It is complementary to a highly conserved sequence close to the 3’ end of 16S rRNA.

The rRNA sequence is the hexamer:

3’. . . U C C U C C . . . 5’

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#Unit 4. Cell Communication and Cell Signaling

Process of infection, colonization, and reproduction is known as pathogenesis.

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#Unit 4. Cell Communication and Cell Signaling

The interactions between organisms from different kingdoms consisting of three phases, referred to as a “zig‐zag‐zig” scheme

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#Unit 4. Cell Communication and Cell Signaling

PRR‐triggered immunity (PTI) of plant cells places selective pressures on potentially pathogenic species to suppress effector response.

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#Unit 4. Cell Communication and Cell Signaling

Suppression of host response is called effector‐triggered susceptibility

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#Unit 4. Cell Communication and Cell Signaling

R genes recognizes effector molecules or the effects of these effectors on host proteins. This form of defense is known as R gene‐mediated defense or effector-triggered immunity

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#Unit 4. Cell Communication and Cell Signaling

ETI are usually stronger than PTI and cause hypersensitive reaction or apoptosis of tissue