Invasive Species Compendium

Detailed coverage of invasive species threatening livelihoods and the environment worldwide

Abstract

Effects of aluminum stress on growth characteristics and biomass allocation of Plantago virginica.

Abstract

The objective of the present investigation is to observe the effects of different Al3+ concentration (100, 500, 800, 2 000 mg/L) along with different duration times (10, 20, 30 d) on growth characteristics and biomass allocation of the invasive plant P. virginica. The results showed that 100 mg/L of Al3+ had little effect on the growth of P. virginica. Under 2 000 mg/L of Al3+, both leaf areas and leaf numbers of P. virginica decreased. Spike number of P. virginica was promoted under 2 000 mg/L Al3+ stress for a short treatment time, but its growth velocity was inhibited over a long period 2 000 mg/L. With aggravating Al3+ stress, a trend was found that its biomass allocation prefered aboveground to underground. The proportion of its spikes increased rapidly to a peak and then declined rapidly over the subsequent days under high concentration of Al3+, revealing an adaptive strategy for its reproducing during unfavorable circumstances.