scholarly journals Labile phytochrome and photoperiodic flower induction in Pharbitis nil Chois. The irreversible phytochrome hypothesis

2014 ◽  
Vol 63 (3-4) ◽  
pp. 275-278 ◽  
Author(s):  
Mariusz Cymerski ◽  
Jan Kopcewicz
Keyword(s):  
Light Pulse ◽  
White Light ◽  
Red Light ◽  
Flower Induction ◽  
Pharbitis Nil ◽  
Photoperiodic Control ◽  
Inhibiting Effect ◽  
Long Period ◽  
Photoperiodic Flower Induction

Seedlings of <i>Pharbitis nil</i> cultivated under non-inductive conditions of white light were subjected to generative induction applying one 16-hour-long period of inductive night. During the eighth hour the night was interrupted with 1 min of red light pulse which completely inhibited the flowering. Treating the plants with KCN blocked the inhibiting effect of red light. Because KCN lowers considerably the rate of destruction of labile Pfd in some plant systems, it seems probable that red light night-break irradiation (without KCN), which blocked the flowering, leads also to the accumulation of unknown Pfd destruction products (irreversible phytochrome). It also suggests that it is not the labile PfrI itself but the products of its irreversible transformation that could be active in the photoperiodic control of flowering.

The Involvement of Cyclic ADPR in Photoperiodic Flower Induction of Pharbitis nil

2006 ◽  
Vol 25 (3) ◽  
pp. 233-244 ◽  
Author(s):  
Adriana Szmidt-Jaworska ◽  
Krzysztof Jaworski ◽  
Jan Kopcewicz
Keyword(s):  
Flower Induction ◽  
Pharbitis Nil ◽  
Photoperiodic Flower Induction

The involvement of cyclic GMP in the photoperiodic flower induction of Pharbitis nil

2004 ◽  
Vol 161 (3) ◽  
pp. 277-284 ◽  
Author(s):  
Adriana Szmidt-Jaworska ◽  
Krzysztof Jaworski ◽  
Andrzej Tretyn ◽  
J.a.n. Kopcewicz
Keyword(s):  
Cyclic Gmp ◽  
Flower Induction ◽  
Pharbitis Nil ◽  
Photoperiodic Flower Induction

scholarly journals Involvement of aba in flower induction of Pharbitis nil

2011 ◽  
Vol 80 (1) ◽  
pp. 21-26 ◽  
Author(s):  
Emilia Wilmowicz ◽  
Kamil Frankowski ◽  
Paulina Glazińska ◽  
Jacek Kęsy ◽  
Jan Kopcewicz
Keyword(s):  
Abscisic Acid ◽  
Red Light ◽  
Inhibitory Effect ◽  
Flower Induction ◽  
Pharbitis Nil ◽  
Endogenous Abscisic Acid ◽  
Flower Inhibition ◽  
Aba Content ◽  
Floral Bud

<p>Flowering of plants is controlled by hormones among which both stimulators and inhibitors are present. The role of abscisic acid (ABA) in flower induction of the short day plant <em>Pharbitis nil</em> was shown in our experiments through exogenous applications and endogenous level determination of the hormone in cotyledons of seedlings grown under special light conditions.</p><p>The application of ABA to cotyledons or shoot apices during the first half of a 24-h long inductive night inhibits flowering. The same compound applied towards the end of or after a 14-h long subinductive night increases the number of flower buds produced by these plants.</p><p>Exposing <em>P. nil</em> seedlings at the beginning of a 24-h long inductive night to far red light (FR) decreases the level of endogenous abscisic acid in cotyledons and leads to flower inhibition. However, a pulse of red light (R) reversing the inhibitory effect of far red light on the flowering of <em>P. nil</em> increases the ABA content.</p><p>The results obtained confirm previous observations that ABA may play a dual and an important role in the regulation of floral bud formation in <em>P. nil</em>. The flowering occurs when the level of endogenous abscisic acid is low at the beginning and is high toward the end of the inductive night.</p>

scholarly journals The level of phyA in Pharbitis nil Chois during the photoperiodic flower induction

2014 ◽  
Vol 69 (4) ◽  
pp. 269-272 ◽  
Author(s):  
Adriana Szmidt-Jaworska ◽  
Krzysztof Jaworski ◽  
Jan Kopcewicz
Keyword(s):  
Dark Period ◽  
Polyclonal Antibodies ◽  
Flower Induction ◽  
Pharbitis Nil ◽  
Light Illumination ◽  
Direct Control ◽  
Short Day ◽  
Rapid Destruction ◽  
Photoperiodic Flower Induction

