In gametophytic self-incompatibility The egg and sperm have incompatible recepto
ID: 264156 • Letter: I
Question
In gametophytic self-incompatibility
The egg and sperm have incompatible receptors during fertilization
The egg has already been fertilized and rejects additional sperm
E3 ubiquitin ligases in the pollen tube recognize non-self RNases from the style, and target them for degradation
The style does not transport needed nutrients to the pollen tube, causing it to starve
Receptors on the stigma recognize proteins in the pollen coat (exine) and prevent the transfer of water and nutrients required for pollen tube germination.
A.The egg and sperm have incompatible receptors during fertilization
B.The egg has already been fertilized and rejects additional sperm
C.E3 ubiquitin ligases in the pollen tube recognize non-self RNases from the style, and target them for degradation
D.The style does not transport needed nutrients to the pollen tube, causing it to starve
E.Receptors on the stigma recognize proteins in the pollen coat (exine) and prevent the transfer of water and nutrients required for pollen tube germination.
Explanation / Answer
In gametophytic self-incompatibility The egg and sperm have incompatible recepto