyle.
The rudimentary root, radical, and then the rudimentary shoot, plumule, emergency from the micropyle.
What is the hilum?
It is the scar of the seed which was the point attached to the seed vessel.
The difference between an embryonic plant and an embryonic human (1)
The embryonic human is still attached to the parent while the embryonic plant is in a seed separate from the parent.
The difference between an embryonic plant and an embryonic human (2)
The embryonic human obtains nutrition from a placenta while the plants from the endosperm.
The difference between an embryonic plant and an embryonic human (3)
The embryonic plant can sustain itself right after germination while the embryonic human requires nutrients from its mother after it is born.
What’s a cotyledons?
Cotyledons are small, rudimentary leaves that assist with photosynthesis in the early stages of plant growth (help the plant to produce glucose and starch) before the true leaves develop after that the cotyledon is shedded.
Germination is triggered by?🙋
Warmth
The presence of moisture
The presence of oxygen
What are the parts of a seed. (research diagram online since app does not allow images🙆💖)
Visualise the shape of the seed, it’s shaped like a kidney bean, the outer layer is known as the testa or seed coat, within the testa there is that big area called the cotyledon then a rudimentary root (radicle) which looks like a long tube leading to the rudimentary shoot (plumule ploo/me/ule) which is the top with the leaves, (leading down from the plumule are the epicotyl then the hypocotyl the radical) that whole section will emerge from the micropyle (area between the testa and radicle) the hilum is the tiny seed looking thing
What is NOT 🙅 needed for germination to take place?
☀️SUNLIGHT ⁉️ remember that!
