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EGTA inhibits floral induction of Pharbitis nil via its influence on gas exchange properties of stomata

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Abstract

The purpose of the study was to determine inhibitory effect of calcium chelator; ethylene glycol-bis(2-aminoethylether)-N,N,N′,N′-tetraacetic acid (EGTA) on flowering of a short-day (SD) plant Pharbitis nil. It was found that 20 mM solution of EGTA applied on cotyledons of 5-d-old P. nil seedlings four hours before the start of 16-h-long induction night decreased the flowering response by 55% compared to the control plants not treated with this Ca2+ chelator. It also caused a very significant decrease of photosynthesis rate, transpiration rate and stomatal conductance both in light and darkness conditions. The results of this study confirm earlier hypothesis suggesting the effect of Ca2+ and its modulators on P. nil flowering is due to their influence on the stomata.

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Abbreviations

EGTA:

ethylene glycol-bis(2-aminoethylether)-N,N,N′,N′-tetraacetic acid

GE:

gas exchange

SD:

short day

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Authors and Affiliations

  1. Department of Plant Physiology and Biotechnology, University of Warmia and Mazury, Oczapowskiego 1a, 10-719, Olsztyn, Poland

    Katarzyna Głowacka & Ryszard Józef Górecki

  2. Department of Biotechnology, Nicolaus Copernicus University, Gagarina 9, 87-100, Toruń, Poland

    Andrzej Tretyn

  3. Division of Applied Life Science and Environmental Biotechnology National Core Research Center, Gyeongsang National University, 660-701, Jinju, Korea

    Katarzyna Głowacka & Sung-Ho Lee

Authors
  1. Katarzyna Głowacka
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  2. Andrzej Tretyn
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  3. Ryszard Józef Górecki
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  4. Sung-Ho Lee
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Corresponding author

Correspondence to Sung-Ho Lee.

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Głowacka, K., Tretyn, A., Górecki, R.J. et al. EGTA inhibits floral induction of Pharbitis nil via its influence on gas exchange properties of stomata. Acta Physiol Plant 28, 477–481 (2006). https://doi.org/10.1007/BF02706631

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  • DOI: https://doi.org/10.1007/BF02706631

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