J Integr Plant Biol. ›› 2020, Vol. 62 ›› Issue (9): 1270-1292.DOI: 10.1111/jipb.12932

Special Issue: Light signaling

• Invited Expert Review • Previous Articles     Next Articles

Light signaling and UV-B-mediated plant growth regulation

Arpita Yadav1, Deeksha Singh1, Maneesh Lingwan2, Premachandran Yadukrishnan1, Shyam Kumar Masakapalli2 and Sourav Datta1,*   

  1. 1Department of Biological Sciences, Indian Institute of Science Education and Research (IISER) Bhopal, Bhopal, Madhya Pradesh, 462066, India
    2School of Basic Sciences, Indian Institute of Technology (IIT) Mandi, Kamand, Himachal Pradesh, 175005, India

    Email: Sourav Datta (sdatta@iiserb.ac.in)
  • Received:2020-03-09 Accepted:2020-03-26 Online:2020-04-01 Published:2020-09-01


Light plays an important role in plants’ growth and development throughout their life cycle. Plants alter their morphological features in response to light cues of varying intensity and quality. Dedicated photoreceptors help plants to perceive light signals of different wavelengths. Activated photoreceptors stimulate the downstream signaling cascades that lead to extensive gene expression changes responsible for physiological and developmental responses. Proteins such as ELONGATED HYPOCOTYL5 (HY5) and CONSTITUTIVELY PHOTOMORPHOGENIC 1 (COP1) act as important factors which modulate light‐regulated gene expression, especially during seedling development. These factors function as central regulatory intermediates not only in red, far‐red, and blue light pathways but also in the UV‐B signaling pathway. UV‐B radiation makes up only a minor fraction of sunlight, yet it imparts many positive and negative effects on plant growth. Studies on UV‐B perception, signaling, and response in plants has considerably surged in recent times. Plants have developed different strategies to use UV‐B as a developmental cue as well as to withstand high doses of UV‐B radiation. Plants’ responses to UV‐B are an integration of its cross‐talks with both environmental factors and phytohormones. This review outlines the current developments in light signaling with a major focus on UV‐B‐mediated plant growth regulation.

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