Most eukaryotic species depend on sexual reproduction,characterized by fertilization,to produce a new individual.This process requires the transfer of sperm(male gamete),containing half of the genetic information,from...Most eukaryotic species depend on sexual reproduction,characterized by fertilization,to produce a new individual.This process requires the transfer of sperm(male gamete),containing half of the genetic information,from the male to the egg cell(female gamete),which holds half of the maternal genome,within the female reproductive organs.Various strategies have been evolved to ensure fertilization success in plants.展开更多
In flowering plants,pollen tubes are attracted to the ovule by secreted peptides to release the sperm cells for double fertilization.This process is species-specific and acts as an important stage of reproductive isol...In flowering plants,pollen tubes are attracted to the ovule by secreted peptides to release the sperm cells for double fertilization.This process is species-specific and acts as an important stage of reproductive isolation between species.Here we identified a cysteine-rich peptide TICKET2 in Arabidopsis thaliana and its orthologs in Arabidopsis lyrata and Capsella rebella that can attract the conspecific pollen tubes,but not the pollen tubes of relative species in Brassicaceae.Genetic knockout of the AtTICKET subclade compromised the pollen tube attraction efficiency.This study identified a new pollen tube attracting signal and shed light on the molecular basis of reproductive isolation.展开更多
基金supported by the National Key Research and Development Program of China(2022YFF1003500)CAS Project for Young Scientists in Basic Research(YSBR-078)+1 种基金the Strategic Priority Research Program of the Chinese Academy of Science(XDA24020306)the National Natural Science Foundation of China(32170343)。
文摘Most eukaryotic species depend on sexual reproduction,characterized by fertilization,to produce a new individual.This process requires the transfer of sperm(male gamete),containing half of the genetic information,from the male to the egg cell(female gamete),which holds half of the maternal genome,within the female reproductive organs.Various strategies have been evolved to ensure fertilization success in plants.
基金supported by the National Natural Science Foundation of China (31330053 to W.Y. 31622010, 31870295 and 31270351 to H.L.)
文摘In flowering plants,pollen tubes are attracted to the ovule by secreted peptides to release the sperm cells for double fertilization.This process is species-specific and acts as an important stage of reproductive isolation between species.Here we identified a cysteine-rich peptide TICKET2 in Arabidopsis thaliana and its orthologs in Arabidopsis lyrata and Capsella rebella that can attract the conspecific pollen tubes,but not the pollen tubes of relative species in Brassicaceae.Genetic knockout of the AtTICKET subclade compromised the pollen tube attraction efficiency.This study identified a new pollen tube attracting signal and shed light on the molecular basis of reproductive isolation.
