Twilight Effect: Initiating Dark Measurement in Photoperiodism of <i>Xanthium</i>

Salisbury, Frank B.

doi:10.1104/pp.67.6.1230

Cited by 40 publications

(25 citation statements)

References 16 publications

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“…The flowering time of PGMR and its original line equally delayed for about 7 days relative to SD controls, and the percentage of flowering inhibition by FR was 11.1% and 10.3%, respectively. This is consistent with previous reports that EOD FR inhibited flowering in several SDPs, including Chenopodium rubrum (King and Cumming 1972), Pharbitis nil (Takimoto and Hamner 1965) and Xanthium strumarium (Salisbury 1981 Data are means from two independent experiments (5 replica). A, floret number.…”

supporting

confidence: 91%

Effect of End-of-day far-red light exposures on fertility alteration and flowering in photoperiod-sensitive genic male-sterile rice

Wang

1998

J. Plant Res.

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The rice photoperiod-sensitive genic male-sterile mutant (PGMR) is sterile under long days, but fertile in short days. Phytochrome is involved in the photoperiod-induced malesterile process. To investigate the mechanisms of phytochrome action in PGMR, end-of-day (EOD) experiments were carried ouL Flowering in PGMR was delayed considerably by EOD far-red light exposures following a short day of 10 hr, whereas its fertility decreased to the same extent as the original line. This result suggests that photoperiod response mediating fertility alteration in PGMR somewhat differed from that in flowering, i.e., fertility alteration and flowering might be under the separate phytochrome signaling control.

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supporting

confidence: 91%

Effect of End-of-day far-red light exposures on fertility alteration and flowering in photoperiod-sensitive genic male-sterile rice

Wang

1998

J. Plant Res.

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“…The first obvious case to consider is our own moon. The photon flux density received on the Earth from our moon is estimated to be 0.5 nmol photon m −2 s −1 (Munz and McFarland 1973), 3 nmol photon m −2 s −1 (Salisbury 1981) and 5 nmol photon m −2 s −1 (Gorbunov and Falkowski 2002). Subsequent estimates are 3 nmol photon m −2 s −1 (Johnsen et al 2006) and 12 nmol photon m −2 s −1 (Cummings et al 2008).…”

Section: Photosynthesis Induced By Moonlightmentioning

confidence: 96%

Planetary targets in the search for extrasolar oxygenic photosynthesis

Cockell

Raven

Kaltenegger

et al. 2009

Plant Ecology & Diversity

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Background:In the coming decades space telescopes will be constructed that will attempt to find the gaseous products of oxygenic photosynthesis, the most promising biosignatures of life, in the atmospheres of temperate Earth-like planets orbiting distant stars. Aims: This paper aims to provide a synthesis of the range of feasible targets -either planets or their satellites -that could harbour photosynthesis. Methods: We calculated photosynthetically active radiation (PAR) fluxes on a diversity of planetary bodies including those receiving direct light from a single star, similarly to the Earth, and investigated the potential of these fluxes to support photosynthesis. Results: All main sequence stars emit radiation that is capable of supporting photosynthesis on Earth-like planets. We discuss tidally-locked M star planets as a special case. Less conventional targets for searches include large moons orbiting gas giant planets, which receive reflected light from their host planets and from the host star, planets in stable orbits in binary star systems, and the search for two planets within the same star system with photosynthetic signatures. Conclusions: A diversity of planetary bodies are targets in the search for extrasolar photosynthesis. The demonstration that many or none of these candidate planetary bodies harbour photosynthesis would be an important conclusion in understanding the evolution and prevalence of photosynthesis.

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“…Similarly, the ratio of UV to PAR is highest near noon. There is some enrichment of FR relative to R at twilight (Salisbury, 1981). Spatially, UV:PAR ratios are typically higher at low latitudes.…”

Section: Light As An Environmental Variablementioning

confidence: 99%

Seduced by the dark side: integrating molecular and ecological perspectives on the influence of light on plant defence against pests and pathogens

2006

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Contents Summary 677 Introduction 678 Light as an environmental variable 678 Long‐term effects of light on plant–herbivore or plant–pathogen interactions 679 Mechanisms of responses to the light environment: the whole‐plant perspective 684 Short‐term responses to the light environment: induced defences 686 Mechanisms for light‐dependent induced defences 688 Interpreting interactions between light and defence responses 690 Acknowledgements 693 References 693 Summary Plants frequently suffer attack from herbivores and microbial pathogens, and have evolved a complex array of defence mechanisms to resist defoliation and disease. These include both preformed defences, ranging from structural features to stores of toxic secondary metabolites, and inducible defences, which are activated only after an attack is detected. It is well known that plant defences against pests and pathogens are commonly affected by environmental conditions, but the mechanisms by which responses to the biotic and abiotic environments interact are only poorly understood. In this review, we consider the impact of light on plant defence, in terms of both plant life histories and rapid scale molecular responses to biotic attack. We bring together evidence that illustrates that light not only modulates defence responses via its influence on biochemistry and plant development but, in some cases, is essential for the development of resistance. We suggest that the interaction between the light environment and plant defence is multifaceted, and extends across different temporal and biological scales.

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Twilight Effect: Initiating Dark Measurement in Photoperiodism of Xanthium

Cited by 40 publications

References 16 publications

Effect of End-of-day far-red light exposures on fertility alteration and flowering in photoperiod-sensitive genic male-sterile rice

Effect of End-of-day far-red light exposures on fertility alteration and flowering in photoperiod-sensitive genic male-sterile rice

Planetary targets in the search for extrasolar oxygenic photosynthesis

Seduced by the dark side: integrating molecular and ecological perspectives on the influence of light on plant defence against pests and pathogens

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