Table of Contents
- 1 What are the process involved in seed germination?
- 2 Which enzymes are active during germination of a seed?
- 3 When seeds become metabolically active and start to grow it is referred to as?
- 4 What are the 3 general stages of seed germination?
- 5 How is amylase used in germination?
- 6 How do germinating seeds respire?
- 7 What are the metabolic processes during seed germination?
- 8 Where does DNA methylation occur during seed development?
- 9 What are the phases of the germination process?
What are the process involved in seed germination?
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.
Which enzymes are active during germination of a seed?
Enzymes such as amylase, protease, and lipase are liable for solubilizing spare food material in the form of starch, protein and lipid correspondingly in seed and deliver energy and other fundamentals food material to germinating embryo.
What is produced by the germinating seeds during activity?
The germinating seeds in the conical flask release CO2 during respiration, which is absorbed by the KOH solution kept in the small test tube. This creates a partial vacuum in the flask that forces the water up the delivery tube. Thus, it proves that germinating seeds produce carbon dioxide during respiration.
When seeds become metabolically active and start to grow it is referred to as?
Germination is usually the growth of a plant contained within a seed; it results in the formation of the seedling. It is also the process of reactivation of metabolic machinery of the seed resulting in the emergence of radicle and plumule.
What are the 3 general stages of seed germination?
In general, germination process can be distinguished into three phases: phase I, rapid water imbibition by seed; phase II, reactivation of metabolism; and phase III, radicle protrusion [6].
Do seeds have metabolism?
As seeds imbibe water, metabolic processes initiate with an increase in respiration rate [7]. Seeds store mineral nutrients as sucrose or amino acids which are synthesized into starch or proteins during development to be used in early seedling emergence.
How is amylase used in germination?
Amylase is an enzyme found in the germinating seeds. Amylase enzyme breaks down starch into maltose, a chain of two glucose molecules Maltose then breaks down into glucose. Glucose is used for the growth of plumule and radicle. When this process happens, the seeds are said to undergo germination process.
How do germinating seeds respire?
Seeds don’t breathe in the same way mammals do. Instead, they breathe at a cellular level. In cellular respiration, the seed uses stored sugars, water and oxygen to burn energy at a cellular level and germinate, or sprout.
How do you show experimentally that carbon dioxide is given out during respiration?
Answer: KOH solution absorbs the CO2 released during respiration of seeds, which creates a partial vacuum in the conical flask, causing the rise in the water level of the U-shaped delivery tube. Rise in the level of water shows that CO2 is released during respiration.
What are the metabolic processes during seed germination?
Seed imbibition triggered many metabolic processes such as activation or freshly synthesis of hydrolytic enzymes which resulted in hydrolysis of stored starch, lipid, protein hemicellulose, polyphosphates and other storage materials into simple available form for embryo uptake.
Where does DNA methylation occur during seed development?
These dynamic changes in methylation mainly occur within transposable elements. Active DNA methylation during seed development depends on both RNA-directed DNA methylation and heterochromatin formation pathways, whereas global demethylation during germination occurs in a passive manner.
What is role of hydrolytic enzymes in seed germination?
The role of hydrolytic enzymes in seed germination and phosphate act as energy source and carbon skeleton [ 33 ]. Seed imbibition triggered many other storage materials into simple available form for embryo uptake. Also, consumption of involved in the Krebs cycle and electron transport chain [ 34, 35].
What are the phases of the germination process?
In general, germination process can be distinguished into three phases: phase I, rapid water imbibition by seed; phase II, reactivation of metabolism; and phase III, radicle protrusion [ 6 ].