KERALA PSC / BIOLOGY / PLANT NUTRITION / NOTES / OBJECTIVE QUESTIONS / STUDY MATERIALS / GENERAL KNOWLEDGE / KERALA PSC PRELIMINARY

 

KERALA PSC / BIOLOGY / PLANT NUTRITION / NOTES / OBJECTIVE QUESTIONS / STUDY MATERIALS / GENERAL KNOWLEDGE / KERALA PSC PRELIMINARY

KERALA PSC / BIOLOGY / PLANT NUTRITION / NOTES / OBJECTIVE QUESTIONS / STUDY MATERIALS / GENERAL KNOWLEDGE / KERALA PSC PRELIMINARY

·      Plant nutrition is the study of the nutrient elements that are necessary for growth.

·      There are 17 essential plant nutrients. Carbon and oxygen are absorbed from the air, while other nutrients including water are obtained from the soil.

 

MACRO NUTRIENTS

Carbon: Carbon forms the backbone of many plants biomolecules, including starches and cellulose. Carbon is fixed through photosynthesis from the carbon dioxide in the air and is a part of the carbohydrates that store energy in the plant.

Hydrogen: Hydrogen is necessary for building sugars and building the plant. It is obtained almost entirely from water.

Oxygen: Oxygen is necessary for cellular respiration. Cellular respiration is the process of generating energy-rich adeno-sine triphosphate (ATP)

Phosphorous: is important in plant bioenergetics

Potassium: regulates the opening and closing of the stomata by a potassium ion pump

Nitrogen: is an essential component of all proteins

Sulphur: is a structural component of some amino acids and vitamins, and is essential in the manufacturing of chloroplasts.

Calcium: regulates transport of other nutrients into the plant and is also involved in the activation of certain plant enzymes. Calcium deficiency results in stunting

Magnesium: is an important part of chlorophyll, a critical plant pigment important in photosynthesis.

 

MICRO NUTRIENTS

Iron: is necessary for photosynthesis and is present as an enzyme cofactor in plants. Iron deficiency can result in interveinal chlorosis and necrosis

Molybdenum: is a cofactor to enzymes important in building amino acids

Copper: is important for photosynthesis

Zinc: is required in a large number of enzymes and plays an essential role in DNA transcription.

In higher plants, Nickel is essential for activation of urease, an enzyme involved with nitrogen metabolism that is required to process urea.

Chlorine is necessary for osmosis and ionic balance; it also plays a role in photo-synthesis.

KERALA PSC / BIOLOGY / PLANT NUTRITION / NOTES / OBJECTIVE QUESTIONS / STUDY MATERIALS / GENERAL KNOWLEDGE / KERALA PSC PRELIMINARY