pollen tube वाक्य
उदाहरण वाक्य
मोबाइल
- The pollen grain then takes in moisture and begins to germinate, forming a pollen tube that extends down toward the micropyle opening in the ovule.
- Sperm cells of Pinophyta and Gnetophyta are without flagella, and are carried by the pollen tube, while those of Cycadophyta and Ginkgophyta have many flagella.
- The germinated pollen tube must then drill its way through the nutrient-rich style and curl to the bottom of the ovary to reach the ovule.
- Activation involves the development of actin filaments throughout the cytoplasm of the cell, which eventually become concentrated at the point from which the pollen tube will emerge.
- Under a constant electric field of 1 V / cm pollen tubes of " Camellia japonica " have been reported to grow towards the negative electrode.
- Exo-PGs involved in pollen tube growth need Ca 2 + for maximal enzymatic activity and can be inhibited by high concentrations of NaCl, citrate, and EDTA.
- The pollen tube growth is similar to the infection thread development in that infection threads grow in a polar manner that is similar to a pollen tubes polar growth towards the ovules.
- The pollen tube growth is similar to the infection thread development in that infection threads grow in a polar manner that is similar to a pollen tubes polar growth towards the ovules.
- He describes the standard arrangement in angiosperms the nucellus joined by the chalaza to the integuments, which surround the nucellus except at the micropyle, through which the pollen tubes enter.
- The four resulting cells consist of a large tube cell that forms the pollen tube, a generative cell that will produce two sperm by mitosis, and two prothallial cells that degenerate.
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