Effects of hypergravity stimulus on global gene expression during reproductive growth in <scp><i>A</i></scp>rabidopsis

Tamaoki, Daisuke; Karahara, Ichirou; Nishiuchi, Takumi; Wakasugi, Tatsuya; Yamada, Kyoji; Kamisaka, Seiichiro

doi:10.1111/plb.12124

Cited by 13 publications

(8 citation statements)

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“…Hypergravity environments produced by centrifugation have provided a practical experimental system for angiosperms (Hoson et al 1996; Manzano et al 2012; Nava et al 2015; Soga et al 2015; Tamaoki et al 2014; Waldron and Brett 1990; Zhang et al 2013). However, these experiments were often performed under dark conditions with strong hypergravity (>30× g ), and did not involve bryophytes.…”

Section: Introductionmentioning

confidence: 99%

A hypergravity environment increases chloroplast size, photosynthesis, and plant growth in the moss Physcomitrella patens

et al. 2016

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The physiological and anatomical responses of bryophytes to altered gravity conditions will provide crucial information for estimating how plant physiological traits have evolved to adapt to significant increases in the effects of gravity in land plant history. We quantified changes in plant growth and photosynthesis in the model plant of mosses, Physcomitrella patens, grown under a hypergravity environment for 25 days or 8 weeks using a custom-built centrifuge equipped with a lighting system. This is the first study to examine the response of bryophytes to hypergravity conditions. Canopy-based plant growth was significantly increased at 10×g, and was strongly affected by increases in plant numbers. Rhizoid lengths for individual gametophores were significantly increased at 10×g. Chloroplast diameters (major axis) and thicknesses (minor axis) in the leaves of P. patens were also increased at 10×g. The area-based photosynthesis rate of P. patens was also enhanced at 10×g. Increases in shoot numbers and chloroplast sizes may elevate the area-based photosynthesis rate under hypergravity conditions. We observed a decrease in leaf cell wall thickness under hypergravity conditions, which is in contrast to previous findings obtained using angiosperms. Since mosses including P. patens live in dense populations, an increase in canopy-based plant numbers may be effective to enhance the toughness of the population, and, thus, represents an effective adaptation strategy to a hypergravity environment for P. patens.

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Section: Introductionmentioning

confidence: 99%

A hypergravity environment increases chloroplast size, photosynthesis, and plant growth in the moss Physcomitrella patens

et al. 2016

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“…; Tamaoki et al . ). Early gravity effects were demonstrated for signalling molecules, calcium homeostasis, cytoskeletal arrangement and activities, plasma membrane properties and composition and cell wall components.…”

Section: Implementation Of the Recommendations From The 1996 Workhopmentioning

confidence: 97%

“…This is probably the area of research that has received highest attention over recent years. In many experiments, especiallybut not only -with Arabidopsis, hundreds of genes were found to be up-or down-regulated in response to microgravity, hypergravity or changing gravity levels (Martzivanou et al 2006;Paul et al 2011;Aubry-Hivet et al 2014;Nasir et al 2014;Tamaoki et al 2014). Early gravity effects were demonstrated for signalling molecules, calcium homeostasis, cytoskeletal arrangement and activities, plasma membrane properties and composition and cell wall components.…”

Section: Graviperceptionmentioning

confidence: 99%

Plant biology in space: recent accomplishments and recommendations for future research

Ruyters

Braun

2013

Plant Biol J

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Gravity has shaped the evolution of life since its origin. However, experiments in the absence of this overriding force, necessary to precisely analyse its role, e.g. for growth, development, and orientation of plants and single cells, only became possible with the advent of spaceflight. Consequently, this research has been supported especially by space agencies around the world for decades, mainly for two reasons: first, to enable fundamental research on gravity perception and transduction during growth and development of plants; and second, to successfully grow plants under microgravity conditions with the goal of establishing a bioregenerative life support system providing oxygen and food for astronauts in long-term exploratory missions. For the second time, the International Space Life Sciences Working Group (ISLSWG), comprised of space agencies with substantial life sciences programmes in the world, organised a workshop on plant biology research in space. The present contribution summarises the outcome of this workshop. In the first part, an analysis is undertaken, if and how the recommendations of the first workshop held in Bad Honnef, Germany, in 1996 have been implemented. A chapter summarising major scientific breakthroughs obtained in the last 15 years from plant research in space concludes this first part. In the second part, recommendations for future research in plant biology in space are put together that have been elaborated in the various discussion sessions during the workshop, as well as provided in written statements from the session chairs. The present paper clearly shows that plant biology in space has contributed significantly to progress in plant gravity perception, transduction and responses - processes also relevant for general plant biology, including agricultural aspects. In addition, the interplay between light and gravity effects has increasingly received attention. It also became evident that plants will play a major role as components of bioregenerative life support and energy systems that are necessary to complement physico-chemical systems in upcoming long-term exploratory missions. In order to achieve major progress in the future, however, standardised experimental conditions and more advanced analytical tools, such as state-of-the-art onboard analysis, are required.

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“…A comprehensive analysis of global gene expression of floral buds reveals that hypergravity substantially changes expression of genes involved in the biosynthesis of phytohormones such as abscisic acid and auxin (Tamaoki et al . ).…”

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confidence: 97%

Plant biology in space

et al. 2013

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Plant Biol.ISI Document Delivery No.: 277NVTimes Cited: 0Cited Reference Count: 24Ruyters, G. Spiero, F. Legue, V. Palme, K.Wiley-blackwellHoboken1Si[début du texte]In August 2012, more than 60 invited scientists and representatives of space agencies from different continents, nationalitiesand disciplines attended the international workshop on ‘Plant Biology Research in Space’, held at the University of Freiburg, Germany. This workshop – jointly organised by the French and German space agencies, CNES and DLR – was embedded as satellite symposium into the Plant Biology Congress 2012, held by FESPB and EPSO, the two leading European organisations involved in plant research. Using this setup, it was also hoped that scientists from the so-called nonspace community would be attracted to the specific topic of plant biology in space. This idea proved very successful: more than 600 participants attended – for instance – the plenary lecture from Stan Roux on ‘New insights in plant biology gained from space research’

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Effects of hypergravity stimulus on global gene expression during reproductive growth in Arabidopsis

Cited by 13 publications

References 69 publications

A hypergravity environment increases chloroplast size, photosynthesis, and plant growth in the moss Physcomitrella patens

A hypergravity environment increases chloroplast size, photosynthesis, and plant growth in the moss Physcomitrella patens

Plant biology in space: recent accomplishments and recommendations for future research

Plant biology in space

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