Seed Quality Control

• Acclimatization: The gradual physiological adjustment and genetic adaptation of an introduced plant population or cultivar to new climatic and edaphic environmental conditions over successive generations under natural selection.
• Related Terms:
• Domestication: The bringing of wild species under human cultivation and artificial selection.
• Adaptation: An inherent evolutionary morphological or physiological attribute enhancing fitness in a given environment. (Correct answer: Option 2)

• Physical Seed Alteration Machines:
• Pelleting Machine: Applies inert filler materials (clay, diatomaceous earth) and binders to fundamentally enlarge irregular or tiny seeds into uniform spheres for precision mechanical planting.
• Burr Reducer: Mechanically shears off the outer rough corky burr of beet seed clusters, modifying outer dimensions.
• & D) Buckhorn and Polishing machines alter seed coatings and surface appendages.
• Conclusion: Machines (A), (B), (C), and (D) all modify physical seed dimensions and surface properties. (Correct answer: Option 4)

• Assertion (A) is True: When seed moisture content exceeds approximately $14\%$, free water becomes available in cells, initiating heightened cellular metabolic respiration, mitochondrial electron leakage, enzymatic lipid peroxidation, and free radical generation, which sharply accelerates seed deterioration.
• Reason (R) is False: At higher moisture levels ($\gt 14\%$), oxidative enzymes such as lipoxygenases, lipases, and peroxidases are activated, not inactivated; active lipoxygenases catalyze the oxygenation of polyunsaturated fatty acids, compounding oxidative degradation.
• Conclusion: (A) is true but (R) is false (Option 3).

Correct option: (3) (A) is true but (R) is false