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Release of the benzoxazinoids defense molecules during lateral- and crown root emergence in Zea mays.

Abstract：

:We observed the release of the benzoxazinoids defense molecules on the surface of the primary root and the coleoptilar node in Zea mays during the emergence of lateral- and crown-roots, respectively. At later stages of crown root and lateral root development, benzoxazinoids around the emerged roots were no longer observed. Specific mutants revealed that the developmental status of the emerged roots was not important for the release of benzoxazinoids, but the breakage of the epidermis by emerging roots was. This is the first report of benzoxazinoid-release during normal development controlled by endogenous developmental programs. Release of benzoxazinoids around the emerging roots supports the idea that defense molecules accumulate at the site of root emergence in order to reduce pathogenic infections. We discuss possible explanations for the evolution of two different developmental mechanisms of root emergence.

journal_name

J Plant Physiol

journal_title

Journal of plant physiology

authors

Park WJ,Hochholdinger F,Gierl A

doi

10.1016/j.jplph.2004.01.005

subject

Has Abstract

pub_date

2004-08-01 00:00:00

pages

981-5

issue

8

eissn

0176-1617

issn

1618-1328

pii

S0176-1617(04)00024-0

journal_volume

161

pub_type

杂志文章

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