Q92: 'Ti Plasmid' is associated with which disease? - Cell Biology, Genetics, Physiology, Biochemistry & Plant Protection - ICAR AIEEA PG 2024 - Plant Sciences | Agrigyan

विस्तृत व्याख्या:

Tumor-Inducing (Ti) Plasmid (टीआई प्लास्मिड):

• The Ti (Tumor-inducing) plasmid is a large circular extrachromosomal plasmid found in the soil bacterium Agrobacterium tumefaciens.
• It is the etiological determinant of Crown gall disease (क्राउन गॉल रोग), an oncogenic plant disease affecting hundreds of dicotyledonous species.
• During infection, the T-DNA (transferred DNA) region of the Ti plasmid is stably transferred and integrated into the host plant nuclear genome, directing host cells to overproduce phytohormones (auxin and cytokinin) resulting in autonomous crown gall tumor proliferation.

Correct Answer: Option 1 (Crown gall).