BiotechPushan · Class 9-10
Totipotency: har cell mein poora paudha chhupa hai
Paudhe ka ek chhota tukda poora naya paudha kaise ban jaata hai?
Socho pehle… phir dekho jawab
Kyunki paudhe ki har living cell mein poora paudha banane ki jaankari (genetic information) chhupi hoti hai — is khoobi ko 'totipotency' kehte hain. Sahi conditions milte hi cell dobara poora paudha bana sakta hai.
Mechanism: explant ko sterile lab mein rakha jaata hai, ek nutrient medium mein jismein sugar, minerals aur growth hormones hote hain. Yeh hormones cell ko pehle ek undifferentiated cell mass (callus) banane, phir usse jaden-patte-tana banane ke liye signal dete hain.
Term: totipotency — ek cell ki poora naya paudha banane ki taakat. Explant, callus, plantlet — yeh sab tissue culture ke basic terms hain.
So what: isse disease-free, genetically identical (clone) paudhe bade paimane par, kam samay mein bante hain — kisano aur nurseries dono ko fayda hota hai, khaaskar un crops mein jo seed se aasani se nahi ugte.
Ghar pe try karo
Ek flowchart banao: Explant → Sterilise → Nutrient medium + hormones → Callus → Plantlets → Mitti mein shift. Har step ke saamne ek line likho ki wahan kya ho raha hai.
Wow!
Sirf ek accha paudha chun kar, scientist usse lakhon identical copies mein badal sakte hain — bina ek bhi seed ke!
3 sawaal
- Totipotency ka matlab kya hai?
Jawab dekho
Ek cell ki poora naya paudha banane ki taakat. Totipotency ek cell mein chhupi poora naya organism banane ki genetic potential hai.
- Callus kya hai?
Jawab dekho
Ek undifferentiated cell mass jo explant se banta hai. Callus explant se banne wala undifferentiated cell mass hai, jo baad mein poora paudha banta hai.
- Tissue culture se banaye paudhe ka bada fayda kya hai?
Jawab dekho
Genetically identical, disease-free, bade paimane par jaldi banna. Isse disease-free, ek-jaise paudhe bade paimane par kam samay mein bante hain.
NCERT se jodo: NCERT Class 9/10 Science — improvement in food resources; tissue culture ka zikr