Potential Role of Plant Growth Regulators in Administering Crucial Processes Against Abiotic Stresses

Ayman E.L. Sabagh*, Sonia Mbarki, Akbar Hossain, Muhammad Aamir Iqbal, Mohammad Sohidul Islam, Ali Raza, Analía Llanes, Mariana Reginato, Md Atikur Rahman, Wajid Mahboob, Rajesh Kumar Singhal, Arpna Kumari, Karthika Rajendran, Allah Wasaya, Talha Javed, Rubab Shabbir, Junaid Rahim, Celaleddin Barutçular, Muhammad Habib Ur Rahman, Muhammad Ali RazaDisna Ratnasekera, Ömer Konuskan l, Mohammad Anwar Hossain, Vijay Singh Meena, Sharif Ahmed, Zahoor Ahmad, Muhammad Mubeen, Kulvir Singh, Milan Skalicky, Marian Brestic, Oksana Sytar, Emine Karademir, Cetin Karademir, Murat Erman, Muhammad Farooq

*Corresponding author for this work

Research output: Contribution to journalReview articlepeer-review

4 Citations (Scopus)

Abstract

Plant growth regulators are naturally biosynthesized chemicals in plants that influence physiological processes. Their synthetic analogous trigger numerous biochemical and physiological processes involved in the growth and development of plants. Nowadays, due to changing climatic scenario, numerous biotic and abiotic stresses hamper seed germination, seedling growth, and plant development leading to a decline in biological and economic yields. However, plant growth regulators (PGRs) can potentially play a fundamental role in regulating plant responses to various abiotic stresses and hence, contribute to plant adaptation under adverse environments. The major effects of abiotic stresses are growth and yield disturbance, and both these effects are directly overseen by the PGRs. Different types of PGRs such as abscisic acid (ABA), salicylic acid (SA), ethylene (ET), and jasmonates (JAs) are connected to boosting the response of plants to multiple stresses. In contrast, PGRs including cytokinins (CKs), gibberellins (GAs), auxin, and relatively novel PGRs such as strigolactones (SLs), and brassinosteroids (BRs) are involved in plant growth and development under normal and stressful environmental conditions. Besides, polyamines and nitric oxide (NO), although not considered as phytohormones, have been included in the current review due to their involvement in the regulation of several plant processes and stress responses. These PGRs are crucial for regulating stress adaptation through the modulates physiological, biochemical, and molecular processes and activation of the defense system, upregulating of transcript levels, transcription factors, metabolism genes, and stress proteins at cellular levels. The current review presents an acumen of the recent progress made on different PGRs to improve plant tolerance to abiotic stress such as heat, drought, salinity, and flood. Moreover, it highlights the research gaps on underlying mechanisms of PGRs biosynthesis under stressed conditions and their potential roles in imparting tolerance against adverse effects of suboptimal growth conditions.

Original languageEnglish
Article number648694
JournalFrontiers in Agronomy
Volume3
DOIs
Publication statusPublished - Dec 8 2021

Keywords

  • abiotic stress
  • climate change
  • crosstalk
  • nitric oxide
  • polyamines
  • stress tolerance

ASJC Scopus subject areas

  • Agronomy and Crop Science
  • Agricultural and Biological Sciences (miscellaneous)
  • Plant Science
  • Soil Science

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