Desiccated <i>Syntrichia ruralis</i> shoots regenerate after 20 years in the herbarium

Stark, Lloyd R.; Greenwood, Joshua L.; Brinda, John C.

doi:10.1080/03736687.2016.1176307

Cited by 33 publications

(21 citation statements)

References 57 publications

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“…Desiccation-tolerant mosses can suspend metabolism and maintain cell integrity during dry periods (Mansour and Hallet, 1981;Platt et al, 1994); then, within a few minutes to a few hours after being rehydrated, they can resume cellular activity and return to a normal, hydrated state (Platt et al, 1994;Pressel et al, 2006). However, the decline and disappearance of the regenerative capacity of Syntrichia ruralis showed that longterm desiccation can cause irreversible damage, despite viability differences among individuals (Stark et al, 2017). It remains unclear why the potential for vegetative propagation in mosses can be altered by storage and why recovery ability following drought-induced dormancy varies among moss species.…”

Section: Y Guo and Y Zhao: Effects Of Storage Temperature On Desiccmentioning

confidence: 99%

“…Adult gametophytes of some species can recover physiological activities and generate new shoots after being stored for more than 10 years in a desiccated state (Stark et al, 2017;Keever, 1957). Desiccation-tolerant mosses can suspend metabolism and maintain cell integrity during dry periods (Mansour and Hallet, 1981;Platt et al, 1994); then, within a few minutes to a few hours after being rehydrated, they can resume cellular activity and return to a normal, hydrated state (Platt et al, 1994;Pressel et al, 2006).…”

Section: Y Guo and Y Zhao: Effects Of Storage Temperature On Desiccmentioning

confidence: 99%

“…Vegetative propagation is an important reproduction mode of bryophytes (hornworts, liverworts, and mosses) in dry habitats, and gametophyte fragments may serve as the dominant inoculum in mosses (Mishler, 1988;Tian et al, 2005). To date, several moss cultivation experiments have been conducted in which gametophyte fragments are used to establish new colonies in the laboratory and field (Cleavitt, 2002;Jones and Rosentreter, 2006;Xiao et al, 2015).…”

Section: Y Guo and Y Zhao: Effects Of Storage Temperature On Desiccmentioning

confidence: 99%

“…Biocrusts are widely distributed in arid and semiarid ecosystems and play important roles in soil surface stabilization, soil fertility enhancement, and soil hydrology regulation (Belnap and Lange, 2003). As major components of later successional biocrusts, mosses exert much stronger ecological functions than cyanobacteria (Seppelt et al, 2016;Gao et al, 2017;Lan et al, 2012). Thus, some researchers suggest artificially culturing moss biocrusts on degraded soil surfaces to accelerate the recovery of degraded arid and semiarid ecosystems (Belnap and Eldridge, 2003;Zhao et al, 2016).…”

Section: Introductionmentioning

confidence: 99%

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Effects of storage temperature on the physiological characteristics and vegetative propagation of desiccation-tolerant mosses

Yue-wei

Zhao

2018

Biogeosciences

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Abstract. Mosses, as major components of later successional biological soil crusts (biocrusts), play many critical roles in arid and semiarid ecosystems. Recently, some species of desiccation-tolerant mosses have been artificially cultured with the aim of accelerating the recovery of biocrusts. Revealing the factors that influence the vegetative propagation of mosses, which is an important reproductive mode of mosses in dry habitats, will benefit the restoration of moss crusts. In this study, three air-dried desiccationtolerant mosses (Barbula unguiculata, Didymodon vinealis, and Didymodon tectorum) were hermetically sealed and stored at five temperature levels (0, 4, 17, 25, and 30 • C) for 40 days. Then, the vegetative propagation and physiological characteristics of the three mosses were investigated to determine the influence of storage temperature on the vegetative propagation of desiccation-tolerant mosses and the mechanism. The results showed that the vegetative propagation of the three mosses varied with temperature. The most variation in vegetative propagation among storage temperatures was observed in D. tectorum, followed by the variation observed in B. unguiculata. In contrast, no significant difference in propagation among temperatures was found in D. vinealis. The regenerative capacity of the three mosses increased with increasing temperature from 0 to 17 • C, accompanied by a decrease in malondialdehyde (MDA) content, and decreased thereafter. As the temperature increased, the chlorophyll and soluble protein contents increased in B. unguiculata but decreased in D. vinealis and D. tectorum. As to storage, the MDA and soluble sugar contents increased after storage. The MDA content of the three mosses increased at each of the investigated temperatures by more than 50 % from the initial values, and the soluble sugar content became higher than before in the three mosses. The integrity of cells and cell membranes is likely the most important factor influencing the vegetative propagation of desiccation-tolerant mosses. A 40-day storage period caused cell injury. Our results suggest that storage temperature can enhance or suppress such injury and change the regenerative capacity of the three mosses. The data indicate that the suitable storage temperature is 4 • C for B. unguiculata and 17 • C for both D. vinealis and D. tectorum.

