Which of the following are generally sensitive to touch and help plants in climbing?
Which of the following are generally sensitive to touch and help plants in climbing?
निम्नलिखित में से क्या सामान्यतः स्पर्श के प्रति संवेदनशील होते हैं तथा पौधों को ऊपर चढ़ने में सहायता करते हैं?
Detailed Solution & Logic
Tendrils/ प्रतान
📘 Explanation
Tendrils are thin, thread-like structures found in some climbing plants. They are sensitive to touch and help plants climb by coiling around nearby support such as sticks, wires, or other plants.
When a tendril touches an object, it responds to the stimulus of touch and curls around the support. This movement is called thigmotropism (growth response to touch).
Therefore, tendrils help plants climb and grow upward toward sunlight.
🌟 Extra Facts
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The phenomenon in which plants respond to touch is called Thigmotropism.
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Tendrils are commonly seen in plants like Pea plant, Cucumber plant, and Grapevine.
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Tendrils may develop from modified stems or modified leaves depending on the plant species.
📗 व्याख्या
प्रतान (Tendrils) पतली, धागे जैसी संरचनाएँ होती हैं जो कुछ लता या बेल वाले पौधों में पाई जाती हैं। ये स्पर्श के प्रति संवेदनशील (touch sensitive) होती हैं और पौधों को सहारे के चारों ओर लिपटकर ऊपर चढ़ने में मदद करती हैं।
जब प्रतान किसी वस्तु को छूती है, तो वह उसके चारों ओर कुंडली बना लेती है। इस प्रकार की प्रतिक्रिया को स्पर्शानुवर्तन (Thigmotropism) कहते हैं।
इसलिए प्रतान पौधों को सहारे के साथ ऊपर चढ़ने और सूर्य के प्रकाश तक पहुँचने में मदद करती हैं।
🌟 अतिरिक्त तथ्य
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पौधों की स्पर्श के प्रति प्रतिक्रिया को Thigmotropism कहा जाता है।
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प्रतान Pea plant, Cucumber plant और Grapevine जैसे पौधों में पाई जाती हैं।
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कुछ पौधों में प्रतान संशोधित तना (modified stem) होती हैं और कुछ में संशोधित पत्ती (modified leaf) होती हैं।
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