Pulse Release of Sugars and Polyols from Canopy Bryophytes in Tropical Montane Rain Forest (Guadeloupe, French West Indies)

Coxson, Darwyn S.; McIntyre, Deane D.; Vogel, Hans J.

doi:10.2307/2388665

Cited by 62 publications

(52 citation statements)

References 40 publications

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“…Interestingly, sucrose may be present in the terrestrial environment in which moss sperm are released. Not only does sucrose accumulate inside moss cells that endure desiccation and freezing events (Rütten & Santarius, 1992;Proctor et al, 2007), but sucrose is a major component of the pulse-released suite of compounds found after a rewetting event, post-desiccation (Coxson et al, 1992). Furthermore, sucrose is a constituent of the exudates from moss archegonia (Pfeffer, 1884;Kaiser et al, 1985;Ziegler et al, 1988) and potentially of other vegetation and fruits found in the plant canopy above.…”

Section: Tolerance To Environmental Desiccationmentioning

confidence: 99%

Tolerance to environmental desiccation in moss sperm

2012

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Summary• Sexual reproduction in mosses requires that sperm be released freely into the environment before finding and fertilizing a receptive female. After release from the male plant, moss sperm may experience a range of abiotic stresses; however, few data are available examining stress tolerance of moss sperm and whether there is genetic variation for stress tolerance in this important life stage.• Here, we investigated the effects of environmental desiccation and recovery on the sperm cells of three moss species (Bryum argenteum, Campylopus introflexus, and Ceratodon purpureus).• We found that a fraction of sperm cells were tolerant to environmental desiccation for extended periods (d) and that tolerance did not vary among species. We found that this tolerance occurs irrespective of ambient dehydration conditions, and that the addition of sucrose during dry-down improved cell recovery. Although we observed no interspecific variation, significant variation among individuals within species in sperm cell tolerance to environmental desiccation was observed, suggesting selection could potentially act on this basic reproductive trait.• The observation of desiccation-tolerant sperm in multiple moss species has important implications for understanding bryophyte reproduction, suggesting the presence of a significant, uncharacterized complexity in the ecology of moss mating systems.

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Section: Tolerance To Environmental Desiccationmentioning

confidence: 99%

Tolerance to environmental desiccation in moss sperm

2012

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“…Third, moss beds could shield orchid roots from exposure to wind and sun and thus help buffer plants from desiccation during dry periods (Benzing 1998, Venturieri & Mendoza de Arbieto 2011. Finally, many moss species leach nutrients and other chemicals into water that may stimulate orchid growth (Coxson et al 1992, Carlton & Read 1991, Benzing 1998, Clark et al 1998 or act as fungicides (Frahm 2004), which could perhaps prevent fungal parasitism of Lepanthes. Certainly, these are only a subset of the potential benefits that bryophytes could provide to epiphytic Lepanthes and additional manipulative studies are necessary to test the theories as to why these orchids are associated with bryophyte cover.…”

Section: Methods To Determine If the Local Distribution Ofmentioning

confidence: 99%

On the relationship between bryophyte cover and the distribution of Lepanthes spp. OF LEPanTHES SPP.

Crain¹

2012

Lankesteriana

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Las comunidades epífitas de plantas en los ecosistemas tropicales de montaña son particularmente vulnerables al cambio climático. Lepanthes es un género grande de orquídeas epífitas el cual es prominente en la flora de Costa Rica. Por lo general, estas orquídeas son muy pequeñas, y con frecuencia ocurren en hábitats altamente expuestos, lo que conduce a la teoría de que son dependientes de la cobertura de briófitos para prevenir la desecación. El objetivo de este proyecto fue determinar si la distribución de Lepanthes está limitada por la distribución de la cobertura de musgos en los árboles. Para lograr esto, se midió la cobertura de briófitos sobre los forófitos que hospedan Lepanthes spp., así como en otros árboles desprovistos de briófitos localizados en las áreas circundantes. Los resultados sugieren que Lepanthes spp. esta correlacionada con altos niveles de cobertura de musgos, además hubo substancialmente más cobertura de musgos en los lugares donde Lepanthes ocurre que en los lugares donde no ocurre. En consecuencia, parece que los briofitos forman un comensalismo con este grupo diverso de orquídeas. Los resultados de este estudio concuerdan con estudios similares que sugieren que la cobertura de musgos es importante para el crecimiento y supervivencia de las orquídeas. Por consiguiente, si el cambio climático tiene un impacto negativo en la cobertura de musgos, las orquídeas Lepanthes sufrirían simultáneamente.

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“…desiccation tolerance across taxa (Crowe et al, 1992, Koster, 1991, Smirnoff, 1992, Sun et al, 1994, but sucrose is a known constituent of female moss archegonia (Kaiser et al, 1985, Ziegler et al, 1988 as well as a pulse released sugar from permeable moss tissues during desiccation events (Coxson et al, 1992, Wilson & Coxson, 1999. These data suggest that perhaps the sperm invertebrates, birds and mammals) (Lord & Russell, 2002).…”

Section: 2 24c) Not Only Is Sucrose a Key Compound In Facilitatimentioning

confidence: 97%

“…Not only does sucrose accumulate inside moss cells that endure desiccation and freezing events (Proctor et al, 2007, Rütten & Santarius, 1992, but sucrose is a major component of the pulse-released suite of compounds found after a rewetting event, post desiccation (Coxson et al, 1992). Furthermore, sucrose is a constituent of the exudates from moss archegonia (Pfeffer, 1884, Kaiser et al, 1985, Ziegler et al, 1988 and potentially of other vegetation and fruits found in the plant canopy above.…”

Section: Tolerance To Environmental Desiccationmentioning

confidence: 99%

Testing the Ecological and Physiological Factors Influencing Reproductive Success in Mosses

Shortlidge¹

2000

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As non-vascular, early land plants with an aquatic ancestry, mosses do not regulate internal water conditions separate from that of their environment and as a result, evolved mechanisms to survive in a terrestrial world out of water. Yet, there is a widely accepted dogma that moss reproductive success is solely dependent on rainfall events carrying swimming, bi-flagellate sperm across the landscape to reproductively mature and receptive female mosses -

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Pulse Release of Sugars and Polyols from Canopy Bryophytes in Tropical Montane Rain Forest (Guadeloupe, French West Indies)

Cited by 62 publications

References 40 publications

Tolerance to environmental desiccation in moss sperm

Tolerance to environmental desiccation in moss sperm

On the relationship between bryophyte cover and the distribution of Lepanthes spp. OF LEPanTHES SPP.

Testing the Ecological and Physiological Factors Influencing Reproductive Success in Mosses

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