4.8 Article

Role of Ethylene and Its Cross Talk with Other Signaling Molecules in Plant Responses to Heavy Metal Stress

Journal

PLANT PHYSIOLOGY
Volume 169, Issue 1, Pages 73-84

Publisher

AMER SOC PLANT BIOLOGISTS
DOI: 10.1104/pp.15.00663

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Funding

  1. Vietnam National University [C2014-28-07]
  2. University Grants Commission, New Delhi [F.40-3(M/S)/2009, SA-III/MANF]

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Excessive heavy metals (HMs) in agricultural lands cause toxicities to plants, resulting in declines in crop productivity. Recent advances in ethylene biology research have established that ethylene is not only responsible for many important physiological activities in plants but also plays a pivotal role in HM stress tolerance. The manipulation of ethylene in plants to cope with HM stress through various approaches targeting either ethylene biosynthesis or the ethylene signaling pathway has brought promising outcomes. This review covers ethylene production and signal transduction in plant responses to HM stress, cross talk between ethylene and other signaling molecules under adverse HM stress conditions, and approaches to modify ethylene action to improve HM tolerance. From our current understanding about ethylene and its regulatory activities, it is believed that the optimization of endogenous ethylene levels in plants under HM stress would pave the way for developing transgenic crops with improved HM tolerance.

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