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Photochemical activity in Dalbergia nigra (Vell.) Fr. Allem. seedlings submitted to water deficit

Author

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  • Natiele SANDRINI CELOVANE

    (Departamento de Ciências Agrárias e Biológicas, Centro Universitário Norte do Espírito Santo, Universidade Federal do Espírito Santo, São Mateus, Brazil)

  • Jadson BONINI ZAMPIROLLO

    (Departamento de Ciências Agrárias e Biológicas, Centro Universitário Norte do Espírito Santo, Universidade Federal do Espírito Santo, São Mateus, Brazil)

  • Thais SILVA COSTA

    (Departamento de Ciências Agrárias e Biológicas, Centro Universitário Norte do Espírito Santo, Universidade Federal do Espírito Santo, São Mateus, Brazil)

  • Clodoaldo LEITES PINHEIRO

    (Embrapa Pecuária Sul, Bagé, Brazil)

  • Diolina MOURA SILVA

    (Departamento de Ciências Biológicas, Centro de Ciências Humanas e Naturais, Universidade Federal do Espírito Santo, Vitória, Brazil)

  • Elisa MITSUKO AOYAMA

    (Departamento de Ciências Agrárias e Biológicas, Centro Universitário Norte do Espírito Santo, Universidade Federal do Espírito Santo, São Mateus, Brazil)

  • Antelmo RALPH FALQUETO

    (Departamento de Ciências Agrárias e Biológicas, Centro Universitário Norte do Espírito Santo, Universidade Federal do Espírito Santo, São Mateus, Brazil)

Abstract

In this study, we evaluated the influence of the daily variation of both intensity of photosynthetically active radiation (PAR) and temperature on chlorophyll a fluorescence parameters in Jacarandá-da-Bahia seedlings submitted to two treatments: T1 (control) and T2 (water deficit during seven days). It was used seedling with approximately 90 days old cultivated in plastic pots contend soil. After 45 days of acclimation, the treatments were applied. In T2, the water deficit was applied by total suspension of irrigation. The physiological evaluations were made a long of the day (from 6 a.m. to 6 p.m.). The water deficit caused a significant reduction of the maximal fluorescence and in area below the fluorescence curve. Furthermore, the water deficit improved the effects of the high temperature and PAR on the energetic connectivity (or grouping between photosystem II units) and of oxygen-evolving complex (OEC) stability, evidenced by the high and positive values of L-band and K-band in those daytimes with higher incidence. Finally, the effects of water deficit were more evident on the OEC stability.

Suggested Citation

  • Natiele SANDRINI CELOVANE & Jadson BONINI ZAMPIROLLO & Thais SILVA COSTA & Clodoaldo LEITES PINHEIRO & Diolina MOURA SILVA & Elisa MITSUKO AOYAMA & Antelmo RALPH FALQUETO, 2018. "Photochemical activity in Dalbergia nigra (Vell.) Fr. Allem. seedlings submitted to water deficit," Journal of Forest Science, Czech Academy of Agricultural Sciences, vol. 64(10), pages 409-415.
    • Handle: RePEc:caa:jnljfs:v:64:y:2018:i:10:id:71-2018-jfs
    DOI: 10.17221/71/2018-JFS
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    References listed on IDEAS

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    1. Strasser, Reto J. & D. Stirbet, Alexandrina, 1998. "Heterogeneity of photosystem II probed by the numerically simulated chlorophyll a fluorescence rise (O–J–I–P)," Mathematics and Computers in Simulation (MATCOM), Elsevier, vol. 48(1), pages 3-9.
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