During gametophytic self-incompatibility, RNases from the receiving style enter

Question

During gametophytic self-incompatibility, RNases from the receiving style enter the growing pollen tube and degrade all the RNA in the pollen tube IF the RNase is recognized as “self”; this kills the pollen tube. If the RNase is recognized as “non-self”

A)Histidine phosphor-transfer proteins phosphorylate the non-self RNases to inactivate them and promote continued pollen tube growth

B)Cells in front of the pollen tube commit suicide in a hypersensitive response to make space

C)Pollen tube development is enhanced in a process called “pollen tube canalization”

D)Non-self RNases are tagged with ubiquitin and targeted to the proteosome for degradation.

E)Midi-chlorians give the pollen tubes an internal force to reject the will of the non-self RNases

Explanation / Answer

D) Non-self RNases are tagged with ubiquitin and targeted to the proteosome for degradation.

description-S-RNase exerts cytotoxicity inside the self-pollen tube to inhibit growth .this self/non-self discrimination is controlled by male- and female-specificity determinants.non-self S-RNases and mediates their degradation by the ubiquitin–26S-proteasome system.

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