Inventing hyperaccumulator plants: improving practice in phytoextraction research and terminology

Area of Science:

• Environmental Science
• Biotechnology
• Geochemistry

Background:

• Anthropogenic activities lead to widespread toxic metal and metalloid pollution.
• Phytoextraction offers a sustainable solution for metal remediation and phytomining.
• A significant increase in publications highlights research interest but also reveals propagation of poor practices.

Purpose of the Study:

• To address and correct common misconceptions in phytoextraction research.
• To establish accurate definitions for in planta metal accumulation.
• To prevent the continuation of flawed methodologies and 'template papers'.

Main Methods:

• Review and critical analysis of existing phytoextraction literature.
• Identification and categorization of common methodological errors.
• Development of clear definitions and best-practice guidelines.

Main Results:

• Misconceptions include misidentification of hyperaccumulator species and misuse of Bioconcentration Factors.
• Inappropriate experimental designs, such as extremely high hydroponic doses and using low-accumulation crops, are prevalent.
• The 'template paper' phenomenon, where established findings are superficially replicated, inflates publication numbers without advancing the field.

Conclusions:

• Accurate definitions and standardized methodologies are crucial for advancing phytoextraction research.
• Correcting poor practices will improve research quality and funding allocation.
• This work aims to guide researchers, editors, and reviewers towards more rigorous and impactful phytoextraction studies.