J Integr Plant Biol. ›› 2021, Vol. 63 ›› Issue (1): 102-125.DOI: 10.1111/jipb.13028

Special Issue: Development Abiotic stress Crop yield Hormone signaling Grain quality

• Invited Expert Reviews • Previous Articles     Next Articles

Ethylene signaling in rice and Arabidopsis: New regulators and mechanisms

He Zhao1 , Cui-Cui Yin1 , Biao Ma2*, Shou-Yi Chen1 and Jin-Song Zhang1,3*   

  1. 1 State Key Lab of Plant Genomics, Institute of Genetics & Developmental Biology, Innovation Academy for Seed Design, Chinese Academy of Sciences, Beijing 100101, China
    2 Biology and Agriculture Research Center, School of Chemistry and Biological Engineering, University of Science and Technology Beijing, Beijing 100024, China
    3 College of Advanced Agricultural Sciences, University of Chinese Academy of Sciences, Beijing 100049, China

    *Correspondences: Biao Ma (mabiao@ustb.edu.cn); Jin-Song Zhang (jszhang@genetics.ac.cn)
  • Received:2020-08-06 Accepted:2020-10-21 Online:2020-10-23 Published:2021-01-01

Abstract: Ethylene is a gaseous hormone which plays important roles in both plant growth and development and stress responses. Based on studies in the dicot model plant species Arabidopsis, a linear ethylene signaling pathway has been established, according to which ethylene is perceived by ethylene receptors and transduced through CONSTITUTIVE TRIPLE RESPONSE 1 (CTR1) and ETHYLENE‐INSENSITIVE 2 (EIN2) to activate transcriptional reprogramming. In addition to this canonical signaling pathway, an alternative ethylene receptor‐mediated phosphor‐relay pathway has also been proposed to participate in ethylene signaling. In contrast to Arabidopsis, rice, a monocot, grows in semiaquatic environments and has a distinct plant structure. Several novel regulators and/or mechanisms of the rice ethylene signaling pathway have recently been identified, indicating that the ethylene signaling pathway in rice has its own unique features. In this review, we summarize the latest progress and compare the conserved and divergent aspects of the ethylene signaling pathway between Arabidopsis and rice. The crosstalk between ethylene and other plant hormones is also reviewed. Finally, we discuss how ethylene regulates plant growth, stress responses and agronomic traits. These analyses should help expand our knowledge of the ethylene signaling mechanism and could further be applied for agricultural purposes.

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