Physiology of Movement

Haupt, Wolfgang; Seitz, Konrad

doi:10.1007/978-3-642-69985-6_11

Cited by 5 publications

(2 citation statements)

References 40 publications

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“…At least two types of responses can occur when the cytoplasmic Ca^^ concentration changes (Fig, 1), the transient and the long-lived (Hepler & Wayne, 1985), Transient responses usually depend more or less directly on the actual Ca^^ concentration, an example of this being the action potential-induced, Ca^ +-mediated, cessation of cytoplasmic streaming (Simons, 1981;Williamson & Ashley, 1982;Kikuyama & Tazawa, 1983;Beilby, 1984;Beilby & MacRobbie, 1984;Haupt & Seitz, 1984), Some of the long-lived responses may be triggered by Ca^^/calmodulin-mediated events involving activation of protein kinases or phosphatases which in turn phosphorylate or dephosphorylate a wide variety of proteins (Hetherington & Trewavas, 1982Salimath & Marme, 1983;Dieter, 1984;Polya, Schibeci & Micucci, 1984;Veluthambi & Poovaiah, 1984). Long-lived responses might also be modulated via a different Ca^^ effect, perhaps wound-induced (Theologis & Laties, 1980, on membrane phosphohpids, involving phosphoinositol and relatives, and this may comprise a signalling mechanism equal in importance to that of calmodulin (Nishizuka, 1983;Joseph, 1984;Fisher, Van Rooijen, & Agranoff, 1984;Majerus et al, 1985;Morre et al, 1984), Other Ca^^-mediated processes, especially those involving the cytoskeleton, might include both short-and long-term components.…”

Section: Ca^"^ Influxmentioning

confidence: 99%

Action potentials as multifunctional signals in plants: a unifying hypothesis to explain apparently disparate wound responses

Davies

1987

Plant Cell & Environment

170

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I suggest that action potentials, which occur in most, if not all, plants, play a major role in intercellular and intracellular communication. Longdistance communication is achieved through the transmitted changes in membrane potential, whereas local signalling is achieved through changes in the subcellular localization of ions (K"^, CP, and Ca^"^) and of water, and perhaps by membrane depolarization and current flow. These local changes in ion concentration can lead to modified activities of enzymes in the cell wall (e.g. pectinase), the plasma membrane (e.g. cellulose synthetase, callose synthetase), and the cytoplasm (e.g. protein kinase). In particular, the elevated concentration of cytoplasmic Ca^^ is shown to have a major, yet complex, role, especially in the modulation of translation. I suggest further that, in addition to their role in wounding, action potentials may also be important signalling mechanisms for chilling injury, mechanical perturbation and invasion by pathogens, as well as for light and gravity

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Section: Ca^"^ Influxmentioning

confidence: 99%

Action potentials as multifunctional signals in plants: a unifying hypothesis to explain apparently disparate wound responses

Davies

1987

Plant Cell & Environment

170

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“…Free-living animals often engage in behaviour that involves intense activity or high rates of workload, for instance, reproduction (Lemon, 1993;Noren, 2008;Williams and Vézina, 2001), foraging (Haupt and Seitz, 1984;Maurer, 1996), thermoregulation (Bicego et al, 2007;Swanson, 2010;Weathers, 1981) and migration (Piersma, 2011;Wikelski et al, 2003;Yap et al, 2017a). These activities are predicted to be energetically expensive, and therefore, animals engaged in these activities would be predicted to have high daily energy expenditure.…”

Section: Introductionmentioning

confidence: 99%

Sex-specific energy management strategies in response to training for increased foraging effort prior to reproduction in captive zebra finches

Yap

Powers

Vermette

et al. 2021

Journal of Experimental Biology

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Free-living animals often engage in behaviour that involve high rates of workload and result in high daily energy expenditure (DEE), such as reproduction. However, the evidence for elevated DEE accompanying reproduction remain equivocal. In fact, many studies have found no difference in DEE between reproducing vs. non-reproducing females. One of the hypotheses explaining the lack of difference is the concept of energetic ceiling. However, it is unclear whether the lack of increases in energy expenditure is due to the existence of an energetic ceiling and/or compensation by males during parental care. To investigate whether an energetic ceiling exists we experimentally manipulated foraging effort in captive zebra finches, Taeniopygia guttata, creating two groups with high- and low foraging effort followed by both groups breeding in a low foraging effort common garden condition. DEE was measured in both sexes throughout the experiment. Our findings showed sex-specific energy management strategies in response to training for increased foraging effort prior to reproduction. Specifically, males and females responded differently to high foraging effort treatment and subsequently to chick rearing in terms of energy expenditure. Our results also suggested that there appears to be an energetic ceiling in females and that energetic costs incurred prior to reproduction can be carried over into subsequent stages of reproduction in a sex-specific manner.

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After-Effects of Vectorial Photo-Excitation in Solar-Tracking Leaves of Lavatera cretica L. — A Kinetic Analysis

Koller

Cohen

1989

Journal of Plant Physiology

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Physiology of Movement

Cited by 5 publications

References 40 publications

Action potentials as multifunctional signals in plants: a unifying hypothesis to explain apparently disparate wound responses

Action potentials as multifunctional signals in plants: a unifying hypothesis to explain apparently disparate wound responses

Sex-specific energy management strategies in response to training for increased foraging effort prior to reproduction in captive zebra finches

After-Effects of Vectorial Photo-Excitation in Solar-Tracking Leaves of Lavatera cretica L. — A Kinetic Analysis

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