Search results
Results From The WOW.Com Content Network
The heat and humidity of greenhouses or indoor plant pots evidently creates a habitat in which this species can thrive with garden centres and nurseries serving as hubs to distribute L. birnbaumii all over Europe. Botanical gardens may serve as another means of spreading as visitors unknowingly collect spores on their clothes and bring them ...
If the plant is heterosporous, the sporangia-bearing leaves are distinguished as either microsporophylls or megasporophylls. In seed plants, sporangia are typically located within strobili or flowers. Clusters of sporangia on a fern. Cycads form their microsporangia on microsporophylls which are aggregated into strobili. Megasporangia are ...
Spores can be classified in several ways such as by their spore producing structure, function, origin during life cycle, and mobility. Below is a table listing the mode of classification, name, identifying characteristic, examples, and images of different spore species.
The spores are wind-dispersed and they are often extremely abundant in outdoor air. Indoors Cladosporium species may grow on surfaces when moisture is present. Cladosporium fulvum , cause of tomato leaf mould, has been an important genetic model, in that the genetics of host resistance are understood. [ 4 ]
The spore wall is made up of three layers all with distinct phenotypes. The first layer is hyaline and mucilogenous and is approximately 1.4–2.5 μm thick (mean = 2.1 μm). This layer is found in the juvenile spores of F. mosseae, and degrades as the spore matures and goes through sloughing, producing a granular appearance.
Microscopic photo of spores (in red) of Selaginella. The large three spores at the top are megaspores whereas the numerous smaller red spores at the bottom are microspores. Megaspores, also called macrospores, are a type of spore that is present in heterosporous plants. These plants have two spore types, megaspores and microspores.
Get AOL Mail for FREE! Manage your email like never before with travel, photo & document views. Personalize your inbox with themes & tabs. You've Got Mail!
Plant spores are most obvious in the reproduction of ferns and mosses. However, they also exist in flowering plants where they develop hidden inside the flower. For example, the pollen grains of flowering plants develop out of microspores produced in the anthers. Reproductive spores grow into multicellular haploid individuals or sporelings.