PMID: 15362639Sep 15, 2004Paper

Research advance in cyclic hydroxamic acids, main allelochemicals of Zea mays

Ying yong sheng tai xue bao = The journal of applied ecology
Chengrong NieMei Li

Abstract

The research advance in cyclic hydroxamic acids was reviewed in this paper. Cyclic hydroxamic acids are the important natural products of cereal crops. They and their respective derivatives are the constitutive compounds of a wide variety of gramineous plants and few dicot plants. They have structural diversity and different natural occurrences. Because of their phytotoxic properties, cyclic hydroxamic acids show a great variety of biological activities. They are the defensive agents against plant diseases, pests, nematodes and other plants. The distribution of cyclic hydroxamic acids in Zea mays and their variation in relation to the age were focused on in the paper. In Zea mays, there are structural diversity of cyclic hydroxamic acids and related benzoxazolinones. DIMBOA (1,4-benzoxazin-3(4H)-ones) is the most abundant derivative in Zea mays. The content of cyclic hydroxamic acids is strongly cultivar-dependent in Zea mays. Hydroxamic acids are not present in seeds. After germination, the level of DIMBOA increases, and the maximum level occurs in young seedlings a few days after germination. DIMBOA exists in all parts of plants, and its concentration is generally higher in shoots than in roots. In all stages, the young leave...Continue Reading

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