Gravity induces fast electrical field change in soybean hypocotyls

Tanada, T.; Vinten-Johansen, C.

doi:10.1111/1365-3040.ep11580916

Cited by 27 publications

(5 citation statements)

References 10 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The size and rate of the following gravitropic response is positively correlated with the magnitude of the potential change (up to 10 mV) and the length of the area involved in the potential change (Shigematsu et al 1994). In Glycine hypocotyls, the lower surface becomes positively charged within 1±2 min after turning hypocotyls into a horizontal position (Tanada and Vinten-Johansen 1980). Maximum positive potential was measured 1±2 cm below the hook, i.e.…”

Section: Epicotyls Hypocotyls and Coleoptilesmentioning

confidence: 99%

“…a Phaseolus angularis epicotyl: a rapid, local depolarization of the negative surface potential on the upper side precedes downward bending (positive gravitropism), the ®rst response to gravity stimulation of the epicotyls (data from Shigematsu et al 1994). b Glycine max: maximum positive surface charge develops on the lower surface behind the hook before upward bending (data from Tanada and Vinten-Johansen 1980). c Zea mays coleoptile: a positive surface potential at the lower surface precedes upward bending of the coleoptile (data from Woodcock and Wilkins 1971).…”

Section: Epicotyls Hypocotyls and Coleoptilesmentioning

confidence: 99%

See 1 more Smart Citation

BioelectriCity, gravity and plants

Weisenseel

Meyer

1997

Planta

View full text Add to dashboard Cite

This brief review summarizes gravity-induced changes in bioelectric parameters and evaluates their contribution to our understanding of the sensing of gravity, and the transduction and transmission of the gravity stimulus in plants. During the last few decades, information has accumulated demonstrating gravity-induced changes in surface potentials, membrane voltages, endogenous electric currents and ion fluxes. These changes point to the plasma membrane as the site of perception and transduction of the gravity signal. To date, it is reasonable to assume that gravity affects the state of ion channels (in particular, Ca2+ channels) and the activity of ion pumps (in particular, the electrogenic H(+)-ATPase) in the plasma membrane leading to intracellular and apoplasmic changes in ion activities and in membrane voltages. The flow of H+ and Ca2+ currents is probably the means by which information about gravity is amplified and transmitted from sensing to responding cells. No data are available so far about the effect of microgravity on bioelectric parameters. However, it would be interesting to learn if plants become hypersensitive to gravity during a prolonged stay in microgravity. If so, such plants might fire action potentials after return to earth, because more Ca2+ channels than usual may be activated by 1 g in microgravity-adapted plants.

show abstract

Section: Epicotyls Hypocotyls and Coleoptilesmentioning

confidence: 99%

Section: Epicotyls Hypocotyls and Coleoptilesmentioning

confidence: 99%

BioelectriCity, gravity and plants

Weisenseel

Meyer

1997

Planta

View full text Add to dashboard Cite

show abstract

“…More recently, a number of investigations on the effect of gravity change on single cells, shoot and roots of plants have been performed. For example, fast changes (up to 17 mV) in surface potentials following gravitropic stimulation have been observed in soybean hypocotyls 25 , while a transient of rapid surface potential of about 10 mV has been measured in bean epicotyls about 30–120 s after gravistimulation 26 . Concerning the root system, membrane hyperpolarization has been detected in the columella cells 7 and in the transition zone of the root apex 27 under gravistimulation.…”

