| 词汇 | thallus |
| 释义 | BETA Examples of thallusthallus isn’t in the Cambridge Dictionary yet. You can help! The whole lichen thallus appears to be vital. The other cell develops into a vegetative organ, the thallus. The symbiotic state enables the lichen thallus to colonize extreme habitats where the separate bionts would not be able to survive. Maximum diameters of a crustose lichen mean that many small areoles or lobules form a conglomerate of thalli. Reproductive strategies, relichenization, and thallus development observed in situ in leaf-dwelling lichen communities. The viability of the mycobiont cells seems to be constant independent of the depth in the thallus layer. This is corroborated by results where lichen thalli lacked the shielding upper cortex. Standard errors of the mean values were determined, indicating the deviation of the ratio of vital tissue tv to the whole lichen thallus t0. These lichens show a different organization from the ' typical ' lichen thallus. Cyanobacteria appeared as key components of these biofilms in zones where there were no lichen thalli nearby. In this respect thallus morphology may be of importance for protecting the symbionts against extreme irradiation, whereas in our experiments anatomical structure primarily serves as a shielding layer. Energy-quenching activity is needed throughout the thallus. This facilitates the formation and existence of the characteristic above-ground lichen thallus, which, in this habitat, may be exposed to high levels of irradiation and desiccating conditions. Preliminary light microscopic observations of fungal and algal colonization and lichen thallus initiation on glass slides placed near foliicolous lichen communities within a lowland tropical forest. That might be interpreted as gigantism, but it means something completely different to a foliose lichen, where one thallus can reach relatively large dimensions in diameter. Contour images of each channel served for precise detection of vital and non-vital tissue over the whole lichen thallus as well as of photobiont clusters. Due to their thallus structure, lichens intercept and reflect more light than other epiphyll organisms, a nd are therefore the primary suspect when it comes to potentially reducing leaf photosynthesis. The erect portion of the thallus is dichotomous or subpinnately branched, flattened and with a distinct midrib. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. The thallus is at first a small flattened or saucer-shaped disc up to three centimetres wide with a short stalk. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. The thallus is nearly flat on the upper surface. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. |
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