6 research outputs found

    Simulation of return on investment (ROI %) with varying prices of <i>in vitro</i>- produced AMF inoculum and increasing P fertilizer prices.

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    <p>(a) Simulation based on sale of dry cassava root produced in Yopal. (b) Simulation based on sale of fresh cassava root produced in Yopal. (c) Simulation based on sale of fresh cassava root produced in Santana. The diagonal red line represents the ROI for the most profitable treatment with AMF inoculation, at that site, when simulating varying inoculum price. The top horizontal blue line represents the ROI for the most profitable non-inoculated treatment at current P fertilizer prices, even though this may not necessarily be what farmers normally practice. Blue horizontal lines below represent a simulation of ROI for this treatment with a scenario of increasing P fertilizer prices (+20%, +40%, +60%, +80% and +100% price increase). Vertical dashed lines represent the price for the amount of inoculum used in these experiments (right) and the price for half of the amount of inoculum which represents the recommended dose (left).</p

    Effects of inoculation with AMF and P fertilization on cassava root fresh weight or yield (t.ha<sup>−1</sup>) in Santana.

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    <p>Black shaded bars represent the weight of AMF-inoculated cassava and white bars represent the weight of non-inoculated cassava. Error bars represent +1 S.E. Different letters above bars represent significant differences at <i>P</i>≤0.05.</p

    Fengycin C Produced by <i>Bacillus subtilis</i> EA-CB0015

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    <i>Bacillus subtilis</i> EA-CB0015 was isolated from the phyllosphere of a banana plant and tested for its potential to produce bioactive compounds against <i>Mycosphaerella fijiensis.</i> Using a dual plate culture technique the cell-free supernatant of <i>B. subtilis</i> EA-CB0015 produced inhibition values of 89 ± 1%. The active compounds were purified by solid-phase extraction and HPLC, and their primary structures determined using mass spectrometry and amino acid analysis. A new fengycin isoform, fengycin C, with the amino acid sequence Glu-Orn-Tyr-Thr-Glu-Val-Pro-Gln-Thr-Ile was isolated. The peptidic moiety differs from fengycin B at position 9 and from fengycin A at positions 6 and 9. The β-hydroxy fatty acyl chain is connected to the N-terminal of the decapeptide and can be saturated or unsaturated, ranging from 14 to 18 carbons. The C-terminal residue of the peptidic moiety is linked to the tyrosine residue at position 3, forming the branching point of the acyl peptide and the eight-membered cyclic lactone
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