Abstract
1-Aminocyclopropane-1-carboxylic acid (ACC) has been identified as an intermediate in methionine-derived ethylene (C2H4) biosynthesis in higher plants. This study was designed to assess the effectiveness of ACC as an C2H4-precursor in soil. Gas chromatographic analysis indicated that amendment with ACC (up to 10 mM) stimulated the biosynthesis of C2H4 in two Pakistani soils. Results also revealed that substrate (ACC)-dependent Cfl4 production was inhibited when the soils were amended either with glucose (as a C source), NH4NO3 (N source) or antibiotics. The ACC-derived C2114 biosynthesis in both soils was maximum when the soil suspension was amended with 10 mill substrate and incubated at pH 7.5 fora period of 1201r at 35 °C under shaking (120 rpm) conditions. Comparison of soils revealed that C2H4 production was relatively greater in a silty clay loam Si (containing 1.15% organic C) soil compared to a loamy 52 (containing 0.54% organic C) soil.
Zilli-Huma Nazti, Baby Shahroona, ZahirA. Zahir, Muhammad Khalid, Muhammad Arshad. (2003) 1-Aminocyclopropane-1-carboxylic acid (ACO)-dependent production of ethylene in two Pakistani soils, The Journal Soil & Environment , Volume 22, Issue 2.
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