Home > Publications database > Phenotypic response to soil compaction varies among genotypes and correlates with plant size in sorghum > print

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024 7 _ |a 10.1007/s11104-021-05160-z
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100 1 _ |a Correa, Jose
|0 P:(DE-Juel1)169627
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|e First author
245 _ _ |a Phenotypic response to soil compaction varies among genotypes and correlates with plant size in sorghum
260 _ _ |a Dordrecht [u.a.]
|c 2022
|b Springer Science + Business Media B.V
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520 _ _ |a AbstractAimsSoil compaction is a major yield-reducing factor worldwide and imposes physico-chemical constraints to plant growth and development. Facing limitations, roots can adapt and compensate for loss of functioning through their plasticity. Being primarily a belowground challenge, tolerance to soil compaction needs to be associated with root phenotype and plasticity. It is therefore of importance to distinguish between size-related apparent and size-independent adaptive plasticity. We determined the above- and belowground plasticity of sorghum genotypes varying in overall plant size.MethodsWe quantified plasticity as the degree response (adaptive and apparent plasticity) to soil compaction and conducted two experiments with sorghum and two soil density levels (1.4 and 1.8 Mg m−3). First, we quantified the shoot biomass plasticity of 28 sorghum genotypes. Second, we studied the root plasticity of six genotypes varying in shoot size and tolerance to soil compaction.ResultsPlasticity was correlated with plant biomass with larger genotypes responding earlier and more intensely. Soil compaction affected roots more than shoots and plasticity was expressed foremost in nodal root number and fine root length. Impeded plants produced 35 and 47% less root mass and length, respectively.ConclusionsPlasticity to soil compaction varies among genotypes, but less-sensitive lines are in general smaller-sized genotypes. The association between tolerance and plant biomass may pose challenges to crop production; however, vigorous genotypes with unresponsive shoots to soil compaction do exist. Maintaining shoot growth relatively stable while the root modifies its structure can be an important adaptation mechanism to soil compaction.
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700 1 _ |a Postma, Johannes A.
|0 P:(DE-Juel1)144879
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700 1 _ |a Wojciechowski, Tobias
|0 P:(DE-Juel1)156560
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|e Corresponding author
773 _ _ |a 10.1007/s11104-021-05160-z
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|p 59 - 72
|t Plant and soil
|v 472
|y 2022
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856 4 _ |u https://juser.fz-juelich.de/record/904865/files/Correa2022_Article_PhenotypicResponseToSoilCompac.pdf
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