Abstract
A protein isolated from filtrates of the fungus Trichoderma viride induces ethylene biosynthesis when applied to tobacco (Nicotiana tabacum, cv, Xanthi) leaf tissue. The protein has a molecular weight of 22,000 dalton, a pI of 9.4, and is active as an β-1,4-endoxylanase. The protein is referred to as an ethylene biosynthesis-inducing xylanase (EIX). When applied to cut petioles, EIX is translocated through the xylem and unloaded from the xylem into the leaf mesophyll. In addition to inducing ethylene biosynthesis, it induces several other responses, e.g., ACC synthase gene activation, PR protein accumulation, ion leakage, secondary product formation and tissue necrosis. Not all tobacco varieties respond to EIX. Sensitivity is regulated by a single dominant nuclear gene carried by the cultivar Xanthi.
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© 1993 Springer Science+Business Media Dordrecht
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Anderson, J.D. et al. (1993). Fungal Xylanase Elicits Ethylene Biosynthesis and other Defense Responses in Tobacco. In: Pech, J.C., Latché, A., Balagué, C. (eds) Cellular and Molecular Aspects of the Plant Hormone Ethylene. Current Plant Science and Biotechnology in Agriculture, vol 16. Springer, Dordrecht. https://doi.org/10.1007/978-94-017-1003-9_46
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DOI: https://doi.org/10.1007/978-94-017-1003-9_46
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