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Physiological adaptive mechanisms of plants grown in saline soil and implications for sustainable saline agriculture in coastal zone

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Abstract

There is large area of saline abandoned and low-yielding land distributed in coastal zone in the world. Soil salinity which inhibits plant growth and decreases crop yield is a serious and chronic problem for agricultural production. Improving plant salt tolerance is a feasible way to solve this problem. Plant physiological and biochemical responses under salinity stress become a hot issue at present, because it can provide insights into how plants may be modified to become more tolerant. It is generally known that the negative effects of soil salinity on plants are ascribed to ion toxicity, oxidative stress and osmotic stress, and great progress has been made in the study on molecular and physiological mechanisms of plant salinity tolerance in recent years. However, the present knowledge is not easily applied in the agronomy research under field environment. In this review, we simplified the physiological adaptive mechanisms in plants grown in saline soil and put forward a practical procedure for discerning physiological status and responses. In our opinion, this procedure consists of two steps. First, negative effects of salt stress are evaluated by the changes in biomass, crop yield and photosynthesis. Second, the underlying reasons are analyzed from osmotic regulation, antioxidant response and ion homeostasis. Photosynthesis is a good indicator of the harmful effects of saline soil on plants because of its close relation with crop yield and high sensitivity to environmental stress. Particularly, chlorophyll a fluorescence transient has been accepted as a reliable, sensitive and convenient tool in photosynthesis research in recent years, and it can facilitate and enrich photosynthetic research under field environment.

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Abbreviations

ABA:

Abscisic acid

AsA:

Ascorbate

APX:

Ascorbate peroxidase

CAT:

Catalase

DHAR:

Dehydroascorbate reductase

GPXs:

Glutathione peroxidases

GR:

Glutathione reductase

GSH:

Glutathione

H2O2 :

Hydrogen peroxide

MDA:

Malondialdehyde

MDAR:

Monoascorbate reductase

O2 :

Superoxide anion radical

–OH:

Hydroxyl radical

PSI:

Photosystem I

PSII:

Photosystem II

ROS:

Reactive oxygen species

SOD:

Superoxide dismutase

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Acknowledgments

This work was jointly supported by National Natural Science Foundation of China (No. 41201292; 41171216; 41001137; 31100313), One Hundred-Talent Plan of Chinese Academy of Sciences (CAS), the Opening Foundation of the State Key Laboratory of Crop Biology, Shandong Agriculture University (2011KF02), the Project of Shandong Provincial Technology Development plan (2010GSF10208), the CAS/SAFEA International Partnership Program for Creative Research Teams, the Science and Technology Development Plan of Yantai City (2011016), CAS VISITING PROFESSORSHIP (2012T1Z0010), The Strategic Priority Research Program of the Chinese Academy of Sciences (XDA01020304), Yantai Double hundred High-end Talent Plan (XY-003-02) and 135 Development Plan of YIC-CAS.

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Correspondence to Hongbo Shao.

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Communicated by A. K. Kononowicz.

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Yan, K., Shao, H., Shao, C. et al. Physiological adaptive mechanisms of plants grown in saline soil and implications for sustainable saline agriculture in coastal zone. Acta Physiol Plant 35, 2867–2878 (2013). https://doi.org/10.1007/s11738-013-1325-7

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  • DOI: https://doi.org/10.1007/s11738-013-1325-7

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