Explosive Discharge of Pollen Tube Contents inTorenia fournieri ,
نویسندگان
چکیده
منابع مشابه
SCIENTIFIC CORRESPONDENCE Explosive Discharge of Pollen Tube Contents in Torenia fournieri 1[w]
When animals copulate, the male organ penetrates the female. Similarly, the pollen tube of a flowering plant (the male gametophyte) penetrates the embryo sac (the female gametophyte) and then discharges its contents, which include male gametes. Details of the interaction between the pollen tube and the embryo sac are difficult to observe because of the large number of opaque ovular cells that u...
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The precise guidance of the pollen tube to the embryo sac is critical to the successful sexual reproduction of flowering plants. We demonstrate here the guidance of the pollen tube to the embryo sac in vitro by using the naked embryo sac of Torenia fournieri, which protrudes from the micropyle of the ovule. We developed a medium for culture of both the ovule and the pollen tube of T. fournieri ...
متن کاملSpecies preferentiality of the pollen tube attractant derived from the synergid cell of Torenia fournieri.
The synergid cell of Torenia fournieri attracts pollen tubes by a diffusible but yet unknown chemical attractant. Here we investigated the species difference of the attractant using five closely related species in two genera, namely T. fournieri, Torenia baillonii, Torenia concolor, Lindernia (Vandellia) crustacea, and Lindernia micrantha. These five species have an exserted embryo sac, and abl...
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In flowering plant reproduction, pollen tube reception is the signaling system that results in pollen tube discharge, synergid degeneration, and successful delivery of male gametes (two sperm cells) to the site where they can fuse with female gametes (egg cell and central cell). Some molecules required for this complex and essential signaling exchange have been identified; however, fundamental ...
متن کاملDisruption of the pollen-expressed FERONIA homologs ANXUR1 and ANXUR2 triggers pollen tube discharge.
The precise delivery of male to female gametes during reproduction in eukaryotes requires complex signal exchanges and a flawless communication between male and female tissues. In angiosperms, molecular mechanisms have recently been revealed that are crucial for the dialog between male (pollen tube) and female gametophytes required for successful sperm delivery. When pollen tubes reach the fema...
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ژورنال
عنوان ژورنال: Plant Physiology
سال: 2000
ISSN: 1532-2548,0032-0889
DOI: 10.1104/pp.122.1.11