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Root pruning is effective in alleviating the inhibition of soybean growth caused by anaerobic stress for a short period

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Journal of Integrative Agriculture 2023年第4期22卷 1035-1044页

作者： Koji YAMANE Miki MARIYAMA Yoshihiro HIROOKA Morio IIJIMA Graduate School of Agriculture Kindai UniversityNara 631-8505Japan

Soybean is an important upland crop,but its productivity is often limited by anaerobic stress caused by *** ability to adjust root growth under environmental constraints is an important physiological trait for adapting to an everchanging environment,and root pruning is an artificial technique for regenerating the root *** the present study,we investigated whether root pruning in soybean can effectively alleviate the inhibitory effects of anaerobic *** plants were affected by anaerobic stress at the germination,vegetative stage 1(V1),and reproductive stage 1(R1)stages,and then the plants were treated with root pruning just after the stress *** plants at the germination stage were treated with root cap and tip removals after hypoxia(N_(2)treatment).Root cap removal was more effective in suppressing the inhibitory effects of hypoxia than root tip removal(5 mm from the tip).The shoot dry weights of the soybean plants with and without root cap removal after hypoxia were 51.2 and 73.8%of the control,respectively,while the root dry weights of plants with and without root cap removal after hypoxia were 43.2 and 62.8%of the control,*** root cap removal effectively enhanced soybean growth after anaerobic stress,the root cap may be the candidate tissue for the stress memory *** soybean plants at the V1 stage of growth were affected by anaerobic stress,the branch number,pod weight in the main stem,root length,and root surface area of the soybean plants treated with anaerobic stress at the R1 stage significantly decreased compared with those of the *** contrast,root pruning(2 mm from the tip)immediately after the stress treatment enhanced root growth,branch number,and pod *** branch number,pod weight,root length,and root surface area of the plants treated with root pruning were 1.13,1.14,1.12,and 1.13 times higher than those of plants treated with anaerobic *** was observed in the roo

关键词： crack fertilization nodulation control root cap removal stress memory waterlogging

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