External aluminium supply regulates photosynthesis and carbon partitioning in the Al-accumulating tropical shrub Melastoma malabathricum.

Cellulose, hemicellulose and lignin concentrations There were no differences among Al treatments or between populations in the concentrations of cellulose or lignin in either leaves or stems (S4-S6 Tables in S1 Appendix ), but both these fractions declined significantly in root tissues in response to Al addition ( Fig 3 ) and there was a parallel decline in hemicellulose concentrations in roots that was marginally non-significant (F 2,30 = 3.09, P = 0.060, S4 Table in S1 Appendix ).

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