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Hexanoic acid 2-(diethylamino)ethyl ester enhances chilling tolerance in strawberry seedlings by impact on photosynthesis and antioxidants

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Biologia Plantarum

Abstract

Strawberry (Fragaria ananassa Duch.) seedlings were pretreated with hexanoic acid 2-(diethylamino)ethyl ester (DA-6) in concentrations of 0, 10, 20 and 40 mg dm−3 and then subjected to chilling and rewarming. The effects of applied DA-6 on the generation of reactive oxygen species (O2 −, H2O2), lipid peroxidation, proline accumulation and photosynthesis were evaluated. Pretreatment with DA-6 alleviated the inhibition of superoxide dismutase (SOD), catalase (CAT) and ascorbate peroxidase (APX) activities caused by chilling stress thus reducing O2 − and H2O2 production and lipid peroxidation in pretreated plants. DA-6 pretreatment also accelerated accumulation of proline and reduce the decrease in proline content after rewarming. DA-6 pretreatment increases maximum quantum yield of photosystem 2 (Fv/Fm), actual photochemical efficiency of photosystem 2 (ΦPS2), photochemical quenching coefficient (qP) and net photosynthetic rate (PN) and decreases non-photochemical quenching coefficient (qNP) of the seedlings under chilling stress. DA-6 pretreatment also increased the recovery rate of photosynthesis after rewarming.

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Abbreviations

AsA:

ascorbate

APX:

ascorbate peroxidase

CAT:

catalase

DA-6:

hexanoic acid 2-(diethylamino) ethyl ester

Fv/Fm :

variable to maximum chlorophyll fluorescence (maximum quantum yield of photosystem 2)

GSH:

glutathione

MDA:

malondialdehyde

O2 :

superoxide radical

PN :

net photosynthetic rate

PS 2:

photosystem 2

qNP:

non-photochemical quenching coefficient

qP:

photochemical quenching coefficient

ROS:

reactive oxygen species

SOD:

superoxide dismutase

ΦPS2 :

actual photochemical efficiency of PS 2.

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Acknowledgments

This study was supported by the Agriculture Special Fund for the Commonweal Industry of China (No. nyhyzx07-025) and the Qualitative Inspect Special Fund for the Commonweal Industry of China (No. 10-85).

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Authors and Affiliations

  1. College of Agriculture and Biotechnology, China Agricultural University, 100193, Beijing, P.R. China

    X. -J. Fu, A. S. Maimaiti, H. -M. Mou, Q. Yang & G. -J. Liu

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  1. X. -J. Fu
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  2. A. S. Maimaiti
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  3. H. -M. Mou
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  4. Q. Yang
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  5. G. -J. Liu
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Correspondence to G. -J. Liu.

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Fu, X.J., Maimaiti, A.S., Mou, H.M. et al. Hexanoic acid 2-(diethylamino)ethyl ester enhances chilling tolerance in strawberry seedlings by impact on photosynthesis and antioxidants. Biol Plant 55, 793–796 (2011). https://doi.org/10.1007/s10535-011-0190-8

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  • DOI: https://doi.org/10.1007/s10535-011-0190-8

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