Main Taxonomic Characteristics & Life Cycle of Spore Cormophyta (Complete)
Main Taxonomic Characteristics & Life Cycle of Spore Cormophyta (Complete) – Previously we have discussed an article related to Main Taxonomic Characteristics and Life Cycle of Seed Cormophyta, Well this time we will discuss about the Taxonomy and Life Cycle of Spore Cormophyta.
Main Taxonomic Characteristics & Life Cycle of Spore Cormophyta (Complete)
Moss and ferns have a similar structure because they both have alternating stages of descent or generation (metagenesis) of the sporophyte (spore-producing) phase and the gametophyte (gamete-producing cell) phase sex). The fertilization process occurs with the help of water, the sperm approaches the ovum due to chemical stimulation in the form of glucose.
In plant taxonomy, mosses (Bryophyta) are divided into three divisions, namely:
- Hepatophyta: group of liverworts. Examples: Riccia sp, Marchantia polymorpha
- Anthocerophyta: group of hornworts. Examples: Andrea, Anthoceros
- Bryophyta: group of leaf mosses. For example: Polytricum.
The group of ferns (Pteridophyta) is divided into four divisions, including:
- Psilopsida. bare nails. Example: Psilotum nudum
- Sphenopsida: wire nails. Example: Equisetum debile
- Lycopsida: seed spikes. Examples: Lycopodium, Sellaginella
- Pteropsids: true spikes. Examples: Adiantum, Pteris, Marsilea crenata.
To make it easier for us to understand the life cycle (metagenesis) of ferns and mosses, we just need to look at the following table:
| Differentiator | Moss | Nail |
| Sporophyte Phase (2n) | Sporogonia (2n) | Fern (2n) |
| Gametophyte Phase (n) | moss plant (n) | Prothallium (n) |
All sporophyte phases must come from the zygote (Zorro) and all gametophyte phases must come from spores (Suparman). The position is always opposite, mosses are dominant in the gemetophyte phase and ferns are dominant in the sporophyte phase.
Remember!
Gametophyte: produces gametes, must have sex organs (antheridium/male and archegonia/female), and can photosynthesize.
Okay, that's all the discussion about Main Taxonomic Characteristics & Life Cycle of Spore Cormophyta (Complete) Hope it is useful. Thank you