What is siphonogamy and porogamy. Siphonogamy refers to a type of fertilization process that involves the transfer of pollen through a specialized structure, allowing for the delivery of sperm to the ovule in seed plants. Syngamy: It is the fusion of haploid male gamete with a haploid female gamete (egg). As non-motile male gametes are carried through hollow pollen tubes, it is known as siphonogamy that ensures fertilization to take place. Type of pollen entry The pollen tube enters the ovule either through the micropyle (Porogamy eg. Syngamy: It is the fusion of haploid male gamete with haploid female gamete (egg). The seed plants are siphonogamous, while in the lower plants the male cells usually swim to the eggs. Lily), Chalaza (Chalazogamy eg. 30. (i) Define : Siphonogamy. (iii) Fertilization with pollen tube is often called siphonogamy. . Question of Class 12-Microsporogenesis : Microsporogenesis can be define as the process in which each microspore mother cell divides meiotically to form four haploid microspores or pollen grains. Watery contents of synergid are absorbed by the pollen tube, which then ruptures and releases the contents, including the two non-motile male gametes. (ii) Differentiate between chalazogamy and porogamy with respect to the entry of the pollen tube. Sep 9, 2025 · In summary, zooidogamy is a type of plant reproduction in which male gametes swim in water to reach female gametes, while siphonogamy is a type of plant reproduction in which male gametes travel through a pollen tube to reach female gametes. May 6, 2025 · Solution For Q. Figure \ (\PageIndex {4}\): Open fertilization in seed plants (left) with the help of liquid extracted by mother plant; and fertilization with pollen tube (right), or siphonogamy, with the help of pollen tube growing from male gametophyte. As non-motile male gametes are carried through a hollow pollen tube, it is known as siphonogamy that ensures fertilization to take place. The process was first discovered by Strasburger (1884) in Monotropa Siphonogamy In seed plants, the male gametes arebrought to the eff containing female gametophyte by a pollen tube, the phenomenon is calledsiphonogamy. Siphonogamy is a condition in plants in which pollen tubes are developed for the transfer of the male cells to the eggs Siphonogamy is a condition in plants in which pollen tubes are developed for the transfer of the male cells to the eggs. Fertilization mainly involves two processes: Syngamy and Triple fusion. Jun 22, 2020 · The key difference between zooidogamy and siphonogamy is that zooidogamy is a condition in which male gametes swim in the water to reach their female gametes while siphonogamy is a condition in which pollen tubes are developed to carry male gametes to female gametes. As non-motile male gametes are carried through hollow pollen tube, it is known as siphonogamy that ensures fertilization to take place. The innovation is universal among seed plants (the spermatophytes) and contrasts with the free-swimming gametes of bryophytes, pteridophytes and many algal groups. Siphonogamy is a condition in which non-motile sperm are transported to the egg through a microscopic pollen tube. afehuy gxrl wfvk agmyq rgcn pfjfs cagh irzgdrq mul jhc