When anthesis occurs, the pollen of zygo cactus is spherical, tricellular, and about 54 to 62 micro-meters in diameter. After pollination it only takes around a half an hour for germination to occur in fully developed stigmas with the appropriate pollen. Also after pollination it takes about 40 minutes for pollen tubes to emerge from the stigma surface. After about six months after pollination, seeds reached their maturity.
Authors are Thomas H Boyle, Renate Karle, and Susan S Han
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