Hydro-Electrochemical Integration of the Higher Plant – Basis for Electrogenic Flower Induction

Wagner, Edgar; Lehner, Lars; Normann, Johannes; Veit, Justyna; Albrechtová, Jolana T. P.

doi:10.1007/3-540-28516-4_25

Cited by 4 publications

(4 citation statements)

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“…This proves that a non-wounding stimulus, i.e., darkening and illumination triggers distinct and rapid turgor changes in the motor region of the sunflower stem. The above presented measurements of growth and circumnutation in sunflower stem contribute to the characteristics of the system of turgor changes [34][35][36][37] which is likely to play an essential role in the integration and coordination of the cell functions in plant organism.…”

Section: Discussionmentioning

confidence: 99%

Complex relationship between growth and circumnutations inHelianthus annuusstem

Stolarz

Król

Dziubińska

et al. 2008

Plant Signaling & Behavior

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The growth and circumnutation of the stem of three-week old Helianthus annuus in the 16:8 h light:dark photoperiod were monitored using an angular position-sensing transducer and a time lapse photography system. It was found that the rate of growth and circumnutation reached a high level in the dark stage; in the light stage, however, only the growth rate reached the same high level, whereas the circumnutations were weak. These results showed that in the light stage the stem circumnutation was downregulated more strongly than the growth. Short-term stem responses to darkening and illumination were a further display of the relation between growth and circumnutations. Switching off the light caused an increase in the growth and circumnutation rate. In some cases it was accompanied by changes in the rotation direction. On the other hand, switching the light on caused an immediate transient (several-minute long) decrease in the growth rate resulting in stem contraction, and this was accompanied by an almost complete pause of circumnutation. Additionally, under light, there occurred a subsequent decrease in the magnitude, disturbance of circumnutation trajectory and, in some cases, changes in the direction of rotation. The observed stem contraction and disturbance of circumnutation imply the occurrence of turgor changes in sunflower stem, which may be caused by a non-wounding, darkening or illumination stimulus. Our experiments indicate that the disturbances of the growth rate are accompanied by changes in circumnutation parameters but we have also seen that there is no simple quantitative relation between growth rate and circumnutation rate.

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Section: Discussionmentioning

confidence: 99%

Complex relationship between growth and circumnutations inHelianthus annuusstem

Stolarz

Król

Dziubińska

et al. 2008

Plant Signaling & Behavior

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“…Moreover, recent advances in the plant molecular biology have identified, besides classical neurotransmitters, also several proteins typical of the animal neuronal systems, such as acetylcholine esterases, glutamate receptors, GABA receptors, and endocannabinoid signaling components, as well as indicating signaling roles for ATP, NO, and ROS (Baluška et al 2006b). Importantly, plant action potentials have turned out to influence processes such as actin-based cytoplasmic streaming, plant organ movements, wound responses, respiration, and photosynthesis, as well as flowering (Wagner et al 2006;Fromm and Lautner 2007). Last, but not least, there have been significant advances in ecological studies on plantplant and plant-insect communications, in behavioral studies on memory and learning phenomena in plants (Trewavas 2005a, b;Galis and 2008;Ripoll et al 2009), as well as the revelation that complex plant behavior (Karban 2008;Scott 2008) implicates signal perception, processing, and the integration of ambient signals (Brenner et al 2006b).…”

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confidence: 98%

Plant neurobiology: from sensory biology, via plant communication, to social plant behavior

Baluška

Mancuso

2008

Cogn Process

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In plants, numerous parameters of both biotic and abiotic environments are continuously monitored. Specialized cells are evolutionary-optimized for effective translation of sensory input into developmental and motoric output. Importantly, diverse physical forces, influences, and insults induce immediate electric responses in plants. Recent advances in plant cell biology, molecular biology, and sensory ecology will be discussed in the framework of recently initiated new discipline of plant sciences, namely plant neurobiology.

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“…O mecanismo de geração de PA depende da atividade dos canais iônicos e sua propagação pode influenciar no crescimento das plantas (Takamura, 2006), nas trocas gasosas e na expressão gênica (Davies et al, 1997). Herde et al, (1995 reportaram que a aplicação de uma corrente elétrica de 10V/30s induziu a propagação (Wagner et al, 2006) que influencia diretamente na ativação de canais de íons mecanosensíveis e na despolarização da membrana , importantes na geração de PV (Zawadzki, 2001;. As plantas são capazes de antecipar mudanças metabólicas e hidráulicas devido a codificação de informações temporais provenientes de um relógio circadiano interno, o que possibilita a interação eficiente do organismo com o ambiente (Gagliano et al, 2016…”

Section: Comportamento Periódico De Potenciais De Ação E De Variação unclassified

Sinais elétricos em microtomateiros mutantes em ABA: aspectos eletrofisiológicos e metabólicos sob diferentes condições hídricas

Silva¹

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Electrical signals in ABA mutant microtomatos: electrophysiological and metabolic aspects under different water conditions Research on plant signaling has traditionally focused on the role of phytohormones, calcium waves and reactive oxygen species as long-distance signaling molecules. However, it is known that plants have the ability to generate electrical signals necessary for intra and intercellular communications in response to different environmental factors, such as light, injuries, water stress and photoperiodism. However, it is not yet clear whether electrical communication is linked to the presence of other signaling pathways such as the abscisic acid pathway, or whether, during periods of stress, such as water deficit, metabolic adjustment is related to the generation of electrical signals after rehydration of the plants. Therefore, the objective of this work was to characterize the electrical signals generated in plants of mutant tomato plants in abscisic acid and to identify the electrophysiological and metabolic changes that are associated with the propagation of electrical signals in response to drought and the rehydration stimulus in these plants. Therefore, the objective of this work was to characterize the electrical signals generated in plants of mutant tomato plants in abscisic acid and to identify the electrophysiological and metabolic changes that are associated with the propagation of electrical signals in response to drought and the rehydration stimulus in these plants. Three independent studies were carried out to evaluate the generation of electrical signals in microtomatoes, cultivar Micro-Tom (MT) of the wild type (MTwt) and of the isogenic mutants MTnotabilis (MTnot) and transgenic MTsp12::NCED (MTNCED). The first study evaluated which electrical signals are spontaneously generated and evoked via electrical stimulus. The second and third studies were carried out to evaluate the effect of water deficit and the rehydration stimulus on gas exchange, metabolism and the generation of action potentials in microtomatoes and also the effect of electrical signals on physiological responses. Spontaneous action potentials were observed more frequently in MTnot compared to MTwt and MTNCED. On the other hand, spontaneous variation potentials occurred more frequently in MTNCED, demonstrating that ABA influences signal propagation. In addition, the plants exposed to water deficit induced an increasing depolarization of the electrical potential of the plasma membrane in MTwt and MTnot, which contributed to the generation of action potentials after the application of the rehydration stimulus. In MTwt, the electrical signal induced an increase in photosynthetic rate, stomatal conductance and transpiration. In contrast, gas exchange traits were reduced in ABA mutants. Additionally, the higher levels of glutamic acid, asparagine and GABA under water deficit may have influenced the induction and propagation of the electrical signal in MTnot.

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Hydro-Electrochemical Integration of the Higher Plant – Basis for Electrogenic Flower Induction

Cited by 4 publications

References 0 publications

Complex relationship between growth and circumnutations inHelianthus annuusstem

Complex relationship between growth and circumnutations inHelianthus annuusstem

Plant neurobiology: from sensory biology, via plant communication, to social plant behavior

Sinais elétricos em microtomateiros mutantes em ABA: aspectos eletrofisiológicos e metabólicos sob diferentes condições hídricas

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