Question

Explain the five stage of germination​

Answer 1

Answer:

Such five changes or steps occurring during seed germination are: (1) Imbibition (2) Respiration (3) Effect of Light on Seed Germination(4) Mobilization of Reserves during Seed Germination and Role of Growth Regulators and (5) Development of Embryo Axis into Seedling.

Explanation:

(i) IMBIBITION:

The first step in the seed germination is imbibition i.e. absorption of water by the dry seed. Imbibition results in swelling of the seed as the cellular constituents get rehydrated. The swelling takes place with a great force. It ruptures the seed coats and enables the radicle to come out in the form of primary root.

RESPIRATION:

Imbibition of water causes the resumption of metabolic activity in the rehydrated seed. Initially their respiration may be anaerobic (due to the energy provided by glycolysis) but it soon becomes aerobic as oxygen begins entering the seed. The seeds of water plants, as also rice, can germinate under water by utilizing dissolved oxygen.

The seeds of plants adapted to life on land cannot germinate under water as they require more oxygen. Such seeds obtain the oxygen from the air contained in the soil. It is for this reason that most seeds are sown in the loose soil near the surface. Ploughing and hoeing aerate the soil and facilitate seed germination. Thus the seeds planted deeper in the soil in water-logged soils often fail to germinate due to insufficient oxygen .

(iii) Effect of Light on Seed Germination:

Plants vary greatly in response to light with respect to seed germination. The seeds which respond to light for their germination are named as photoblastic. Three categories of photoblastic seeds are recognized: Positive photoblastic, negative photoblastic and non-photoblastic. Positive photoblastic seeds (lettuce, tobacco, mistletoe, etc.) do not germinate in darkness but require exposure to sunlight (may be for a brief period) for germination.

SOO I COULD ONLY WRITE THIS MUCHH .....HOPE THIS HELPS U OUT ...... THANK UU

Answer 2

$\;\qquad\quad\;\;\large{\odot\;\;\underline{\underline{\bf{\red{Required\;Answer↷ }}}}}$

Such five changes or steps occurring during seed germination are: (1) Imbibition (2) Respiration (3) Effect of Light on Seed Germination(4) Mobilization of Reserves during Seed Germination and Role of Growth Regulators and (5) Development of Embryo Axis into Seedling.

$\;\qquad\quad\;\;\large{\odot\;\;\underline{\underline{\bf{\red{1st\;stage↷ }}}}}$

1.Imbibition:-

The first step in the seed germination is imbibition i.e. absorption of water by the dry seed. Imbibition results in swelling of the seed as the cellular constituents get rehydrated. The swelling takes place with a great force. It ruptures the seed coats and enables the radicle to come out in the form of primary root.

$\;\qquad\quad\;\;\large{\odot\;\;\underline{\underline{\bf{\red{2nd\;Stage↷ }}}}}$

2. Respiration:-

The main sprout emerges from the top of the plant in the second stage of growth. Wait until the second stage of growth when the main sprout emerges from the top of the plant. This sprout is called the hypocotyl and is the first sign of growth for plants planted in the soil.

$\;\qquad\quad\;\;\large{\odot\;\;\underline{\underline{\bf{\red{3rd\;stage↷ }}}}}$

3. Effect of Light on Seed:-

GerminationThe third stage is the resumption of growth: also called germination. The radicle is often the first part of the seedling to emerge from the seed. It will develop into the primary root from which root hairs and lateral roots develop. ... Seed viability can be extended under cool, dry storage conditions.

$\;\qquad\quad\;\;\large{\odot\;\;\underline{\underline{\bf{\red{4th\;Stage↷ }}}}}$

4. Mobilization of Reserves during Seed Germination and Role of Growth Regulators:-

Examine the sprouted seed to watch for the fourth stage of germination, which occurs when the the two cotyledons fall off and additional leaves appear on the bean plant.

$\;\qquad\quad\;\;\large{\odot\;\;\underline{\underline{\bf{\red{5th\;Stage↷ }}}}}$

5. Development of Embryo Axis into Seedling. :-

The embryonic axis consists of three parts: the plumule, the radicle, and the hypocotyl. The portion of the embryo between the cotyledon attachment point and the radicle is known as the hypocotyl. The embryonic axis terminates in a radicle, which is the region from which the root will develop.

$\large{\boxed{\mathcal{\overbrace{\underbrace{\fcolorbox{r}{red}{Hope It Helps. ♡★❥✌ }}}}}}$