Webb23 maj 2024 · Protonema are thread-like structures that grow from a moss spore. Inside the protonema, the chloroplasts gather together to receive the maximum amount of … Webb26 mars 2024 · A protonema is a thread-like structure of a chain of cells. It forms at the very first stage of a bryophyte life cycle. When a moss starts its life from a spore, it …

Protonema suspension cultures of the medicinal moss

Webb13 nov. 2015 · The sexual form, called the gametophyte, begins as a protonema. The protonema is the direct product of spore germination and gives rise to the green leafy plant commonly regarded as a moss. The asexual form, or sporophyte, develops as separate male and female plants, but neither can exist independently. WebbCorrect option is B) Protonema of moss and prothallus of Dryopteris are gametophytic. A protonema is a thread-like chain of cells, that forms the earliest stage of a Bryophyte life cycle. When a moss first grows from the spore, it grows as a protonema, which develops into a leafy gametophore. The spores germinate directly into a new gametophyte ... granlyn west bromwich

Protonema anatomy Britannica

WebbStone is credited with significantly increasing knowledge of mosses in Australia, especially those in Queensland. She was particularly expert in the genera Acaulon, Pleuridium, Eccremidium, Astomum and Nanobryum as well as the moss floras of Victoria and Queensland, the tropical mosses of Australia and those with permanent protonema. WebbDevelopment of protonema stage In mosses: The gametophyte, which has two phases, is the most common stage of a moss's (bryophyte) life cycle. The protonema stage arises … WebbProtonema acts as a transitional structure which is later developed into a gametophyte, completing the life cycle. Note: Mosses sometimes divide asxeually. When a part of leaf or stem breaks off from the plant, they become individual parents … granlyn specialist coatings limited