WebSuniska Banerjee. 3 years ago. Posted 3 years ago. Direct link to Suniska Banerjee's post “There are 2 male gametes ...”. more. There are 2 male gametes in a pollen grain. One fuses with the egg cell to form zygote and the other fuses with the polar nuclei to form the endosperm (other seed parts) Comment. Button navigates to signup page. WebThe pollen tube is guided by the chemicals secreted by the synergids present in the embryo sac, and it enters the ovule sac through the micropyle. Of the two sperm cells, one sperm fertilizes the egg cell, forming a diploid zygote; the other sperm fuses with the two polar nuclei, forming a triploid cell that develops into the endosperm.
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WebFunctions of synergids are: 1. They secrete chemotactic substances that attract the pollen tube during fertilisation. 2. One of the two synergids degenerate and provide a way for the entry of pollen tube in the embryo sac. 3. These act as shock absorbers during the entry of pollen tube in the embryo sac. So, the correct answer is A. WebOct 28, 2016 · However, little is known regarding the function of pollen tube content (PTC), which is analogous to seminal plasma. We report that the PTC plays a vital role in the prefertilization state and causes an enlargement of ovules without fertilization. We termed this phenomenon as pollen tube-dependent ovule enlargement morphology and placed it ... bottle on a table
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WebThe pollen tube is guided by the chemicals secreted by the synergids present in the embryo sac, and it enters the ovule sac through the micropyle. Of the two sperm cells, one sperm … WebNov 21, 2013 · Author Summary Pollen tube reception is an important step of fertilization and is controlled by interactions between the pollen tube and synergid. Components of both the pollen tube and synergid are believed to be involved in the process. Several proteins associated with this process have been identified in synergid cells. However, very little is … WebWhen pollen adheres to a flower's stigma, it develops into a pollen tube and expands quickly towards the direction of the plant's ovary. The pollen tube explodes when it encounters an ovule releasing sperm cells, that fertilize the ovule & initiate seed development. bottle on car tire when parking