The aim of this work was to determine if there is any relationship between an endogenous phyA level and photoperiodic flower induction. The level of phyA was characterised with polyclonal antibodies directed to phyA from pea. At first it was detected that phyA level is predominant in cotyledons, whereas in roots and stems the concentration of labile phytochrome is rather low. So cotyledons were used for later experiments. In these cotyledons exposed to light illumination a rapid destruction of phyA has been observed. The loss of extractable phyA chromoprotein occurs already after 60 min of irradiation. <em>Pharbitis nil</em> is a short-day plant and a single 16-hours-long dark period is fully inductive. We assessed that phyA level is extremely low during a long inductive night and an immunodetectable phytochrome appears only after 24 hours of darkness. The obtained results suggest that labile phytochrome is not taking part in the direct control of the photoperiodic flower induction.

scholarly journals The ecological hazard of artificial lighting in greenhouses

2019 ◽  
Vol 11 (3) ◽  
pp. 87
Author(s):  
Marian Gilewski
Keyword(s):  
Hong Kong ◽  
Flower Induction ◽  
Pharbitis Nil ◽  
Light Sources ◽  
International Conference ◽  
Calcium Dependent ◽  
Dependent Protein ◽  
Photoperiodic Flower Induction ◽  
Guanylyl Cyclase Activity

This article draws attention to the shortcomings of modern lighting systems used in greenhouses. Its content focuses on the negative effects of mismatches between the photosynthetic needs of plants and the parameters of artificial light sources. Greenhouse lamps designers often do not have the knowledge of biological cultivation dependencies. Therefore, their cooperation with specialists of plant physiology and gardeners is indispensable. This is important because it can affect the consumer quality of vegetables. Full Text: PDF ReferencesM.Kucharczyk, I.Gąsak, Ecological effects of light pollution , III International Conference on Scientific and Technical TRANSEIA, Krynica Zdrój, Poland, 6-8 December 2017. DirectLink T. H. Goldsmith, What Birds See, Scientific American Inc. (2006), CrossRef E.J. Gerl, M.R. Morris, The Causes and Consequences of Color Vision, Springer Science + Business Media, LLC, 2008. CrossRef K. Jaworski, A. Szmidt-Jaworska, J. Kopcewicz, Two calcium dependent protein kinases are differently regulated by light and have different activity patterns during seedling growth in Pharbitis nil, open access at Springerlink.com, Journal: 10725, Article: 9609, 2011. CrossRef K. Jaworski, A. Pawełek, J. Kopcewicz, A. Szmidt-Jaworska, The calcium-dependent protein kinase (PnCDPK1) is involved in Pharbitis nil flowering, Journal of Plant Physiology 169 p. 1578-1585, 2012. CrossRef A. Szmidt-Jaworska, K. Jaworski, J. Kopcewicz, Effect of light on soluble guanylyl cyclase activity in Pharbitis nil seedlings, Journal of Photochemistry and Photobiology B: Biology 93 p. 9-15, 2008. CrossRef Horticulture Lighting Group, Goniophotometer Test Report of the ELITE ECO lamp CrossRef K. Marra, E. P. LaRochelle, M. S. Chapman, P. J. Hoopes, K. Lukovits, E. V. Maytin, T. Hasan, B. W. Pogue, Comparison of Blue and White Lamp Light with Sunlight for Daylight‐Mediated, 5‐ALA Photodynamic Therapy, in vivo, Wiley Online Library, 16 April 2018 CrossRef M. Gilewski, The Ecological Harmfulness of RGB LED Light, International Conference on Energy, Power, Electrical and Environmental Engineering : EPEEE 2018, DEStech Publications, Wuhan, Hong Kong, September 27-28, 2018. CrossRef K. J. McCree, The Action Spectrum, Absorptance and Quantum Yield of Photosynthesis in Crop Plants, Agricultural Meteorology, Elsevier Publishing Company, 9 p. 191-216 , 1972. CrossRef EconoLux Indastries Ltd., What Light do Plants Need, Hong Kong CrossRef I. Ashdown, Photometry and Photosynthesis: From Photometry to PPFD, SunTracker Technologies Ltd CrossRef OSRAM Opto Semiconductors, Horticulture Lighting with LEDs, OS SSL | NR AW CH, November 2016 CrossRef M. Mottus, M. Sulev, F. Baret, R. Lopez-Lozano, A. Reinart, Photosynthetically Active Radiation: Measurement and Modeling CrossRef Heliospectra AB, Full Flexibility ELIXIA grow ligh CrossRef Heliospectra AB, Full Flexibility ELIXIA grow light CrossRef A. Szmidt-Jaworska1, K. Jaworski1, A. Tretyn, J. Kopcewicz, The involvement of cyclic GMP in the photoperiodic flower induction of Pharbitis nil, J. Plant Physiol. 161. p. 277-284, 2004. CrossRef A. Szmidt-Jaworska, K. Jaworski, J. Kopcewicz, The Involvement of Cyclic ADPR in Photoperiodic Flower Induction of Pharbitis nil, J Plant Growth Regul 25: p. 233-244, 2006. CrossRef A. Szmidt-Jaworska, K. Jaworski, A. Zienkiewicz, M. Lenartowska, J. Kopcewicz, Guanylyl cyclase activity during photoperiodic flower induction in Pharbitis nil, Plant Growth Regul 57: p. 173-184, 2009. CrossRef U.J. Błaszczak, D.A. Aziz, L. Gryko, Influence of the spectral composition of LED lighting system on plants cultivation in a darkroom, Proceedings of SPIE, vol. 10445, (2017) 1-9. CrossRef L. Gryko, U. Blaszczak, A.S. Zajac, Colorimetric characterization of the tunable LED-based light source at the output of the homogenizing rod, Proceedings of SPIE, vol. 10808, 2018. CrossRef I.Fryc, T. Dimitrova-Grekow, An automated system for evaluation of the quality of light sources, 6th IEEE Lighting Conference of the Visegrad Countries : LUMEN V4, Karpacz, September 13-16, 2016. CrossRef J. Kusznier, M. Zajkowski, L. Budzynski, D. Tyniecki, Ring optical mixer for LED with truncated surfaces, Proceedings of SPIE, vol. 10325, 2017. CrossRef W. Wojtkowski, LED Power Supply with Thermal Protection for Automotive Application, 7th Lighting Conference of the Visegrad Countries : LUMEN V4, Třebíč, September 18-20, 2018. CrossRef W. Wojtkowski, Constant Frequency Operation of the Parallel Loaded Resonant DC/DC Converter for Power LED Lighting, International Conference on Energy, Power, Electrical and Environmental Engineering : EPEEE 2018, DEStech Publications, Wuhan, Hong Kong, September 27-28, 2018. CrossRef Pashiardis S, Kalogirou SA and Pelengaris A. Characteristics of Photosynthetic Active Radiation (PAR) Through Statistical Analysis at Larnaca, Cyprus. SM J Biometrics Biostat. 2(2): 1009, 2017. DirectLink R. Inger, J. Bennie, T. W. Davies, K. J. Gaston, Potential Biological and Ecological Effects of Flickering Artificial Light, PLoS One, vol. 9(5) (2014) PMC4038456 CrossRef C. Dong, Y. Fu, G. Liu, H. Liu, "Growth, photosynthetic characteristics, antioxidant capacity and biomass yield and quality of wheat (Triticum aestivum L.) exposed to LED light sources with different spectra combinations", J Agron Crop Sci, vol. 200, p. 219-230, 2014. CrossRef

