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Using well labeled diagrams,describe the process of germination in a bean plant up to when the first stage foliage leaves become functional.

      

Using well labeled diagrams,describe the process of germination in a bean plant up to when the first stage foliage leaves become functional.

  

Answers


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Germination Stage
Germination refers to the seed as it begins to sprout. Bean seeds germinate, or sprout, when water dissolves or cracks open the hard casing around the seed or embryo. Warmth speeds the process along. The bean will send out a tiny (embryonic) root called a radicle.

Casing Split and Root Growth
After the casing splits, the first thing to emerge from the bean seeds are the roots. Slowly, roots unfurl from the seed, reaching out for moisture and nutrients. Roots look like white threads as they grow out from the bean seed.

Amend Soil During Germination
Like all vegetables, beans need nutrient-rich soil. When starting a vegetable garden, it is essential to amend the soil and continually replenish its nutrients. Planting bean seeds in good garden soil amended with compost helps the roots find available nutrients immediately. As the roots descend, they pull water and nutrients from the soil into the seed itself. Slowly, the seed receives what it needs to enter the next stage of its life cycle: leaf growth.

Leaf Growth
After the seed germinates and the roots grow, the bean plant begins to push out a single stem. As the stem emerges from the soil, two little leaves emerge. The first leaves to emerge from a bean plant do not look like the typical bean plant leaves. They're rounded, and help the plant grow quickly into a strong, mature plant.

These leaves (also termed cotyledons) emerge above the ground, as opposed to below the soil surface which is common in other plants, and are connected to the seed.
A stalk (hypocotyl) sets the seed and cotyledons firmly into the soil.
The first pair of leaves provide photosynthesis for the seedling. They drop off as soon as the mature leaves are produced.

Flowering Cycle
The end of the bean plant's life cycle is flowering. Flowers are the reproductive portion of the plant, and plants begin reproducing as soon as they are able to do so. The time is takes a bean plant to flower varies according to the types of bean, but generally within six to eight weeks of germination you'll begin to see flowers on the bean plant. As the flowers are pollinated or fertilized, seed pods develop.

JohnCooper answered the question on January 5, 2021 at 12:49

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