Plant roots sense soil compaction through restricted ethylene diffusion

第一作者：Bipin K. Pandey

第一单位：英国诺丁汉大学

通讯作者：Malcolm J. Bennett

 Abstract 

背景回顾：Soil compaction represents a major challenge for modern agriculture.

直观假设：Compaction is intuitively thought to reduce root growth by limiting the ability of roots to penetrate harder soils.

新发现：We report that root growth in compacted soil is instead actively suppressed by the volatile hormone ethylene.

结果1-乙烯不敏感突变体：We found that mutant Arabidopsis and rice roots that were insensitive to ethylene penetrated compacted soil more effectively than did wild-type roots.

结果2-紧实土壤限制乙烯扩散：Our results indicate that soil compaction lowers gas diffusion through a reduction in air-filled pores, thereby causing ethylene to accumulate in root tissues and trigger hormone responses that restrict growth.

结论：We propose that ethylene acts as an early warning signal for roots to avoid compacted soils, which would be relevant to research into the breeding of crops resilient to soil compaction.

 摘 要 

doi: https://doi.org/10.1126/science.abf3013

Journal: Science

Published date: Jan 15, 2021

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