EXPERIMENTAL STUDIES OF THE ATTACHMENT OF THE PARASITIC ANGIOSPERM AGALINIS-PURPUREA TO A HOST
EXPERIMENTAL STUDIES OF THE ATTACHMENT OF THE PARASITIC ANGIOSPERM AGALINIS-PURPUREA TO A HOST
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DOI：
10.1007/bf01281804
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发表时间：
1983-01-01
期刊：
影响因子：
2.9
通讯作者：
RIOPEL, JL
中科院分区：
文献类型：
--
作者：
BAIRD, WV;RIOPEL, JL
紫云英A.Purpurea(L.)英国皇家空军。玄参科(Scrophulariaceae)是一种兼性根寄生虫。吸器是专门用于寄主附着和穿透的器官，在寄主根分泌物或特定吸器诱导分子作用下，寄生的S根发育迅速。Haustoria最早在诱导后6-12h就能附着，36h达到最大附着水平，而发育到60-72h仍未接触寄主的吸器在建立联系时未能附着。然而，对于先前已连接到宿主的吸器，这一次的连接能力课程被扩展。依恋是一种非歧视性事件，诱导吸器会附着在各种生物和非生物底物上。黏附是通过特殊的吸器毛调节的，其表面覆盖着乳头状网络。乳突代表将吸器附着在宿主上的粘合剂。吸器上乳头状毛的比例与附着能力平行。
A. purpurea (L.) Raf. (Scrophulariaceae) is a facultative root parasite. Haustoria, the organs specialized for host attachment and penetration, develop rapidly after exposure of the parasite''s roots to host root exudate or specific haustoria-inducing molecules. Haustoria are competent to attach as early as 6-12 h post-induction and reach a maximal level of attachment by 36 h. Developing haustoria which have not contacted a host by 60-72 h of development fail to attach when contact is established. However, this time course of attachment competency is extended for haustoria which have previously been attached to a host. Attachment is a non-discriminatory event and induced haustoria will adhere to a variety of biological and non-biological substrates. Adhesion is mediated through specialized haustorial hairs whose surface is covered with a papillate network. The papillae represent the cement which attaches the haustorium to its host. The proportion of papillate hairs on haustoria parallels the attachment competency.