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( Mahpara Safdar ),( Sunho Park ),( Woochan Kim ),( Yonghyun Gwon ),( Yeon-ok Kim ),( Jangho Kim ) 한국농업기계학회 2023 한국농업기계학회 학술발표논문집 Vol.28 No.2
Seed germination and root development serve as crucial indicators of plant growth and development. Here, we introduce a set of artificial multiscale topographical patterns based on polydimethylsiloxane (PDMS) comprising uniformly spaced ridge/groove structures for plant root growth and development. PDMS-based multiscale patterns were prepared to mimic the native plant cell wall’s aligned micro-nanofiber structure and its relative hydrophobicity. The width of the ridge and groove in these multiscale patterns range from 400 nm to 5 μm, categorized into two groups: dense (400-800 nm) and sparse (5 μm). Importantly, Arabidopsis cultured on these matrices exhibited a remarkable bidirectional trend, with maximum root growth and thickness observed at sparse feature density, whereas the maximum anisotropic root alignment toward gravity observed at the dense case, exhibiting a monotonic decrease as feature size increases. The ultra-tiny multiscale patterns design can serve as a novel platform for investigating phenotypes and gene networks, providing ample molecular genetic resources for controlling plant root growth and development. Together, our study provides pioneering evidence of biomimetic topographical cues with substantial potential to manipulate and enhance plant root development through micro-/nanoarchitecture interactions dependent on feature size, presenting a significant advancement in understanding root developmental pathways.