61.How do viroids move through plants? 62.How are viroids thought to exert their pathological effect on...
61.How do viroids move through plants?
62.How are viroids thought to exert their pathological effect on the host?
Homework Answers
61) viroids are simple nonencapsulated RNA molecule . They are considered as plant parasites. Viroids enter plant epidermis through cellwall . Later they enter either into the nucleus or chloroplast for replication . After replication they all get propagated to other cells or other plants .
There are lots of mechanisms to transport viroids .
Mechanical mode of transmission occurs by agricultural techniques through contaminated instruments . Transmission can also occur by natural methods as contact between adjacent plants or seeds or pollen or through insects .
Within the plant transmission occurs through plasmodesmata or systemically through vascular tissues such as phloem .
62) viroids can cause devastating effects on plants .The RNA particle within viroids cannot code for a protein . But they may have matching complimentary sequence to the host genome there by altering the final proteins and also plant cellular mechanisms.
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61.How do viroids move through plants?
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