Regulating Plant Architecture to Enhance the Future of Cereal Crop Production

Cereal crops such as rice, wheat, maize, and barley are vital sources of food and income for millions of people worldwide. The architecture of cereal plants, encompassing their height, branching patterns, and inflorescence structure, is crucial in determining their yield potential, adaptability to different environments, and resistance to biotic and abiotic stresses. Boosting cereal production is essential to meet the food demands of a growing population, stimulate economic growth, and ensure sustainable agriculture. Cereal plant architecture is shaped by a combination of genetic, environmental, and hormonal factors. While genetic factors are fundamental in determining plant structure, environmental conditions can influence gene expression, leading to different phenotypic outcomes. Hormones like auxin, cytokinin, and gibberellin regulate key aspects of plant architecture, including root and shoot growth, leaf expansion, and branching. Additionally, brassinosteroids and strigolactone signaling pathways are involved in tiller development in cereal crops. This review aims to provide a comprehensive analysis of the latest research on cereal plant architecture, emphasizing the genetic, environmental, and hormonal regulation. Understanding these factors can support the creation of new cereal varieties with enhanced yield and stress tolerance, contributing to global food security and sustainability amid climate change and population growth.