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Beyond osmolytes and transcription factors: drought tolerance in plants via protective proteins and aquaporins

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  • Published:
Biologia Plantarum

Abstract

Mechanisms of drought tolerance have been studied by numerous groups, and a broad range of molecules have been identified to play important roles. A noteworthy response of stressed plants is the accumulation of novel protective proteins, including heat-shock proteins (HSPs) and late embryogenesis abundant (LEA) proteins. Identification of gene regulatory networks of these protective proteins in plants will allow a wide application of biotechnology for enhancement of drought tolerance and adaptation. Similarly, aquaporins are involved in the regulation of water transport, particularly under abiotic stresses. The molecular and functional characterization of protective proteins and aquaporins has revealed the significance of their regulation in response to abiotic stresses. Herein, we highlight new findings regarding the action mechanisms of these proteins. Finally, this review also surveys the current advances in engineering drought tolerant plants, particularly the engineering of protective proteins (sHSPs and LEA) and aquaporins for imparting drought stress tolerance in plants.

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Abbreviations

ABA:

abscisic acid

HSPs:

heat-shock proteins

LEA:

late embryogenesis abundant

MIPs:

major intrinsic proteins

PIPs:

plasma membrane intrinsic proteins

TIPs:

tonoplast intrinsic proteins

WUE:

water use efficiency

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Acknowledgement

This work was supported by Higher Education Commission (HEC) of Pakistan by a project grant to SSH.

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Authors and Affiliations

  1. Institute for Molecular Physiology and Biotechnology of Plants, University of Bonn, Kirschallee 1, D-53115, Bonn, Germany

    S. S. Hussain & M. T. Iqbal

  2. Institute for Genetics, Heinrich-Heine-University Düsseldorf, Universitätsstr. 1, D-40225, Düsseldorf, Germany

    M. A. Arif

  3. Institute of Horticultural Sciences, University of Agriculture, Faisalabad, 38040, Pakistan

    M. Amjad

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  1. S. S. Hussain
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  2. M. T. Iqbal
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  3. M. A. Arif
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Correspondence to S. S. Hussain.

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Hussain, S.S., Iqbal, M.T., Arif, M.A. et al. Beyond osmolytes and transcription factors: drought tolerance in plants via protective proteins and aquaporins. Biol Plant 55, 401–413 (2011). https://doi.org/10.1007/s10535-011-0104-9

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