Classify plant mineral nutrients based on biochemical functions. How do excess minerals in the soil limit the plant growth?
Plant mineral nutrients can be classified based on their biochemical functions:
-
Group 1: Constituent of Carbon Compounds: Nitrogen (N), Sulfur (S). Essential for amino acids, proteins, nucleic acids.
-
Group 2: Energy Storage and Structural Integrity: Phosphorus (P), Boron (B), Silicon (Si). Involved in ATP, phospholipids, cell walls.
-
Group 3: Ionic Form, Osmotic Regulation, Enzyme Cofactors: Potassium (K), Calcium (Ca), Magnesium (Mg), Chlorine (Cl), Sodium (Na), Manganese (Mn). Regulate stomata, activate enzymes, maintain cell turgor.
-
Group 4: Redox Reactions and Electron Transfer: Iron (Fe), Copper (Cu), Zinc (Zn), Molybdenum (Mo), Nickel (Ni). Crucial for photosynthesis, respiration.
Excess minerals in the soil limit plant growth primarily through:
-
Toxicity: High concentrations of certain minerals (e.g., aluminum, manganese, boron) can directly poison plant cells, causing visible damage like chlorosis, necrosis, or stunted root growth.
-
Nutrient Imbalance/Antagonism: Excess of one nutrient can interfere with the uptake or utilization of other essential nutrients. For example, high phosphorus can induce zinc deficiency.
-
Osmotic Stress: High salt concentrations (e.g., sodium, chloride) increase the osmotic potential of the soil solution, making it difficult for roots to absorb water, leading to physiological drought and reduced turgor.
Answered By:
Sarvesh Jha
Sarvesh Jha is a seasoned government exam mentor with firsthand success in top exams like IBPS PO, SBI PO, CDS, RRB JE, SSC CGL, BPSC, and CTET. Known for his deep conceptual clarity and strategic approach, he has guided over 5000 students through personalized mentorship. He has been creating well researched content for last 5 years.
Similar Questions
Briefly discuss significant features of heterosis and explain the dominance and overdominance hypotheses of heterosis, giving their main features.
Define Marker-Assisted Selection and give suitable examples. Discuss the applications of marker-assisted selection in recurrent selection, gene pyramiding and QTL introgression.
Define 'Grow-out test'. Explain briefly the methods of roguing in seed fields.
Define cell cycle. Describe different types and phases of cell cycle.
Explain mutagenesis with its classification. Discuss briefly the mechanisms of action of alkylating agents and azide mutagens in crop improvement.
What do you mean by Intellectual Property? Discuss the protection of Intellectual Property Rights in reference to patent, plant breeders' rights and copyright.
Why do fruit plants need to be propagated vegetatively? Explain the advantages and disadvantages of asexual and sexual propagation.
Give an account on double haploid and its applications in plant breeding. Also discuss the production methods of haploid.
Explain the functions of plant cell wall in growth, development, maintenance and reproduction of plants.
Define genetic purity. How can the maintenance of genetic purity of varieties be done outside their normal cultivation area?
Important Questions from Miscellaneous
Write a note in 150 words
Mendelian and non-Mendelian traits.Write a note in 150 words
Theoretical significance of Purum kinship-system.Write a note in 150 words
Smell as a signal among non-human primates.Write a note in 150 words
Osteodontokeratik culture and its makers.Discuss the Miocene hominoid remains and their significance in evolution.
