Rupture Test: A New Method for Evaluating Maize (Zea mays) Seed Vigour

Area of Science:

• Agricultural Science
• Plant Physiology
• Biotechnology

Background:

• Seed vigour is crucial for crop establishment and yield.
• Traditional seed vigour tests can be time-consuming and lack precision.
• Biomechanical events during germination offer potential new indicators of seed quality.

Purpose of the Study:

• To develop and evaluate a novel seed vigour test for maize (Zea mays) based on biomechanical rupture events.
• To assess the feasibility of the rupture test (RT) using pericarp-testa rupture (PR) and coleorhiza rupture (CR) as indicators.
• To correlate RT results with field seedling emergence data.

Main Methods:

• Developed a new rupture test (RT) procedure for maize seed vigour evaluation.
• Utilized 24 hybrid maize seed lots for testing.
• Assessed seed quality patterns using RT and compared them with conventional methods.
• Performed correlation and regression analyses with field seedling emergence data.

Main Results:

• The physiological quality pattern determined by RT aligned with other seed testing methods.
• Positive correlations (p < 0.01) were observed between CR percentage and PR + CR percentage with field seedling emergence.
• Optimal conditions for RT were identified as 15°C for 120h and 20°C for 72h.

Conclusions:

• The rupture test (RT) is a cogent and effective method for evaluating maize seed vigour.
• RT provides a reliable alternative to traditional seed vigour tests.
• This approach offers a valuable reference for developing new seed vigour tests based on germination biomechanics for other crops.