Development of the anti-gravitational system in land plants and its implication for the interaction between plants and other organisms

Hoson, Takayuki

doi:10.2187/bss.17.54

Cited by 6 publications

(4 citation statements)

References 16 publications

(10 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…1,2 Nevertheless, the presence of this gravity response has not been properly recognized for long, and its mechanism has been often confused with that of gravitropism. We have termed this response 'gravity resistance', and examined its mechanism mainly using hypergravity conditions produced by centrifugation.…”

Section: Gravity Resistance In Plantsmentioning

confidence: 99%

Cortical microtubules are responsible for gravity resistance in plants

Hoson

Matsumoto²,

Soga³

et al. 2010

Plant Signaling & Behavior

Self Cite

View full text Add to dashboard Cite

Section: Gravity Resistance In Plantsmentioning

confidence: 99%

Cortical microtubules are responsible for gravity resistance in plants

Hoson

Matsumoto²,

Soga³

et al. 2010

Plant Signaling & Behavior

Self Cite

View full text Add to dashboard Cite

“…At the same time, plants have had to develop a tough body to resist the gravitational force. This was an especially critical process for plant ancestors to survive at a terrestrial environment, when they moved from the sea to the land about 450 million years ago (Hoson , ; Volkmann & Baluska ). Mechanical resistance to the gravitational force is thus a principal graviresponse in plants, comparable to gravitropism.…”

Section: Introductionmentioning

confidence: 99%

Growth stimulation in inflorescences of an Arabidopsis tubulin mutant under microgravity conditions in space

et al. 2013

View full text Add to dashboard Cite

Cortical microtubules are involved in plant resistance to hypergravity, but their roles in resistance to 1 g gravity are still uncertain. To clarify this point, we cultivated an Arabidopsis α-tubulin 6 mutant (tua6) in the Cell Biology Experiment Facility on the Kibo Module of the International Space Station, and analyzed growth and cell wall mechanical properties of inflorescences. Growth of inflorescence stems was stimulated under microgravity conditions, as compared with ground and on-orbit 1 g conditions. The stems were 10-45% longer and their growth rate 15-55% higher under microgravity conditions than those under both 1 g conditions. The degree of growth stimulation tended to be higher in the tua6 mutant than the wild-type Columbia. Under microgravity conditions, the cell wall extensibility in elongating regions of inflorescences was significantly higher than the controls, suggesting that growth stimulation was caused by cell wall modifications. No clear differences were detected in any growth or cell wall property between ground and on-orbit 1 g controls. These results support the hypothesis that cortical microtubules generally play an important role in plant resistance to the gravitational force.

show abstract

“…The development of the response has played an important role in the transition of plant ancestors from an aquatic environment to a terrestrial environment and in the consequent establishment of land plants (Hoson, 2003(Hoson, , 2006. Nevertheless, the presence of this gravity response has not been properly recognized for long, and its mechanism has been often confused with that of gravitropism.…”

Section: Introductionmentioning

confidence: 99%

Growth and Cell Wall Properties in Hypocotyls of Arabidopsis tua6 Mutant under Microgravity Conditions in Space

et al. 2009

Self Cite

View full text Add to dashboard Cite

Seedlings of Arabidopsis α-tubulin 6 mutant (tua6 ) were cultivated under microgravity conditions in the European Modular Cultivation System on the International Space Station, and growth and cell wall properties of their hypocotyls were analyzed (the Resist Wall experiment). Seeds of tua6 mutant were shown to germinate and grow normally until the seedling stage under microgravity conditions, as at 1 G on the ground. The seedlings were naturally air-dried in orbit, which were then recovered and transported to earth. When the mechanical properties of the cell wall of rehydrated hypocotyls were examined with a tensile tester, the hypocotyls showed typical stress-strain and stress-relaxation curves, as normally fixed or frozen materials. Also, no promine nt dif fe r e nc e s we r e d e te c te d in the extensibility or the stress-relaxation parameters of the cell wall between spaceg r ow n hy p o c o t yl s a n d g r o u n d c o n t r o l s , suggesting that tua6 hypocotyls formed the regular cell wall architecture under microgravity conditions. The results and lessons learned from the Resist Wall experiment are expected to provide the basis for the following space experiments to clarify the mechanism of gravity resistance in plants.

show abstract

Development of the anti-gravitational system in land plants and its implication for the interaction between plants and other organisms

Cited by 6 publications

References 16 publications

Cortical microtubules are responsible for gravity resistance in plants

Cortical microtubules are responsible for gravity resistance in plants

Growth stimulation in inflorescences of an Arabidopsis tubulin mutant under microgravity conditions in space

Growth and Cell Wall Properties in Hypocotyls of Arabidopsis tua6 Mutant under Microgravity Conditions in Space

Contact Info

Product

Resources

About