Scientists uncovered the significant role of silicon in boosting rice and wheat resilience

A research team from the Institute of Plant Science and Resources at Okayama University, led by Dr. Naoki Yamaji, conducted a study that highlights the importance of silicon (Si) in supporting the growth and resilience of rice, wheat, and other grasses. Silicon, one of the most abundant elements on Earth, is essential for these plants to combat environmental stressors.

The findings, detailed in a post on Phys.org, reveal the discovery of a signaling protein named Shoot-Silicon-Signal (SSS). This protein is critical for regulating the intake and distribution of silicon in plants, enhancing their tolerance to stress and thereby contributing to agricultural productivity and sustainability. “Optimization of Si significantly bolsters crop resilience and sustainability,” Dr. Yamaji stated.

Plants accumulate silicon to enhance their immune systems, promoting healthier growth and providing resilience against biotic factors such as fungal infections and climate-related stressors, including drought, salinity, and extreme temperatures. This role of silicon is particularly significant given the recent global reduction in crop productivity by 51-82%, largely due to these environmental challenges.

SSS, a homolog of the florigen hormone that regulates flowering, plays a critical role in managing silicon when its levels are abundant in soil, allowing plants to adjust their internal levels accordingly. This discovery not only opens new avenues for improving Si management in crops but also enables the use of SSS as a marker to optimize silicon fertilization, thereby enhancing the resilience of crops to environmental stresses.

Dr. Yamaji’s findings could have profound implications for global food security. “This discovery opens up new possibilities for improving Si management in crops, particularly in regions where Si availability in soil is reduced by cultivation,” he stated. By enhancing our understanding of how plants regulate silicon intake, we can develop more efficient fertilization strategies and ultimately enhance crop resilience globally.

The significance of these insights extends to staple crops like rice and wheat, which are vital for the diets of millions globally, especially in India where they account for about 50% of the population’s daily energy intake. Dr. Yamaji adds, “Si is not just an element that plants accumulate; it’s an adaptive tool that helps them thrive and survive. By harnessing the power of Si, we can help ensure a more sustainable and productive agricultural future.”

The research also ties into broader studies focused on plant growth regulation in search of sunlight and the development of deeper root systems in arid regions, further underscoring the potential of scientific advancements in agriculture.