Which of the following groups of seeds represents the orthodox class of seeds?
निम्नलिखित में से बीजों का कौन सा समूह रूढ़िवादी (orthodox) वर्ग के बीजों का प्रतिनिधित्व करता है?
Seed Storage Behavior:
- Orthodox Seeds:
- Can tolerate drying to very low moisture content (less than 5%) and survive freezing temperatures (down to $-20^\circ\text{C}$ or liquid nitrogen).
- Their longevity increases with decreasing seed moisture and storage temperature.
- Examples: Rice, Wheat, Chickpea, Maize, Mustard, Tomato, and most agricultural field crops.
- Recalcitrant Seeds:
- Seeds that lose viability when dried below a relatively high critical moisture content (typically 12–30%) and cannot tolerate freezing temperatures.
- Examples: Mango, Coconut, Rubber, Cocoa, Jackfruit, Citrus.
- Intermediate Seeds: Coffee, Oilpalm, Papaya.
Therefore, Rice and Wheat represent orthodox seeds.
Correct Answer: Option 3 (Rice and Wheat).
विस्तृत व्याख्या:
Seed Storage Behavior (बीज भंडारण व्यवहार - Roberts, 1973):
- Orthodox Seeds (ऑर्थोडॉक्स/रूढ़िवादी बीज):
- Can tolerate drying to very low moisture content (less than 5%) and survive freezing temperatures (down to $-20^\circ\text{C}$ or liquid nitrogen).
- Their longevity increases with decreasing seed moisture and storage temperature.
- Examples: Rice (धान), Wheat (गेहूँ), Chickpea, Maize, Mustard, Tomato, and most agricultural field crops.
- Recalcitrant Seeds (रिकैलसिट्रेंट/अहठी बीज):
- Seeds that lose viability when dried below a relatively high critical moisture content (typically 12–30%) and cannot tolerate freezing temperatures.
- Examples: Mango (आम), Coconut (नारियल), Rubber (रबर), Cocoa (कोको), Jackfruit, Citrus.
- Intermediate Seeds: Coffee, Oilpalm, Papaya.
Therefore, Rice and Wheat represent orthodox seeds.
Correct Answer: Option 3 (Rice and Wheat).
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