mentioning

confidence: 99%

The Electrical Network of Maize Root Apex is Gravity Dependent

Masi

Ciszak

Comparini

et al. 2015

Sci Rep

View full text Add to dashboard Cite

Investigations carried out on maize roots under microgravity and hypergravity revealed that gravity conditions have strong effects on the network of plant electrical activity. Both the duration of action potentials (APs) and their propagation velocities were significantly affected by gravity. Similarly to what was reported for animals, increased gravity forces speed-up APs and enhance synchronized electrical events also in plants. The root apex transition zone emerges as the most active, as well as the most sensitive, root region in this respect.L ife on Earth has evolved under omnipresent and stable gravity forces which act on all living organisms of the planet. Such a permanent physical stimulus, influencing both growth and behaviour, has led to the evolution of gravity perceiving systems in almost any organism. This is true also in plants, where gravitropism plays a central role in the whole plant life cycle (see for example refs. 1-3).Fast gravity perceiving systems, when the perception of a changing acceleration is rapidly transduced into electrical signals, have been documented from unicellular organisms 4 up to neuronal tissues 5,6 . In plants, numerous studies indicate that cell membranes, membrane proteins and membrane potentials are involved in the perception of gravity [7][8][9] . Typically, organismal responses to this environmental stimulus involve the modulation of the cell bioelectrical properties 10,11 . Numerous genes are up-and down-regulated in roots of plants exposed to microgravity [12][13][14] . In addition, roots exposed to microgravity change some of their behavioural features such as their responses to electric fields and light 15,16 . However, inherent root behaviour patterns, such as circumnutations and waving/skewing when grown on the agar plates, have turned out to be gravity-independent [17][18] .In animals, the properties of action potentials (APs) have been also found to be gravity-dependent. Experiments with isolated nerve fibres 19 and muscles 20 showed gravity-sensitive APs. For example, their propagation velocities and the frequency of their generation increased under hypergravity and decreased under microgravity conditions compared to the ground control. Alterations in ion channel permeability due to changes in gravity may be involved in these responses 21,22 , indicating that gravity detection might be an intrinsic property of biological membranes and/or of their ion channels.In higher plants, measurements of electrical potentials under gravistimulation (applying a rotation of 90u to the plant body) have been accomplished since the last century 23 . There is substantial evidence that the reorientation of plants in the gravity field induces a transient electrical activity (the so-called ''geoelectric effect'') (for a review see ref. 24). More recently, a number of investigations on the effect of gravity change on single cells, shoot and roots of plants have been performed. For example, fast changes (up to 17 mV) in surface potentials following gravitropic stimulation have bee...

show abstract

“…These changes are thought to be related to speci®c ion currents, among which Ca 2+ seems to play a prominent role (Weisenseel et al 1992). Electrical asymmetries occur within minutes of gravistimulation, and have also been described for shoots and coleoptiles (Tanada and Vinten-Johansen 1980;Imagawa et al 1991;Shigematsu et al 1994). It was originally suggested that asymmetric IAA distribution produced the changed electrical ®elds across the shoots during upward curvature (Wilkins and Woodcock 1965).…”

Section: Biochemical Asymmetriesmentioning

confidence: 89%

“…It was originally suggested that asymmetric IAA distribution produced the changed electrical ®elds across the shoots during upward curvature (Wilkins and Woodcock 1965). In contrast, due to the rapidity of the response, Tanada and Vinten-Johansen (1980) suggested that asymmetric IAA distribution was a consequence of electrical asymmetries between UFs and LFs, whereas Imagawa et al (1991) speculated that electrical asymmetries may mediate asymmetric Ca 2+ distribution during gravitropism.…”

Section: Biochemical Asymmetriesmentioning

confidence: 99%

Gravistimulated asymmetries in the outer epidermal cell walls of graviresponding coleoptiles

Edelmann

1997

Planta

View full text Add to dashboard Cite

Gravitropic plant growth is due to gravistimulated asymmetric extension rates of the affected flanks of the graviresponding organ. Differential growth of the upper and lower flanks (UFs, LFs) of graviresponding plant organs may in principle be achieved by various biochemical and/or biophysical asymmetries. The gravistimulated mechanism(s) by which the different growth rates are determined is still unresolved, as is the mechanism of IAA-regulated growth. The purpose of this brief review is to summarize and critically evaluate data concerning gravistimulated asymmetries, especially with respect to the interface of the plasma membranes and of the extension-restricting, load-bearing epidermal cell walls (Masuda and Yamamoto 1972 Physiol Plant 27:109-115). In addition, recent results obtained by the author in experiments with rye coleoptiles will be presented and discussed in the context of a tentative model of gravistimulated wall asymmetries temporarily causing differential growth.

show abstract

Gravity induces fast electrical field change in soybean hypocotyls

Cited by 27 publications

References 10 publications

BioelectriCity, gravity and plants

BioelectriCity, gravity and plants

The Electrical Network of Maize Root Apex is Gravity Dependent

Gravistimulated asymmetries in the outer epidermal cell walls of graviresponding coleoptiles

Contact Info

Product

Resources

About