Ecological Significance of Morphological Characters in the Moss Gametophyte

Schofield, W. B.

doi:10.2307/3242819

Cited by 64 publications

(38 citation statements)

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“…It is unknown what exactly made desorption from mosses under dense canopies slow down or nearly stagnate at moisture levels as high as 150-200%. The results of this study support the idea that boreal mosses, despite lacking effective internal water transport and cuticular resistance to evaporation, can to some degree restrict desorption through the overall structure of the moss mats (Dilks and Proctor, 1979;Schofield, 1981;Proctor and Smith, 1995) and sometimes stomata-resembling organs (Raven, 2003) especially under a sheltering canopy.…”

Section: Effect Of Stand Structure On Fuel Moisturesupporting

confidence: 78%

Moisture dynamics of moss-dominated surface fuel in relation to the structure of Picea abies and Pinus sylvestris stands

Tanskanen

Granström

Venäläinen

et al. 2006

Forest Ecology and Management

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Section: Effect Of Stand Structure On Fuel Moisturesupporting

confidence: 78%

Moisture dynamics of moss-dominated surface fuel in relation to the structure of Picea abies and Pinus sylvestris stands

Tanskanen

Granström

Venäläinen

et al. 2006

Forest Ecology and Management

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“…1C). They have been proposed to participate in pathogen protection, vegetative propagation, reproductive organ dehiscence, and sperm dispersal (Reese, 1955;Schofield, 1981;Glime, 2007). As we could not connect them to PpSHI activity, auxin responses, or antheridia initiation (Supplemental Fig.…”

Section: Organ Phyllotaxis Differs Between P Patens Vegetative and Rmentioning

confidence: 93%

The MossPhyscomitrella patensReproductive Organ Development Is Highly Organized, Affected by the TwoSHI/STYGenes and by the Level of Active Auxin in theSHI/STYExpression Domain

et al. 2013

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In order to establish a reference for analysis of the function of auxin and the auxin biosynthesis regulators SHORT INTERNODE/ STYLISH (SHI/STY) during Physcomitrella patens reproductive development, we have described male (antheridial) and female (archegonial) development in detail, including temporal and positional information of organ initiation. This has allowed us to define discrete stages of organ morphogenesis and to show that reproductive organ development in P. patens is highly organized and that organ phyllotaxis differs between vegetative and reproductive development. Using the PpSHI1 and PpSHI2 reporter and knockout lines, the auxin reporters GmGH3 pro :GUS and PpPINA pro :GFP-GUS, and the auxin-conjugating transgene PpSHI2 pro :IAAL, we could show that the PpSHI genes, and by inference also auxin, play important roles for reproductive organ development in moss. The PpSHI genes are required for the apical opening of the reproductive organs, the final differentiation of the egg cell, and the progression of canal cells into a cell death program. The apical cells of the archegonium, the canal cells, and the egg cell are also sites of auxin responsiveness and are affected by reduced levels of active auxin, suggesting that auxin mediates PpSHI function in the reproductive organs.

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“…, time required to lose 50% of WC max ; V, cushion volume ; WC, plant water content as a percentage of DM ; WC min , cushion WC when air-dry. spectively (Schofield, 1981 ;Proctor & Smith, 1995). Much less attention has been paid to intraspecific differences in form.…”

Section: mentioning

confidence: 99%

Water relations and carbon gain are closely related to cushion size in the moss Grimmia pulvinata

et al. 2000

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The present study of structural and physiological changes during the development of the cushion moss, Grimmia pulvinata, quantifies the size-dependence of various parameters of water relations such as changes in surface : volume ratio (S\V ) or water loss rates, and also measures net CO # gas exchange in the light and the dark. Larger cushions had lower S\V values than smaller ones and featured lower rates of area-based evapotranspiration, owing to higher boundary-layer resistance, but did not differ in relative water storage capacity (expressed as a percentage of d. wt). In combination, this leads to considerably longer hydration periods in larger cushions. By contrast, CO # gas-exchange parameters were negatively correlated with size : larger cushions showed significantly lower (mass-based) rates of net photosynthesis and dark respiration. Using these data, we estimated carbon budgets during a drying cycle as a function of cushion size. When including alternations of dark and light periods, the relationship proved to be rather complicated. Depending on the time of hydration, net carbon budgets not only varied quantitatively with size but sometimes took on both positive and negative values depending on cushion size. We conclude that neglecting plant size can lead to unrepeatable or even misleading results in comparative ecophysiological studies, and therefore urge for adequate attention to be paid to size in these studies.

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Ecological Significance of Morphological Characters in the Moss Gametophyte

Cited by 64 publications

References 0 publications

Moisture dynamics of moss-dominated surface fuel in relation to the structure of Picea abies and Pinus sylvestris stands

Moisture dynamics of moss-dominated surface fuel in relation to the structure of Picea abies and Pinus sylvestris stands

The MossPhyscomitrella patensReproductive Organ Development Is Highly Organized, Affected by the TwoSHI/STYGenes and by the Level of Active Auxin in theSHI/STYExpression Domain

Water relations and carbon gain are closely related to cushion size in the moss Grimmia pulvinata

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