Test: Mineral Nutrition - 3 - ACT MCQ

Presence of phosphorus can lead to retard in formation of protein in plants. Phosphorus is essential for growth and development of plant. It aids many processes such as photosynthesis, transmission of energy, membrane synthesis etc

Mineral salts enter the roots in very dilute solution so they can enter cell membrane and cell walls by osmosis. Because the solution is very dilute, it is easy for minerals to travel into the cells. These mineral salts are then carried throughout the plant.

Trace elements are elements that are required by the body but the required amount is less than 100 mg. Sodium, Potassium, sulfur, calcium, phosphorus, chlorine, and magnesium are trace elements.

Carbon is not a trace element. Chemical elements that have low concentration are called trace elements. Trace elements can be essential or non essential. Plants have around 45 percent carbon in them and carbon has high concentration.

Manganese toxicity is caused in plants that have high levels of superphosphate. It is common in plants fertilized by acidic fertilizers or when there is no proper source of nitrogen. Manganese toxicity can lead to deficiency of iron, calcium, as well as magnesium.

Nitrogen is essential for growth and development of plant. The plants get their green color due to presence of chlorophyll molecule in nitrogen. Nitrogen aids the process of photosynthesis and helps plants in creating food. Plant protoplasm is build by aid form nitrogen.

Plants needs essential elements for growth and development of their body. These elements also help the plant reproduce. Essential elements aid the germination of seed, proper growth of roots, leaves, branches, and stems. These nutrients are macronutrients and micronutrients.

Prototroph doesn’t require any organic nutrients to make their food and grow. They are self sufficient and can synthesize their food using organic nutrients. Nutrientional requirements of prototroph are similar to wild type. They can grow without aid from additional supplements.

The reason of green color of leaves is a pigment called chlorophyll. The plant cells have chlorophyll and it absorbs light from the atmosphere and gives leaves their green hue. Magnesium is the central component of chlorophyll. Absence of magnesium can lead to chlorosis of leaves.

Deficiency of phosphorus in plants can result in change in color of the leaves. The leaves turn dark green. This is because deficiency of phosphorus can lead to formation of carbohydrate in excess which turns the leaves dark green or even pale in some cases.

Zinc performs various functions in body of the plant. It aids the plant in creation of chlorophyll and various other carbohydrates. It also helps plant bear low temperatures by being in plant tissue. The process of conversion of starch to sugar is aided by zinc.

Aeroponics includes growing plants with roots that are exposed to air. Under this, the plants are grown without soil. Growing plants under aeroponics require more maintenance that normal plants. However, they don’t need much water.

Arnon and Stout proposed that plants require essential minerals. They put forward their research on essential elements in 1939. They also came up with certain criteria that make an element for the plant body.

An essential element is necessary for growth and development of the plant body. Such elements cannot be replaced by other elements as they have a very specific functions required by the plant. Essential elements have contribution in metabolic processes that take place in plant’s body.

Phytotron is used to grow plants in a controlled environment. It is a research greenhouse that is enclosed indoors. The purpose of phytotron is to research and study interactions between various plants and the surroundings. It comes under branches of botany and physiology.