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Section: Y Guo and Y Zhao: Effects Of Storage Temperature On Desiccmentioning

confidence: 99%

Section: Y Guo and Y Zhao: Effects Of Storage Temperature On Desiccmentioning

confidence: 99%

Section: Y Guo and Y Zhao: Effects Of Storage Temperature On Desiccmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Effects of storage temperature on the physiological characteristics and vegetative propagation of desiccation-tolerant mosses

Yue-wei

Zhao

2018

Biogeosciences

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show abstract

Section: Introductionmentioning

confidence: 99%

Effects of storage temperature on physiological characteristics and vegetative propagation of desiccation-tolerant mosses

Guo¹,

Zhao²

2017

Preprint

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Mosses, as major components of later successional biological soil crusts (biocrusts), play many critical roles in arid and semiarid ecosystems. Recently, some species of desiccation-tolerant mosses have been artificially cultured with the aim of accelerating the recovery of biocrusts. Revealing the factors that influence the vegetative propagation of mosses, which is an important reproductive mode of mosses in dry habitats, will benefit the restoration of moss crusts. In this study, three air-dried desiccationtolerant mosses (Barbula unguiculata, Didymodon vinealis, and Didymodon tectorum) were hermetically sealed and stored at five temperature levels (0, 4, 17, 25, and 30 • C) for 40 days. Then, the vegetative propagation and physiological characteristics of the three mosses were investigated to determine the influence of storage temperature on the vegetative propagation of desiccation-tolerant mosses and the mechanism. The results showed that the vegetative propagation of the three mosses varied with temperature. The most variation in vegetative propagation among storage temperatures was observed in D. tectorum, followed by the variation observed in B. unguiculata. In contrast, no significant difference in propagation among temperatures was found in D. vinealis. The regenerative capacity of the three mosses increased with increasing temperature from 0 to 17 • C, accompanied by a decrease in malondialdehyde (MDA) content, and decreased thereafter. As the temperature increased, the chlorophyll and soluble protein contents increased in B. unguiculata but decreased in D. vinealis and D. tectorum. As to storage, the MDA and soluble sugar contents increased after storage. The MDA content of the three mosses increased at each of the investigated temperatures by more than 50 % from the initial values, and the soluble sugar content became higher than before in the three mosses. The integrity of cells and cell membranes is likely the most important factor influencing the vegetative propagation of desiccation-tolerant mosses. A 40-day storage period caused cell injury. Our results suggest that storage temperature can enhance or suppress such injury and change the regenerative capacity of the three mosses. The data indicate that the suitable storage temperature is 4 • C for B. unguiculata and 17 • C for both D. vinealis and D. tectorum.

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Cynodontium luthii sp. nov.: a permineralized moss gametophyte from the Late Cretaceous of the North Slope of Alaska

Bippus

Rothwell

Stockey

2021

American J of Botany

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PREMISE Mosses are a major component of Arctic vegetation today, with >500 species known to date. However, the origins of the Arctic moss flora are poorly documented in the fossil record, especially prior to the Pliocene. Here, we present the first anatomically preserved pre‐Cenozoic Arctic moss and discuss how the unique biology of bryophytes has facilitated their success in polar environments over geologic time. METHODS A permineralized fossil moss gametophyte within a block of Late Cretaceous terrestrial limestone, collected along the Colville River on the North Slope of Alaska, was studied in serial sections prepared using the cellulose acetate peel technique. RESULTS The moss gametophyte is branched and has leaves with a broad base, narrow blade, and excurrent costa. We describe this fossil as Cynodontium luthii sp. nov., an extinct species of a genus that is known from the High Arctic today. Cynodontium luthii is the oldest evidence of the family Rhabdoweisiaceae (by ≥18 Ma) and reveals that genera of haplolepideous mosses known in the extant Arctic flora also lived in high‐latitude temperate deciduous forests during the Late Cretaceous. CONCLUSIONS The occurrence of C. luthii in Cretaceous sediments, together with a rich Pliocene‐to‐Holocene fossil record of extant moss genera in the High Arctic, suggests that some moss lineages have exploited their poikilohydric, cold‐ and desiccation‐tolerant physiology to live in the region when it experienced both temperate and freezing climates.

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Desiccated Syntrichia ruralis shoots regenerate after 20 years in the herbarium

Cited by 33 publications

References 57 publications

Effects of storage temperature on the physiological characteristics and vegetative propagation of desiccation-tolerant mosses

Effects of storage temperature on the physiological characteristics and vegetative propagation of desiccation-tolerant mosses

Effects of storage temperature on physiological characteristics and vegetative propagation of desiccation-tolerant mosses

Cynodontium luthii sp. nov.: a permineralized moss gametophyte from the Late Cretaceous of the North Slope of Alaska

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