Special Issue: Phytohormone-like Plant Growth Regulators: Plant Responses, Stress Mitigation, and Crosstalk

Recently discovered natural plant growth substances that have phytohormone-like regulatory roles are polyamines (putrescine, spermidine, spermine etc.), sugars (glucose, sucrose, trehalose etc.), neurotransmitters (serotonin, melatonin, dopamine, acetylcholine and GABA), strigolactones and karrikins. In recent years, several studies have focused on the factors and mechanisms that regulate plant growth and development, as well as the functioning of signaling pathways in plant cells. The application of these phytohormone-like plant growth regulators (PGRs) at low concentration would help to bring rapid and significant changes in the phenotypes of plants; as well as boost growth, translocation of nutrients from source to sink, increase economic part of plants and productivity of crops under normal and adverse conditions.

Polyamines play important roles in diverse plant growth and developmental processes and in environmental stress responses. With the development of molecular biotechnology techniques, there is increasing evidence that polyamines, whether applied exogenously or produced endogenously via genetic engineering, can positively affect plant growth, productivity, and stress tolerance. Saccharides play an important role in the life of plants: they are structural, storage and respiratory substrates, and intermediate metabolites of many biochemical processes. Sugar-metabolizing enzymes and sugar transporters are important in regulating plant growth and development, such as in the vegetative to generative phase transition. Neurotransmitters have emerged as potential signaling molecules in the last decade of investigations in various plant systems. They have been found to play important roles in plant life including-organogenesis, flowering, ion permeability, photosynthesis, circadian rhythm, reproduction, fruit ripening, photomorphogenesis, adaptation to environmental changes. Likewise, strigolactones and karrikin molecules regulate different biological processes, but overlapping functions have been reported as well, in which both molecules can have either similar or opposite effects.

A better understanding of the uptake, transport, metabolism, signalling process, mechanisms and the crosstalk of these PGRs has increased our knowledge of the physiological and molecular roles in growth and development of the plants, but many information are still missing.

To better understand the significance of these phytohormone-like PGRs for plants, we intend to bring forth a special issue topic "Phytohormone-like Plant Growth Regulators: Plant Responses, Stress Mitigation, and Crosstalk" highlighting the research taking place in these areas. The intended research topic will comprise the articles from diverse areas of plant science including Molecular biology, biochemistry, biotechnology, nanotechnology, proteomics, genomics, metabolomics, etc.

In this special issue, we welcome Original Research and Review articles to highlight recent advancements on physiological and biochemical responses of plants to phytohormone-like PGRs under normal as well as challenging conditions. The focus will be on the following topics (but not limited to):

  • Phytohormone-like PGRs: Applications, functions, and plant responses
  • Phytohormone-like PGRs and redox regulation: recent interventions
  • Signalling and crosstalk of phytohormone-like PGRs with traditional plant hormones 
  • Phytohormone-like PGRs-induced regulation of stress responses

Researchers interested in submitting to this special issue are encouraged to send a pre-submission enquiry to the Guest Editors. 

The deadline to submit to this special issue is 30 April 2022.

Guest Editors:

Dr. Tariq Aftab
Department of Botany, Aligarh Muslim University, Aligarh, India
Email: tarik.alig@gmail.com

Dr. M. Naeem
Department of Botany, Aligarh Muslim University, Aligarh, India
Email: naeemgaur@gmail.com

Dr. Parvaiz Ahmad
Department of Botany and Microbiology, King Saud University, Saudi Arabia
Email: parvaizbot@yahoo.com