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Photosynthesis Research

, Volume 139, Issue 1–3, pp 307–323 | Cite as

Impact of weak water deficit on growth, photosynthetic primary processes and storage processes in pine and spruce seedlings

  • Ilya E. Zlobin
  • Yury V. IvanovEmail author
  • Alexander V. Kartashov
  • Boris A. Sarvin
  • Andrey N. Stavrianidi
  • Vladimir D. Kreslavski
  • Vladimir V. Kuznetsov
Original Article

Abstract

We investigated the influence of 40 days of drought on growth, storage processes and primary photosynthetic processes in 3-month-old Scots pine and Norway spruce seedlings growing in perlite culture. Water stress significantly affected seedling water status, whereas absolute dry biomass growth was not substantially influenced. Water stress induced an increase in non-structural carbohydrate content (sugars, sugar alcohols, starch) in the aboveground part of pine seedlings in contrast to spruce seedlings. Due to the relatively low content of sugars and sugar alcohols in seedling organs, their expected contribution to osmotic potential changes was quite low. In contrast to biomass accumulation and storage, photosynthetic primary processes were substantially influenced by water shortage. In spruce seedlings, PSII was more sensitive to water stress than PSI. In particular, electron transport in PSI was stable under water stress despite the substantial decrease of electron transport in PSII. The increase in thermal energy dissipation due to enhancement of non-photochemical quenching (NPQ) was evident in both species under water stress. Simultaneously, the yields of non-regulated energy dissipation in PSII were decreased in pine seedlings under drought. A relationship between growth, photosynthetic activities and storage processes is analysed under weak water deficit.

Keywords

Scots pine Norway spruce Drought Photosystem I Photosystem II Non-structural carbohydrates 

Abbreviations

ETC

Electron transport chain

NPQ

Non-photochemical quenching

NSC

Non-structural carbohydrates

PSI

Photosystem I

PSII

Photosystem II

PTOX

Plastoquinol terminal oxidases

ROS

Reactive oxygen species

RWC

Relative water content

WHC

Water-holding capacity

Notes

Acknowledgements

This work was supported by the Russian Science Foundation (Project No. 16-14-10224). We are grateful to Dr. Eugene A. Lysenko for assistance in obtaining data on chlorophyll fluorescence parameters. We are grateful to Prof. A.M. Nosov and Dr. D.V. Kochkin for their support and valuable advice regarding the analysis of sugars.

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© Springer Science+Business Media B.V., part of Springer Nature 2018

Authors and Affiliations

  1. 1.Timiryazev Institute of Plant PhysiologyRussian Academy of SciencesMoscowRussia
  2. 2.Moscow State UniversityMoscowRussia
  3. 3.Institute of Basic Biological ProblemsRussian Academy of SciencesPushchinoRussia
  4. 4.Tomsk State UniversityTomskRussia

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