PHYTOALEXIN INDUCTION IN THE SAPWOOD OF PLANTS OF THE MALOIDEAE (ROSACEAE) - BIPHENYLS OR DIBENZOFURANS
PHYTOALEXIN INDUCTION IN THE SAPWOOD OF PLANTS OF THE MALOIDEAE (ROSACEAE) - BIPHENYLS OR DIBENZOFURANS
复制标题
DOI：
10.1016/0031-9422(95)00443-b
复制
发表时间：
1995-12-01
期刊：
影响因子：
3.8
通讯作者：
HARBORNE, JB
中科院分区：
文献类型：
--
作者：
KOKUBUN, T;HARBORNE, JB
接种真菌或自然侵染后，Aronia、木瓜、Eriobotrya、Malus(3种种)的边材中均能不同程度地诱导产生5种联苯类植物保卫素(桃叶素及其2‘和4’氧合衍生物)。和花椒属植物。相比之下，在椰子(Cotoneaster，7种)、山楂(Crateagus)、独角果(Cydonia)、梅斯皮卢斯(Mespilus)、石楠(Photinia)、假独角莲(Pseudcydonia)、火棘属(Pracantha)、梨属(Pyrus)和两种花椒(Sorbus spp.)的边材中均能不同程度地诱导出14种二苯并呋喃类植物保卫素。(S.chamaemesilum和S.home tica)。它们是五个椰子呋喃，三个二碘呋喃，五个丙酮呋喃和一个2，3，4，7，8-五氧基二苯并呋喃三甲醚。尽管邻羟基联苯在理论上是二苯并呋喃的前体，但目前还没有发现植物产生这两种类型的植物保卫素。合成联苯或二苯并呋喃的能力似乎因属而异，但花椒除外。在测试的38种植物中，有18种植物防御素伴随着结构性抗真菌酚，其中大多数似乎在感染过程中以结合(糖苷)的形式释放出来。这些化合物分别鉴定为对苯二酚、对羟基苯乙酮、乙酰香草酮、5，7-二羟色酮、白杨素、樱桃素和柚皮素。桃亚科和绣线菊亚科的木本成员在诱导过程中不能产生任何植物抗真菌蛋白，但含有结构性抗真菌化合物。作为一个整体，植物抗真菌蛋白在整个家族中的反应频率有限，被认为与这些植物中结构性抗真菌药物的积累有关。
Following fungal inoculation or natural infection, five biphenyl phytoalexins (aucuparin and its 2' and 4' oxygenated derivatives) were induced variously in the sapwood of Aronia, Chaenomeles, Eriobotrya, Malus (three spp.) and of Sorbus aucuparia. By contrast, 14 dibenzofuran phytoalexins were induced variously in sapwood of Cotoneaster (7 spp.), Crateagus, Cydonia, Mespilus, Photinia, Pseudocydonia, Pyracantha, Pyrus and two Sorbus spp. (S. chamaemespilum and S. domestica). These were five cotonefurans, three eriobofurans, five pyrufurans and a 2,3,4,7,8-pentaoxygenated dibenzofuran trimethyl ether. No plant has yet been found to produce both types of phytoalexin, although o-hydroxybiphenyls are theoretically precursors of the dibenzofurans. The ability to synthesize either biphenyls or dibenzofurans appears to be genus-specfic, except in the case of Sorbus. In 18 of the 38 species tested, these phytoalexins were accompanied by constitutive antifungal phenolics, most of which appeared to be released from bound (glycosidic) forms during the infection process. These were identified variously as hydroquinone, p-hydroxyacetophenone, acetovanillone, 5,7-dihydroxychromone, chrysin, sakuranetin and naringenin. Woody members of the subfamilies Prunoideae and Spiraeoideae failed to yield any phytoalexins on induction, but did contain constitutive antifungal compounds. The limited frequency of the phytoalexin response within the family as a whole is considered in relation to the accumulation of constitutive antifungal agents in these plants.