What Is self-incompatibility? Why does self-pollination riot lead to seed formation in self-incompatible species?
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Self-incompatibility is a genetic mechanism in which pollen areprevented from fertilizing the ovules by inhibiting pollen germination or pollen tube growth in the pistil. Self-pollination does not lead to seed formation in self-incompatible species due of interaction between the chemicals of the pollen and stigma.
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ꜱᴇʟꜰ-ɪɴᴄᴏᴍᴘᴀᴛɪʙɪʟɪᴛʏ ʀᴇꜰᴇʀꜱ ᴛᴏ ᴀ ɢᴇɴᴇᴛɪᴄᴀʟʟʏ ᴄᴏɴᴛʀᴏʟʟᴇᴅ ᴍᴇᴄʜᴀɴɪꜱᴍ ᴛʜᴀᴛ ᴘʀᴇᴠᴇɴᴛꜱ ꜱᴇʟꜰ-ᴘᴏʟʟɪɴᴀᴛɪᴏɴ ᴀɴᴅ ᴘʀᴏᴍᴏᴛᴇ ᴄʀᴏꜱꜱ-ᴘᴏʟʟɪɴᴀᴛɪᴏɴ ɪɴ ꜰʟᴏᴡᴇʀꜱ.ꜱᴇʟꜰ-ᴘᴏʟʟɪɴᴀᴛɪᴏɴ ᴄᴀɴɴᴏᴛ ʟᴇᴀᴅ ᴛᴏ ᴛʜᴇ ꜰᴏʀᴍᴀᴛɪᴏɴ ᴏꜰ ꜱᴇᴇᴅꜱ ɪɴ ᴀ ꜱᴇʟꜰ-ɪɴᴄᴏᴍᴘᴀᴛɪʙʟᴇ ꜱᴘᴇᴄɪᴇꜱ. ᴛʜɪꜱ ʜᴀᴘᴘᴇɴꜱ ʙᴇᴄᴀᴜꜱᴇ ᴛʜᴇ ᴘᴏʟʟᴇɴꜱ ᴀʀᴇ ᴜɴᴀʙʟᴇ ᴛᴏ ꜰᴇʀᴛɪʟɪᴢᴇ ᴛʜᴇ ᴏᴠᴜʟᴇꜱ ᴛʜᴀᴛ ᴡᴏᴜʟᴅ ᴅᴇᴠᴇʟᴏᴘ ɪɴᴛᴏ ᴀɴ ᴇᴍʙʀʏᴏ ᴀɴᴅ ʜᴇɴᴄᴇ ꜰᴏʀᴍ ꜱᴇᴇᴅꜱ.
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