Ethylene, auxin, and abscisic acid interactions in the control of photoperiodic flower induction in Pharbitis nil

2014 ◽  
Vol 58 (2) ◽  
pp. 305-310 ◽  
Author(s):  
K. Frankowski ◽  
E. Wilmowicz ◽  
A. Kucko ◽  
J. Kesy ◽  
B. Swiezawska ◽  
...  
Keyword(s):  
Abscisic Acid ◽  
Flower Induction ◽  
Pharbitis Nil ◽  
Photoperiodic Flower Induction

Gibberellins are not essential for photoperiodic flower induction of Pharbitis nil

1996 ◽  
Vol 97 (2) ◽  
pp. 397-401 ◽  
Author(s):  
Kiyotoshi Takeno ◽  
Tomohiro Tsuruta ◽  
Takahide Maeda
Keyword(s):  
Flower Induction ◽  
Pharbitis Nil ◽  
Photoperiodic Flower Induction

Guanylyl cyclase activity during photoperiodic flower induction in Pharbitis nil

2008 ◽  
Vol 57 (2) ◽  
pp. 173-184 ◽  
Author(s):  
Adriana Szmidt-Jaworska ◽  
Krzysztof Jaworski ◽  
Agnieszka Zienkiewicz ◽  
Marta Lenartowska ◽  
Jan Kopcewicz
Keyword(s):  
Guanylyl Cyclase ◽  
Flower Induction ◽  
Cyclase Activity ◽  
Pharbitis Nil ◽  
Photoperiodic Flower Induction ◽  
Guanylyl Cyclase Activity
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