What's the first organ that emerges from a germinating seed? What's the origin of thie structure?
That depends on the seed, but for most seeds it is the radicle or seed root but for some plants the first organ to germinate is the plumule or shoot. The radicle is an apical root, which for most plants forms a taproot, which shows strong apical dominance. As the young plant grows, most lose the tap root and develop a fibrous root system which does not have as strong of a dominant apical root.
What does germination mean?
When a seed starts to grow. 'Germinate' comes from 'germ cell' or the cell from where the whole organism grows. So whenever the germ cell is activated and starts growing into the new organism, it is germination. It usually refers to when the baby root and stem start to push out from the seed capsule.
What occurs when the radical of the seed becomes the root and the hypocotyl becomes the stems and leaves?
b-in germination The radical, the hypocotyls and the plumule are found in most seeds. The radical is the first structure to appear from the seed. It is the root emerging and growing downward into the soil. The hypocotyl is part of the stem that will emerge from the seed and is located between the radical and the cotyledon. The plumule is the first bud of the germinating seed and is located at the top of the seedling.
A STUDY OF SEEDS AND FRUITS -questions are in the details box...?
What conclusion can be drawn from the addition of iodine to the endosperm of a corn kernel? Name two important structural differences between the bean and corn seeds Which part of the seedling first appears above the ground (in a germinating kernel of corn) Which part of the seedling first appears above the ground (in a germinating bean seed) Is it more important for the developing plant to establish their roots first or their stem first? Why? Fully describe what happens to the cotyledons of the germinating bean seed as it progresses to grow. When will the seedlings be able to make their own food? What do seedlings compete for as they grow? Why is it possible for seeds to be kept in packages for long periods of time and then germinate when placed in the ground? Why are seeds mistakenly thought to be dead? What conditions are necessary for the germinations of seeds? How is the germinating monocot seed supplied with food? Dicot seed?
What is the first organ to differentiate in rice and in corn?
When grass seeds — like corn, rice, oats, wheat etc. — germinate, * the primary root pierces the seed (and fruit) coverings and grows down; * the primary leaf of the plant grows up. It is protected as it pushes up through the soil by the coleoptile — a hollow, cylindrical structure. * Once the seedling has grown above the surface, the coleoptile stops growing and * the primary leaf pierces it. Early corn seedling growth is dependent on a strong root system. PRIMARY ROOTS. Corn plants like most annual grass plants produce two root systems. The first root system (primary) is composed of seven roots that all arise from within the seed. These roots anchor the seedling and sustain the seedling for the first couple of weeks after emergence. The main root system (secondary) of the corn plant is composed of numerous roots that originate from stem tissue. These adventitious roots are located at nodes along the stem, both below and above ground.