Land Plants

Ligrone, Roberto

doi:10.1007/978-3-030-16057-9_11

Cited by 3 publications

(3 citation statements)

References 157 publications

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“…Bryophytes are small non‐vascular plants that include liverworts, mosses and hornworts (Goffinet and Shaw 2009). Unlike other terrestrial plants (embryophytes), poikilohydric gametophyte prevails over the simple unisporangiate sporophyte in their life cycle (Ligrone 2019). Ecologically, they inhabit diverse habitats from drylands to the humid tropics (Smith 2011), often as early pioneers of bare substrates (Man et al 2022).…”

Section: Introductionmentioning

confidence: 99%

Ecological niches of epiphyllous bryophytes along Afrotropical elevation gradient

Doležal

Korznikov

Altman

et al. 2023

Oikos

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Understanding multiple environmental drivers governing tropical organisms' distribution and ecological niches is crucial for predicting their responses to ongoing rapid deforestation. While macroclimatic effects via energy and water availability are well predicted, less is known about locally modulating factors such as canopy structure, light and edaphic conditions. Here we show that minimum temperatures and ambient humidity drive the abundance and richness of leaf-inhabiting epiphyllous bryophytes across 4-km elevation gradient on Mount Cameroon, West Africa, separating epiphyll-rich rainforests (0-2200 m a.s.l.) from epihyll-poor fire-driven afromontane savanna (2300-4000 m a.s.l.). However, local factors contribute more than half to the total abundance and richness variation, either directly (light) or indirectly (edaphic conditions) via their effects on host plant composition. The most abundant epiphyllous communities occur in vertically stratified upland rainforests between 600 and 1100 m elevation, where N-fixing tree legumes dominate. Their canopy is relatively sparse, due to nutrient-poor soils leached by high rainfall, leaving room for the development of diverse subcanopy tree and understory shrub and herb layers with epiphyll-rich communities. Vertically homogenous lowland rainforests on fertile soils below 500 m, with dense overstory and shaded and species-poor understory, have less developed epiphylls, as do seasonally dry montane forests between 2000 and 2300 m, or elephant fragmented forests between 1200 and 1600 m. We conclude that high temperature and humidity together with a vertically stratified canopy support epiphylls, whereas precipitation seasonality, disturbed vegetation with unstable microclimate, or dense, unstratified canopy discourage the development of epiphyllous communities. Our study illustrates that ecological niches of epiphyllous bryophytes are shaped by a complex interplay of multiple drivers, knowledge of which is essential for more realistic predictions of the impacts of current accelerated habitat loss on species distribution and diversity changes in the tropics.

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Section: Introductionmentioning

confidence: 99%

Ecological niches of epiphyllous bryophytes along Afrotropical elevation gradient

Doležal

Korznikov

Altman

et al. 2023

Oikos

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“…Green algae are photoautotrophic eukaryotes, which are the ancestors to higher plants (Ligrone, 2019) and, therefore, they are identical to each other in their basic metabolism, including photosynthesis and photoprotection (Delaux et al, 2015). Chlamydomonas reinhardtii is a freshwater unicellular algal model species widely used for studying and revealing many biological aspects of microalgae relevant to higher plants such as evolution (Bell, 2005), biochemistry and physiology (Couso et al, 2018;Girolomoni et al, 2019;Juvale et al, 2016), mutant generation (Findinier et al , 2017;Li et al, 2016;) and algae-based biofuel production (Scranton et al, 2015).Chlamydomonas cells are haploid, and under favorable growth conditions reproduce asexually during the dark phase of the light:dark cycle (Bruce & Bruce, 1981).…”

Section: Introductionmentioning

confidence: 99%

Abscisic acid confers salinity tolerance in Chlamydomonas reinhardtii at different stages of its life cycle

Abu‐Ghosh¹,

Dubinsky²,

Iluz³

2020

Preprint

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The effect of abscisic acid (ABA) to increase the osmotolerance of the freshwater microalga Chlamydomonas reinhardtii at its different stages of life cycle was investigated. Exogenously added ABA enhanced the growth and photosynthesis of C. reinhardtii during the vegetative stage. The hormone also increased the tolerance of this alga to oxidative stress during gamete formation under nutrient depletion and high salinity, as it supported their survival for a longer period. We show that the level of reactive oxygen species (ROS) generated in the ABA-treated cells was significantly less than that in the untreated cells under inhibiting NaCl concentrations. Cell size examination showed that ABA prevents cells from forming palmella when exposed to high salinity. All together, these results suggest that ABA increases the tolerance of C. reinhardtii to salt stress conditions.

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“…Green algae are photoautotrophic eukaryotes, which are the ancestors to higher plants (Ligrone 2019) and, therefore, they are similar in their basic metabolism, including photosynthesis and photoprotection (Delaux et al. 2015).…”

mentioning

confidence: 99%

Exogenous Abscisic Acid Confers Salinity Tolerance in Chlamydomonas reinhardtii During Its Life Cycle

Abu‐Ghosh

Iluz

Dubinsky

et al. 2021

Journal of Phycology

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The plant hormone abscisic acid (ABA) coordinates responses to environmental signals with developmental changes and is important for stress resilience and crop yield. However, fundamental questions remain about how this phytohormone affects microalgal growth and stress regulation throughout the different stages of their life cycle. In this study, the effects of ABA on the physiology of the freshwater microalga Chlamydomonas reinhardtii at its different life cycle stages were investigated. Exogenously added ABA enhanced the growth and photosynthesis of C. reinhardtii during the vegetative stage. The hormone also increased the tolerance of this alga to high‐salinity stress during gamete formation under nutrient depletion, as well as it extended their survival. We show that the level of reactive oxygen species (ROS) generated in the ABA‐treated cells was significantly less than that in the untreated cells under inhibiting NaCl concentrations. Cell size examination showed that ABA prevents cells from forming palmella when exposed to high salinity. All together, these results suggest that ABA can support the vitality and survival of C. reinhardtii under high salt conditions.

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Land Plants

Cited by 3 publications

References 157 publications

Ecological niches of epiphyllous bryophytes along Afrotropical elevation gradient

Ecological niches of epiphyllous bryophytes along Afrotropical elevation gradient

Abscisic acid confers salinity tolerance in Chlamydomonas reinhardtii at different stages of its life cycle

Exogenous Abscisic Acid Confers Salinity Tolerance in Chlamydomonas reinhardtii During Its Life Cycle

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